CN106596531B - A kind of method and device detecting volatile organic compounds - Google Patents
A kind of method and device detecting volatile organic compounds Download PDFInfo
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- CN106596531B CN106596531B CN201611027039.8A CN201611027039A CN106596531B CN 106596531 B CN106596531 B CN 106596531B CN 201611027039 A CN201611027039 A CN 201611027039A CN 106596531 B CN106596531 B CN 106596531B
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 61
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 56
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 239000011701 zinc Substances 0.000 claims abstract description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- -1 tetraphenylporphines manganese chloride Chemical class 0.000 claims abstract description 9
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims abstract description 8
- 229940099607 manganese chloride Drugs 0.000 claims abstract description 8
- 235000002867 manganese chloride Nutrition 0.000 claims abstract description 8
- 239000011565 manganese chloride Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 128
- 235000019441 ethanol Nutrition 0.000 claims description 33
- 239000012159 carrier gas Substances 0.000 claims description 28
- 239000013307 optical fiber Substances 0.000 claims description 22
- 229910052736 halogen Inorganic materials 0.000 claims description 16
- 238000001228 spectrum Methods 0.000 claims description 16
- 150000002367 halogens Chemical class 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 14
- 239000010937 tungsten Substances 0.000 claims description 14
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000741 silica gel Substances 0.000 claims description 12
- 229910002027 silica gel Inorganic materials 0.000 claims description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 150000002894 organic compounds Chemical class 0.000 claims description 10
- 150000004032 porphyrins Chemical class 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
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- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 206010070834 Sensitisation Diseases 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 230000008313 sensitization Effects 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 125000001424 substituent group Chemical group 0.000 claims description 3
- 238000002211 ultraviolet spectrum Methods 0.000 claims description 3
- YNHJECZULSZAQK-UHFFFAOYSA-N tetraphenylporphyrin Chemical class C1=CC(C(=C2C=CC(N2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3N2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 YNHJECZULSZAQK-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 238000004497 NIR spectroscopy Methods 0.000 claims 1
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- 239000011572 manganese Substances 0.000 claims 1
- 238000004445 quantitative analysis Methods 0.000 abstract description 9
- 238000000985 reflectance spectrum Methods 0.000 abstract description 5
- 239000000523 sample Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000004611 spectroscopical analysis Methods 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 235000000332 black box Nutrition 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
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- 238000002329 infrared spectrum Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 230000008786 sensory perception of smell Effects 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- YIYFFLYGSHJWFF-UHFFFAOYSA-N [Zn].N1C(C=C2N=C(C=C3NC(=C4)C=C3)C=C2)=CC=C1C=C1C=CC4=N1 Chemical compound [Zn].N1C(C=C2N=C(C=C3NC(=C4)C=C3)C=C2)=CC=C1C=C1C=CC4=N1 YIYFFLYGSHJWFF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007793 ph indicator Substances 0.000 description 1
- RKCAIXNGYQCCAL-UHFFFAOYSA-N porphin Chemical compound N1C(C=C2N=C(C=C3NC(=C4)C=C3)C=C2)=CC=C1C=C1C=CC4=N1 RKCAIXNGYQCCAL-UHFFFAOYSA-N 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- 239000011734 sodium Substances 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06166—Line selective sources
- G01N2201/0618—Halogene sources
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- Chemical Kinetics & Catalysis (AREA)
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of method and devices for detecting volatile organic compounds.Preferably go out the metalloporphyrin zinc (TPPZn) and the tetraphenylporphines manganese chloride (OEPMncl) sensitive to ethyl acetate to alcohol sensible first, makes the capture sensor of organic gas；Then gas entrapment sensor device is utilized, reacts the organic gas after being sufficiently enriched with completely with the quick material of color；Vis/NIR instrument detection device is finally used, the reflectance spectrum of the gas entrapment sensor after obtaining reaction establishes detection model to volatile organic compounds in conjunction with chemometrics method.Methods and apparatus of the present invention is able to achieve the quantitative analysis to volatile organic compounds, compares traditional analysis, is remarkably improved corresponding detection efficiency, is more suitable for field quick detection analysis.
Description
Technical field
The present invention relates to the detection technique of volatile organic compounds and equipment, specifically using color sensitive sensor technology,
Vis/NIR technology detects the method and device of volatile organic compounds.
