CN106018301A - Method for detecting water quality and multifunctional spectrograph - Google Patents
Method for detecting water quality and multifunctional spectrograph Download PDFInfo
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- CN106018301A CN106018301A CN201610491064.5A CN201610491064A CN106018301A CN 106018301 A CN106018301 A CN 106018301A CN 201610491064 A CN201610491064 A CN 201610491064A CN 106018301 A CN106018301 A CN 106018301A
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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
- G01N21/3103—Atomic absorption analysis
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
- G01N21/6404—Atomic fluorescence
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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
- G01N21/3103—Atomic absorption analysis
- G01N2021/3114—Multi-element AAS arrangements
-
- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
- G01N21/6404—Atomic fluorescence
- G01N2021/6406—Atomic fluorescence multi-element
Abstract
The invention relates to a method for detecting water quality and a multifunctional spectrograph. By adopting an atom absorption and atom fluorescent integration design technology, an atom absorption and atom fluorescent integration function is realized by sharing an external light path structure, a detection unit and a software system and flexibly switching atom generator components. The atom absorption function enables a sharp line light source to emit a characteristic spectral line of a detected element to be absorbed by the detected element through an atomizer, and a transmitted light beam reaches a detector photovoltaic multiplier tube after passing a monochromator to measure the absorption of sample vapor for the characteristic spectral line of the sharp line light source so as to determine the concentration of the atoms of the detected element. The atom fluorescent function enables the sharp line light source to emit the characteristic spectral line of the detected element to transmit through the atomizer and to stimulate the detected element, the detector photovoltaic multiplier tube receives an atom fluorescent signal generated by stimulating the atoms by virtue of flame of a hydride combustion head, an absorption signal of the sample vapor for the characteristic spectral line of the sharp line light source is acquired by performing amplification and analog-digital conversion on the signal acquired by a detector, and the atom concentration of the detected element is calculated.
Description
Technical field
The present invention relates to field of spectral analysis technology, particularly to a kind of method detecting water quality, the method uses flame method atom
Absorb and atomic fluorescence one body technique, be applied to drinking water safety detection；The invention still further relates to multifunctional light spectrometer, this spectrogrph
Use flame method Atomic Absorption and atomic fluorescence one body technique, have atomic absorption spectrometry function and atomic fluorescence method spectrum concurrently
Method analytic function, detects for rural drinking water safety.
Background technology
Atomic Absorption Spectrometer (Atomic Absorption Spectrometer, AAS), also known as atomic absorption spectrophotometer
(Atomic Absorption Spectrophotometer, AAS), is that it is total to by ground state atom based on element tested in vapor phase
Shake the absorption intensity radiated to measure a kind of spectrometric instrument of this constituent content in sample.Atomic Absorption Spectrometer is applied with it
Extensively, the most accurately, simple in construction, easy and simple to handle, lower-price characteristic is widely used.Atomic absorption spectrum
Instrument, through scientist's effort for many years, achieves significant progress.Particularly after the nineties, along with computer technology and
Developing rapidly of semiconductor technology, series of new techniques, the application of new device, the analytical tool such as AAS have been pushed to one new
Stage.
Entering 21 century, the features such as AAS is convenient, flexible with it, the most accurate, detection limit is low, price is relatively cheap, at ring
In environment pollution detection, food safety detection, life sciences, trace element and heavy metal pollution context of detection are widely used,
Current safe drinking water is the important foundation protected public health, and concerns national economy and social stability, always high by Party and government
Degree is paid attention to.Good water quality is to ensure the basic premise of Health and Living quality.But, along with economic fast development, surface water
The severeest with underground water pollution, cause China's town and country water supply situation to allow of no optimist.In recent years, although governmental input huge fund is accelerated
The construction of town and country centralized water supply facility, but, occurring and the generation of new pollution mode of emerging pollutant, pollute accordingly
Analyte detection, monitoring, population health risk assessment, the early warning and alert ability etc. of health risk need raising badly, to better ensure that drink
Water security health, protects population health.China's Atomic Absorption Spectrometer year dimensions of market more than 4000.But, some is former
Costly, maintenance cost is the highest for the instrument price of sub-absorption spectrometer.And disclosure satisfy that at present for rural potable water
The same quasi-instrument of the safety detection market demand or few.