Background technique
Volatile organic compounds (volatile organic compounds, VOCs) refer to boiling spread 50~
Organic compound between 260 DEG C, comprising: alcohol, acid, ammonia and ester etc.；It is mainly derived from petrochemical industry, automobile exhaust gas, household dress
It repairs.Based on features described above, they are referred to as the more serious atmosphere pollution of the second major class after dust, therefore
It is necessary to go to study corresponding detection method and the corresponding detection device of exploitation, this protects people's health life and environment
Shield is also of great significance to.
Gas chromatography (GC), mass spectrography (MS) and gas chromatography-mass spectrography (GC-MS) are relatively early to be used to test and analyze
The technological means of volatile organic compounds can identify, measure hundreds of basic gas componant and volatile organic compounds.But
It is that above-mentioned technical requirements its gas, liquid, solid for being analyzed are stable at the operational；Corresponding operation temperature is not
More than analyzed liquid, solids gasification temperature；In addition, conventional desktop instrument figure is larger, be unable to satisfy field real-time acquisition,
The demand of on-line analysis detection.
Such as application No. is 201520488455.2 " a kind of novel modified version gas phase chromatographic devices for VOC monitoring " specially
Benefit, disclosed modified version gas phase chromatographic device include: cooling, heating, separation, four part of cavity.In the patent, cavity portion sets up separately
There are peripheral board and inner chamber body；Cooling segment includes blower, air port sealing plate, electromagnet, cooling airway；Heating part is using heating
Silk, positioned at the front end of blower；Separate section uses capillary chromatograph, positioned at the front end of heater strip, although the unit temp controls
Accurately, good effect of heat insulation, but corresponding equipment price is expensive, and volume is larger, is unfavorable for on-site test.
Gas sensor be it is a kind of can perceive certain gas and its device or device of concentration in environment, can will be with gas kind
Class and concentration dependent information are converted into electric signal, to be detected, monitoring analysis.But the research of gas sensor relates to
And it is wide, difficulty is big, belongs to the research field of multi-crossed disciplines, the development difficulty of gas sensitive is big；Function is more single, mostly
The ingredient of multiple gases can not be detected with a kind of instrument.
Such as application No. is a kind of 200710078560.9 " fiber gas sensor " patent, disclosed optical fiber gas sensings
Device includes: incident ray and the output optical fiber, reaction tank and metalloporphyrin solution etc..The patent be by under test gas under reaction tank
The blow vent of side is added, and VOCs gas is soluble in organic solvent in addition, to make VOCs gas and metalloporphyrin solution sensitivity object
Matter is sufficiently reacted.Different metalloporphyrin solution is added from the feed opening of reaction tank, can have simultaneously to plurality of target gas
Effect detection, improve the sensitivity and use scope of detection to a certain extent, but spent porphyrin solution is more, cost compared with
Height, while also cannot achieve the analysis quantitative to VOCs.
Vis/NIR is a kind of comprising visible light (visible light, VIS) and near infrared light (near-
Infrared, NIR) section electromagnetic wave, corresponding wave-length coverage is 380~1700nm, is widely used to solid, in liquid
The quick detection of organic principle is used widely, such as fruit, meat, birds, beasts and eggs in the analysis field of food, quality of agricultural product
Deng, but the analysis to volatile organic compounds, it is only confined to Fourier's near-infrared (FT-NIR) detection of laboratory operation, and
Corresponding instrument price is expensive, and on line real time is difficult to realize.
According to reacting for specific the sensing quick material of color and volatile organic compounds to be detected, corresponding volatility can be used as
Organic compound captures sensor array, carries out qualitative classification and quantitative analysis to organic gas to be detected to realize.Metal porphin
Quinoline and organic gas can occur to be coordinated association reaction, its energy is caused to change.This variation, can be in visible-range
Spectrum is characterized, it is sufficient to carry out analysis detection to organic gas.
As Qi Rubin, Yin Xin et al. are adopted in " the near infrared spectrum quantitative detecting method of multi-component organic-gas " text
It is carried out near infrared spectrum (1620~1750nm) of the offset minimum binary modeling method to propane, propylene and toluene mixed gas
Modeling analysis, but near infrared spectrometer volume used by the research is big, and self-made type sample cell is expensive in addition, does not have general
Adaptive.
Such as Zhao Jiewen, build et al., in " olfaction visualization technology and its differentiation " to 5 kinds of chemical substances text, institute
The olfaction visualization system of development detects 5 kinds of ethyl alcohol, formaldehyde, ammonia, acetone, acetic acid common chemical substances, though
So using porphyrins and hydrophobicity pH indicator as the quick material of color, but set using scanner as the detection of color difference
It is standby, it cannot achieve the quantitative analysis to organic compound.
Therefore a kind of method for finding easy quickly detection volatile organic compounds, has to actual production demand is met
Important realistic meaning.The present invention obtains the volatilization gas of organic compound using the metalloporphyrin printed and dyed in substrate as carrier, with
Complexation reaction occurs in it, and by Vis/NIR detection and analysis, it reacts front and back with organic compound volatilization gas
Spectrum change, in conjunction with corresponding chemometrics method, it can be achieved that the fast quantitative analysis of organic gas.
Summary of the invention
It is volatilized the purpose of the present invention is to provide a kind of based on the detection of color sensitive sensor-Vis/NIR technology
Property organic compound method and device, realize to the fast quantitative analysis of volatile organic compounds.
For method and device of the invention, it is specific the technical solution adopted is as follows:
A method of based on color sensitive sensor-Vis/NIR technology detection volatile organic compounds, packet
Include following steps:
Step 1, the production of gas entrapment sensor: pass through quantum chemistry experiment calculation, spectrum dynamic analysis, and combine
Physico-chemical analysis experimental verification filters out the metalloporphyrin zinc TPPZn to alcohol sensible, the tetraphenylporphines sensitive to ethyl acetate
Manganese chloride OEPMncl；Two kinds of quick materials of color are dissolved in organic solvent with a certain concentration, it is quick as color using C2 reverse phase silica gel plate
Material support；The quick material of color is fixed on sensor carrier using capillary point sample method, 1 × 2 gas entrapment is formed and passes
Sensor array；
Step 2, the diffusing reflection spectrum detection of the visible/near infrared band of sensor: volatile organic compound is captured
Object is carried along into reaction chamber after gas collection chamber is effectively enriched with, through carrier gas, passes with the gas entrapment for being placed in reaction chamber top
Sensor sufficiently reacts；Halogen tungsten lamp light source is connect with Vis/NIR instrument with y-type optical fiber；Using halogen tungsten lamp light source conduct
Input light source, the sensor after scan capture gas；With Vis/NIR instrument obtain capture gas after sensor can
See/the diffusing reflection spectrum near infrared band region；
Step 3, the optimization analysis of organic gas detection model: using standard normal variable transformation SNV to visible/near infrared
Spectroscopic data is pre-processed, and carries out modeling optimization analysis using joint section Partial Least Squares si-PLS.
Further, in step 1 gas entrapment sensor production, pass through the various metal centers of quantum chemistry calculation, push-and-pull
The porphyrin of electronics and substituent group finally combines verification experimental verification, selects quick to alcohols gas in conjunction with ultraviolet spectra dynamic analysis
The metalloporphyrin zinc TPPZn of sense and tetraphenylporphines manganese chloride OEPMncl to esters gas sensitization, as color sensitive sensor-
The gas entrapment sensor of Vis/NIR device.
Further, the quick material of color in step 1, metalloporphyrin zinc TPPZn, tetraphenylporphines manganese chloride OEPMncl is molten
In dichloromethane solvent, diluted concentration is the solution of 2.0mg/mL；Porphyrins are printed and dyed on the reversed silica gel plate of C2, diffusion
Property is good, stability is high；In capillary point sample method, two kinds of quick materials of color form the round spot that diameter is each about 0.2cm on silica gel plate.
Further, in step 2, effective enrichment is that organic compound dosage is 8.0mL, and the gas collection time is
20min has enough room and times to reach optimal volatilization effect；The abundant reaction, is being carried along into through carrier gas
Reaction chamber completely attaches to sensor and reacts 5min.
Further, in step 2, the halogen tungsten lamp light source is multipurpose light source, and the service life is up to 10000 hours, and being suitable for can
See/near infrared wavelength region be 360nm-2000nm；It is interior when the visible/near infrared wavelength is within the scope of 360nm-1200nm
Embedding filter supporter is 50.8 square millimeters, with a thickness of 3.0mm, can effectively obtain visible/near infrared region wave band；It is described defeated
The stability for entering light source is that tungsten halogen lamp output stability is 0.15% (peak-to-peak), drifts about per hour less than 0.3%.
Further, in step 2, the Vis/NIR instrument is small in size, easy to carry；The spectrometer module,
Wave-length coverage is 300nm~1100nm, covers visible and near infrared region；Spectrometer grating be 600 quarter lines per millimeter, optics
Resolution ratio is 1.5nm FWHM, and scanning optical spectrum information is more preferably.
Further, in step 3, the organic gas detection model is the detection model of ethyl alcohol and the detection mould of ethyl acetate
Type；The detection model of the ethyl alcohol joint [371.15nm 401.68nm], [402.68nm 432.3nm],
In four range of wavelengths of [829.18nm854.45nm], [1002.76nm 1025.7nm], model related coefficient is higher, stability
Preferably；The detection model of the ethyl acetate, joint [371.15nm 401.68nm], [666.64nm 694.15nm],
In four range of wavelengths of [749.21nm 775.76nm], [802.64nm 828.55nm], model related coefficient is higher, stability
Preferably.
The technical solution of the device of the invention are as follows:
A kind of device based on color sensitive sensor-Vis/NIR technology detection volatile organic compounds, packet
Include gas entrapment sensor device and Vis/NIR instrument detection device；
The gas entrapment sensor device, nitrogen is as carrier gas；The carrier gas enters device from carrier gas inlet；The load
Gas entrance is connected through carrier gas channel with valve A；The valve A is connected through carrier gas channel with gas collection chamber；The gas collection
Room is connected with valve；In the gas collection chamber between admission line and organic liquid surface, outlet pipe and gas collection chamber
It is maintained a certain distance between top；The valve is connected with reaction chamber air inlet；It places gas and catches in the reaction chamber top
Obtain sensor；The reaction chamber gas outlet is connected through carrier gas channel with exhaust collection ball；
In the Vis/NIR instrument detection device, objective table is fixed with object carrying support；The objective table, loading
Bracket and y-type optical fiber sound end, are placed in black-box operation room；The sound end of the y-type optical fiber is fixed through object carrying support；Institute
The incident optical end for stating y-type optical fiber is connected with halogen tungsten lamp light source, to obtain stable light source input；The y-type optical fiber it is anti-
It penetrates optical fiber end to connect with Vis/NIR instrument, to obtain the reflectance spectrum in the visible/near infrared region of the quick material of color；Institute
It states Vis/NIR instrument and is connected through data line with computer, with the corresponding spectrometer software of real-time operation, obtain sensing battle array
The spectroscopic data of column.
Further, it in the gas entrapment sensor device, is provided with carrier gas cleaning pipeline and carrier gas carries volatility and has
Machine compound pipeline；Pipeline is cleared up in the carrier gas, is equipped with valve A and valve B；The valve A and valve B first time standard-sized sheet
When, pipeline is in cleaning state, and when second of standard-sized sheet, the volatile organic compounds in gas collection room is under carrier gas carrying
Into reaction chamber and gas entrapment sensor response；Admission line and organic liquid surface keep 1.0cm's in gas collection chamber
Distance, outlet pipe is kept at a distance from 0.5cm with collecting chamber top, sufficiently to carry the organic gas in gas collection room.
Further, in the Vis/NIR instrument detection device, objective table is diameter 10.0cm, height 1.0cm
Cylindrical base；The height of the object carrying support is adjustable, up to 15.0cm；It is 80.0cm's that the black-box operation room, which is side length,
Square carton, front center enabling size are 30.0cm*40.0cm；The y-type optical fiber sound end is in black-box operation room
In with objective table keep 0.3cm distance, can effectively contact the quick round spot of color on silica gel plate；The quick round spot diameter of color is 0.2cm,
The hot spot of y-type optical fiber sound end is completely covered.
Beneficial effects of the present invention, specific as follows:
First, the production for gas entrapment sensor array: passing through quantum chemistry experiment calculation, spectrum dynamic analysis
And physico-chemical analysis experimental verification, filter out the metalloporphyrin zinc (TPPZn) to alcohol sensible, four benzene sensitive to ethyl acetate
Base porphines manganese chloride (OEPMncl) makes the capture sensor of organic gas；
Second, enrichment and capture operation for volatile organic compounds: organic compound to be detected is using fixation
Dosage and the gas collection time, can have enough room and times, to reach more preferably volatilization effect；The organic gas that will volatilize out
Body makees the carrying of carrier gas through nitrogen, can sufficiently react with gas entrapment sensor in the reaction chamber；
Third, being operated for the spectral detection of the sensor after capture gas: the gas entrapment sensor after reaction is used
Multi-functional halogen tungsten lamp light source irradiation, input light signal are stablized；Using the spectrometer of visible/near infrared band, can examine
The reflected spectrum data of sensor array after surveying capture organic gas；
Fourth, the optimization for organic gas detection model is analyzed: with standard normal variable transformation (SNV) to visible/close
After ir data pretreatment, modeling optimization analysis is carried out using joint section Partial Least Squares (si-PLS)；For second
The detection model of alcohol, in joint [371.15 401.68], [402.68 432.3], [829.18 854.45], [1002.76
1025.7] when four range of wavelengths, model related coefficient is higher, and stability is preferable；For the detection model of ethyl acetate, joining
Close [371.15 401.68], [666.64 694.15], [749.21 775.76], [802.64 828.55] four range of wavelengths
When, model related coefficient is higher, and stability is preferable；
Fifth, for gas entrapment sensor device: being provided with carrier gas cleaning pipeline and carrier gas carries volatile organic
Property management road is closed, the content of volatile organic compounds can be effectively acquired；In gas collection room, admission line and organic liquor body surface
Face, outlet pipe and collecting chamber top is corresponding keeps certain distance, can sufficiently carry the organic gas in gas collection room
It is reacted with gas entrapment sensor array；
Sixth, for Vis/NIR instrument detection device: special according to the gas entrapment sensor array after reaction
Sign, has made the object carrying support to match and black-box operation room；Halogen tungsten lamp light source and visible/near infrared are connected using y-type optical fiber
Spectrometer can monitor the spectral information real-time transmission of acquisition to computer end on-line organic gas content to realize.
Detailed description of the invention
Fig. 1 is 1 × 2 gas entrapment sensor schematic of the invention；
Fig. 2 is experimental provision schematic diagram of the invention；It (a) is gas entrapment sensor device schematic diagram；(b) for it is visible/
Near-infrared spectrum detection device schematic diagram；
Fig. 3 is si-PLS detection model of the TPP-Zn to ethyl alcohol；
Fig. 4 is TPP-Zn in ethyl alcohol, ethyl acetate mixed gas, the si-PLS detection model of alcohol gas.
In figure: 1 valve A, 2 gas collection chamber, 3 valve B, 4 gas entrapment sensors, 5 reaction chambers, 6 exhaust collection balls, 7
Objective table, 8 object carrying supports, 9 black-box operation rooms, 10Y type optical fiber, 11 halogen tungsten lamp light sources, 12 data connecting lines, 13 is visible/close red
External spectrum instrument.
Specific embodiment
Technical solution of the present invention is described in further detail below with reference to the drawings and specific embodiments.The present invention
There is versatility to volatile organic compounds quantitative detection.Object gas selected by the implementation case adheres to different low of two classes separately
The malicious class and relatively small VOCs of harmfulness, respectively ethyl alcohol, ethyl acetate, other types of volatile organic compounds can join
Examine the progress of this example.
The implementation case preferably goes out that two kinds of sensitivity are higher, the quick material of the stronger color of reliability；It is sensed using gas entrapment
Device device, the indoor volatile organic compounds of capture reaction；Utilize Vis/NIR instrument detection device, detection capture
The reflected spectrum data of sensor array after gas, achievees the purpose that fast quantitative analysis.Specific technical solution is as follows:
1, gas entrapment sensor array production process of the invention, specific as follows:
It is dynamic in conjunction with ultraviolet spectra by the various metal centers of quantum chemistry calculation, the porphyrin of push-and-pull electronics and substituent group
Mechanical analysis finally combines verification experimental verification, filters out 2 kinds of porphyrins, respectively metalloporphyrin zinc (TPPZn), four benzene
Base porphines manganese chloride (OEPMncl).Two kinds of quick materials of color used in the present invention can have with alcohols, esters volatility respectively
Machine compound reacts, and generates the color change of varying strength, has good selectivity, sensitivity.
Porphyrins are dissolved in dichloromethane solvent respectively, by micro-sampling capillary by 2 kinds of quick materials of color by
A printing and dyeing are in C2On reversed silica gel plate, 1 × 2 gas entrapment sensor array such as Fig. 1 is constituted.
2, organic gas of the invention detects operating process, specific as follows:
Before capture organic gas starts, carrier gas (nitrogen) is that 80mL/min is directly entered reaction chamber 5 with flow velocity, makes to sense
Device keeps stable state；Stop nitrogen flowing into, closes valve A 1, valve B 3,8mL test sample is taken to be placed in gas collection chamber 2
In it is closed, keep state 20min, organic compound made to reach preferable volatilization effect；Valve A 1, B 2 are successively opened,
Carrier gas is switched to flow regime, makes test sample in the environment of stationary temperature, humidity, as carrier gas is carried along into reaction chamber
5 react with gas entrapment sensor 4, and contact 5min sufficiently reacts.
Before the detection of Vis/NIR instrument starts, halogen light source 11 connects 220V alternating current, and preheats 30min,
10 sound end of y-type optical fiber is connect with object carrying support 8 and fixed certain altitude, 10 incident optical end of y-type optical fiber connect halogen light
Source 11,10 mirror based fiber optica end of y-type optical fiber connect Vis/NIR instrument 13, it is seen that/near infrared spectrometer 13 is passed by data
Defeated line 12 is connected with computer.Corresponding 13 operating software of Vis/NIR instrument is opened, time of integration 20ms is set, is put down
Slippery 5 is counted, and mean scan number 5 times, carries out corresponding dark correction and Bai Jiaozheng；It takes out anti-in gas entrapment sensor device
C after answering2Reversed silica gel plate is placed in objective table 7, and 10 sound end of y-type optical fiber is directed at the quick material round spot of color on silica gel plate,
The reflectance spectrum for successively acquiring two kinds of quick materials of color, is recorded as the quick material spectrum numerical value of color of the current sample after capturing.
3, the foundation and method for optimization analysis of organic gas detection model of the invention, specific as follows:
The Vis/NIR of acquisition contains noise information, background drift etc., need to be established with chemometrics method more
First regression model carries out analysis prediction.The present invention measures volatile organic compounds-second using Vis/NIR instrument
The reflectance spectrum of alcohol, ethyl acetate after capture sensing, locates spectroscopic data using standard normal variable transformation (SNV) in advance
Reason, joint section Partial Least Squares (si-PLS) carries out selection variables, and models to spectroscopic data, and quantitative analysis is organic
The content of gas.
4, the device of the invention based on color sensitive sensor-Vis/NIR technology detection organic gas, specifically
It is as follows:
It is gas entrapment sensor device such as Fig. 2 (a), mainly includes valve A 1, gas collection chamber 2, valve B 3, gas
Body captures sensor 4, reaction chamber 5, exhaust collection ball 6.Wherein, nitrogen enters device from carrier gas inlet as carrier gas；Carrier gas enters
Mouth is connected through carrier gas channel with valve A 1；Valve A 1 is connected through carrier gas channel with gas collection chamber 2；Gas collection chamber 2 and valve
Door 3 is connected；Admission line and organic liquid surface and outlet pipe and 2 top of gas collection chamber, are protected in gas collection chamber 2
Hold a certain distance；Valve 3 is connected with the air inlet of reaction chamber 5；Place gas entrapment sensor 4 in 5 top of reaction chamber；Reaction chamber
5 gas outlet is connected through carrier gas channel with exhaust collection ball 6.
It is Vis/NIR instrument detection device such as Fig. 2 (b), mainly includes objective table 7, object carrying support 8, camera bellows behaviour
Make room 9, y-type optical fiber 10, halogen tungsten lamp light source 11, data connecting line 12, it is seen that/near infrared spectrometer 13.Wherein, objective table 7 with
Object carrying support 8 is that 1.0cm drilling is fixed through diameter；Objective table 7, object carrying support 8 and 10 sound end of y-type optical fiber are placed in camera bellows
In operating room 9；The sound end of the y-type optical fiber 10 is fixed through object carrying support 8；The incident optical end of the y-type optical fiber 10 and halogen
Tungsten light source 11 is connected, to obtain stable light source input；The mirror based fiber optica end of the y-type optical fiber 10 and visible/near infrared
Spectrometer connection 13, to obtain the reflectance spectrum in the visible/near infrared region of the quick material of color；The Vis/NIR instrument
13 are connected through data line 12 with computer, with the corresponding spectrometer software of real-time operation, obtain the spectroscopic data of sensor array.
Below in conjunction with specific case study on implementation, the present invention will be described in detail.But these case study on implementation are not intended to limit this
Invention, structure that those skilled in the art are made according to these case study on implementation, method or transformation functionally are wrapped
Containing within the scope of the present invention.
Case study on implementation 1: the detection of different concentration ethanol gas
A kind of novel different concentration ethanol gas detection method, includes the following steps:
(1) such as Fig. 1, it is 1 × 2 gas entrapment sensor array, is produced as follows: (1) accurately weighing the gold of 10mg respectively
Belong to zinc porphyrin (TPPZn) and the quick material of tetraphenylporphines manganese chloride (OEPMncl) color, be dissolved in methylene chloride, is settled to 5mL appearance
Measuring bottle, ultrasonic 15min dissolution processing, obtains the solution that concentration is 2mg/mL.(2) 1uL is drawn with the capillary of 100 × 0.3mm
The quick material solution of color simultaneously assists point of sample on the hydrophobic reversed silica gel plate of 3 × 3cm with array mould plate.(3) exist to the quick material of color
Stabilization is evaporated on silica gel plate, just obtains 1 × 2 gas entrapment sensor array as shown in Figure 1, it is individually sealed with swatch pouches
It saves backup.
(2) take the ethanol solution of various concentration (volumetric concentration) in beaker, corresponding concentration gradient successively 10%,
20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, the corresponding four parallel test samples of each concentration gradient will be to
After test sample is originally successively sequentially placed in gas collection chamber 20min, contacted under the carrying of carrier gas with gas entrapment sensor array
5min.The quick sensor array of color after taking out reaction, is placed on the objective table in black-box operation room, adjusts object carrying support height, makes
It obtains fibre-optical probe and covers the quick material round spot of color.Spectrometer relevant parameter, setting are as follows: time of integration 20ms, smoothness 5 are counted, and are put down
Equal scanning times 5 times, after carrying out corresponding dark correction and white correction, carry out Vis/NIR Data Detection.
(3) Vis/NIR acquired contains noise information, background drift etc., is converted using standard normal variable
(SNV) spectroscopic data is pre-processed；Selection variables are carried out using joint section Partial Least Squares (si-PLS), and to light
Modal data is modeled, the content of alcohol gas ingredient in quantitative analysis sample.If Fig. 3 is that TPP-Zn examines the si-PLS of ethyl alcohol
Model to be surveyed, when principal component is 4, combines [2 3 18 25] section, related coefficient reaches 0.9706, RMSECV 0.0622,
Model stability is preferable.
Case study on implementation 2: in ethyl alcohol, ethyl acetate mixed gas, the detection of alcohol gas
In a kind of novel ethyl alcohol, ethyl acetate mixed gas, the detection detection method of alcohol gas, including walk as follows
It is rapid:
(1) with case study on implementation 1: (1) in the detection of different concentration ethanol gas.
(2) ethyl alcohol that takes comparable sodium, ethyl acetate solution are in beaker, mixed volume proportion are as follows: ethyl alcohol volume accounting
It is followed successively by 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, ethyl acetate volume accounting is followed successively by
90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, the corresponding three parallel test samples of each mixing match
This, after sample to be tested is successively sequentially placed in gas collection chamber 20min, under the carrying of carrier gas with gas entrapment sensor array
Contact 5min.Vis/NIR instrument is detected with case study on implementation 1: spectrum in (2) in the detection of different concentration ethanol gas
Detection.
(3) Vis/NIR acquired contains noise information, background drift etc., is converted using standard normal variable
(SNV) spectroscopic data is located in advance；Selection variables are carried out using joint section Partial Least Squares (si-PLS), and to spectrum
Data are modeled, the content of alcohol gas in quantitative analysis sample.If Fig. 4 is TPP-Zn to ethyl alcohol, ethyl acetate gaseous mixture
In body, the si-PLS detection model of alcohol gas combines [5 11 15 21] section when principal component is 5, and related coefficient reaches
To 0.9672, RMSECV 0.067, model stability is preferable.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (5)
1. a kind of method for detecting volatile organic compounds, which comprises the following steps:
Step 1, the production of gas entrapment sensor: passing through quantum chemistry experiment calculation, spectrum dynamic analysis, and combines physical and chemical
Experimental verification is analyzed, the metalloporphyrin zinc TPPZn to alcohol sensible, the tetraphenylporphines chlorination sensitive to ethyl acetate are filtered out
Manganese OEPMncl；Two kinds of quick materials of color are dissolved with a certain concentration in organic solvent, using C2 reverse phase silica gel plate as the quick material of color
Carrier；The quick material of color is fixed on sensor carrier using capillary point sample method, forms 1 × 2 gas entrapment sensor
Array (4)；
Step 2, capture the diffusing reflection spectrum detection of the visible/near infrared band of sensor: volatile organic compounds exists
After gas collection chamber (2) effectively enrichment, reaction chamber (5) are carried along into through carrier gas, are caught with the gas for being placed in reaction chamber (5) top
Sensor (4) is obtained sufficiently to react；Halogen tungsten lamp light source (11) is connect with Vis/NIR instrument (13) with y-type optical fiber (10)；
It is used as input light source using halogen tungsten lamp light source (11), the sensor after scan capture gas；With Vis/NIR instrument (13)
The diffusing reflection spectrum of the visible/near infrared band of sensor after obtaining capture gas；
Step 3, the optimization analysis of organic gas detection model: using standard normal variable transformation SNV to Vis/NIR
Data are pre-processed, and carry out modeling optimization analysis using joint section Partial Least Squares si-PLS；
The production of gas entrapment sensor in step 1 passes through the various metal centers of quantum chemistry calculation, push-and-pull electronics and substituent group
The porphyrin of group finally combines verification experimental verification, selects the metalloporphyrin to alcohols gas sensitization in conjunction with ultraviolet spectra dynamic analysis
Zinc TPPZn and tetraphenylporphines manganese chloride OEPMncl to esters gas sensitization, as color sensitive sensor-Vis/NIR Spectroscopy
The gas entrapment sensor of spectral apparatus；
In step 3, the organic gas detection model is the detection model of ethyl alcohol and the detection model of ethyl acetate；The ethyl alcohol
Detection model joint [371.15nm 401.68nm], [402.68nm 432.3nm], [829.18nm 854.45nm],
In [1002.76nm 1025.7nm] four range of wavelengths；The detection model of the ethyl acetate, in joint [371.15nm
401.68nm], [666.64nm 694.15nm], [749.21nm 775.76nm], [802.64nm 828.55nm] four wavelength
In section.
2. a kind of method for detecting volatile organic compounds according to claim 1, which is characterized in that in step 1
Metalloporphyrin zinc TPPZn, tetraphenylporphines manganese chloride OEPMncl are dissolved in dichloromethane solvent by the quick material of color, and diluted concentration is
The solution of 2.0mg/mL；Porphyrins are printed and dyed on the reversed silica gel plate of C2；In capillary point sample method, two kinds of quick materials of color exist
The round spot that diameter is each about 0.2cm is formed on silica gel plate.
3. a kind of method for detecting volatile organic compounds according to claim 1, which is characterized in that in step 2, institute
Effective enrichment is stated, is that organic compound dosage is 8.0mL, the gas collection time is 20min；The abundant reaction, is through carrier gas
The reaction chamber (5) that is carried along into completely attached to sensor and react 5min.
4. a kind of method for detecting volatile organic compounds according to claim 1, which is characterized in that in step 2, institute
Halogen tungsten lamp light source is stated, is multipurpose light source, the service life is up to 10000 hours, and being suitable for visible/near infrared wave-length coverage is 360nm-
2000nm；It is 0.15% that tungsten halogen lamp, which exports peak-to-peak stability, is drifted about per hour less than 0.3%.
5. a kind of method for detecting volatile organic compounds according to claim 1, which is characterized in that in step 2, institute
Stating Vis/NIR instrument (13) wave-length coverage is 300nm~1100nm, covers visible and near infrared region；Spectrometer
Grating be 600 quarter lines per millimeter, optical resolution be 1.5nm FWHM.
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| CN108484966B (en) * | 2018-05-04 | 2019-03-12 | 东莞理工学院 | Monitor the large deformation quick response intelligent driver and preparation method of organic gas |
| CN110031440A (en) * | 2019-04-29 | 2019-07-19 | 滁州学院 | A kind of gas-sensitive type fluorescent optical sensor detection device and its application in grease type food inspection |
| CN111307792A (en) * | 2020-02-20 | 2020-06-19 | 江苏大学 | Color-sensitive bionic sensing detection method for volatile metabolites of pork food-borne pathogenic bacteria |
| CN112540145A (en) * | 2020-11-04 | 2021-03-23 | 江苏大学 | Automatic chromatic aberration titrator and measuring method thereof |
| CN113092408A (en) * | 2021-04-28 | 2021-07-09 | 南通江天化学股份有限公司 | VOC (volatile organic compounds) based on near infrared spectrum technologySMedium formaldehyde detection system and detection method |
| CN113267493B (en) * | 2021-05-21 | 2023-04-11 | 江苏大学 | Method and device for continuously, rapidly and nondestructively detecting grain toxigenic bacteria based on composite nano color-sensitive sensor chip |
| CN113358806B (en) * | 2021-06-29 | 2023-10-10 | 江苏大学 | Rapid screening and detecting method and system for meat product characteristic metabolic volatile |
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