Summary of the invention
The market demand is detected for countryside potable water security, under the precondition of satisfied detection demand, for the price of lowering apparatus,
Reducing testing cost, the present invention proposes a kind of method detecting water quality, and the method uses Atomic Absorption and atomic fluorescence one body technique.
Being specially flame method atomic absorption spectroscopy, the atomic fluorescence spectrophotometric of band hydride generation system, the present invention also carries
Go out a kind of multifunctional light spectrometer, this spectrogrph integrated flame method Atomic Absorption and atomic fluorescence Integral design, for water quality detection.
Technical solution of the present invention:
1. the method detecting water quality, it is characterised in that the method is by atomizer assembly and atomic fluorescence atomization assembly
Flexible conversion, i.e. atomizer are exchanged with hydride generation system module, share outer light path and detecting system, it is achieved Atomic Absorption
Function and atomic fluorescence functions are integrated；Described detecting system comprises detector photomultiplier tube PMT1 and detector photoelectricity times
Increase pipe PMT2；The method comprises the steps of:
Step one, adjusts the characteristic spectral line reflection that outer light path compound lens makes line source send tested element and is focused to strip light spots；
Step 2, adjusts light path, and a road is through atomizer assembly so that described strip light spots shines through atomizer sample
Combustion flame, then through atomizer combustion flame be tested element absorption；Or another road is through atomic fluorescence atomization assembly,
I.e. it is made to produce atomic fluorescence through perhydride generation combustion head flame excitation atom；
Step 3, transmitted light beam arrives detector photomultiplier tube PMT1 after monochromator, and atomic fluorescence excitation beam passes through
Lens light gathering arrives detector photomultiplier tube PMT2；
Step 4, described photomultiplier tube PMT1 and detector photomultiplier tube PMT2 amplified device connection mode number converter,
Described analog-digital converter is connected to gather the detector of signal；Described detector connects amplifier, is amplified by the signal collected,
Again by analog-digital converter, changing into digital signal, transmission is to computer；
Step 5, computer analyzing digital spectrum signal, the absorption to line source characteristic spectral line of the measuring samples steam, calculate really
The concentration of fixed tested Elements Atom.
2. described in, line source comprises hollow cathode lamp.
The most described atomizer is flame atomizer.
4. atomic fluorescence hollow cathode lamp described in, before the outer light path of incidence, first passes through lens focus, it is ensured that fluorescence hollow cathode lamp
Optical signal is all transmitted to atomic fluorescence hydride generator burner flame after the reflection of outer light path focuses on；Sharing with Atomic Absorption
In the case of light path, it is ensured that the energy intensity of atomic fluorescence hollow cathode modulating signal, ensure the measurement sensitivity of atomic fluorescence function.
5. hollow cathode lamp group described in uses rotatable lamp socket, and lamp socket quantity is 8；Described hollow cathode lamp group comprise 2 former
Sub-fluorescent lamp position, remaining 6 lamp position is Atomic Absorption hollow cathode lamp position.
6., in step 2, adjust the transmitted light beam after light path and pass through and only by a paths in the same time: through described atom
Change device assembly, or through described atomic fluorescence atomization assembly.
7. use deuterium lamp correcting mode to carry out eliminating the ambient interferences in various complex sample, i.e. utilize deuterium lamp to send continuous print spectrum
Band absorbs background signal；The bands of a spectrum broadband of described deuterium lamp is between 0.2～3nm.
8. a multifunctional light spectrometer, it is characterised in that comprise power subsystem, lamp power board, element lamp, outer light path,
Atomizer, monochromator, detector photomultiplier tube (PMT), atomic fluorescence atomization assembly, amplifier, analog-digital converter,
Detection control unit, computer；Described power subsystem is used for as described lamp power board, described analog-digital converter, described inspection
Survey control unit and supply of electric power is provided；Described outer light path comprise dispersion focusing system, reflecting mirror, entrance slit, focusing objective len,
Collimating mirror, grating, described element lamp i.e. hollow cathode lamp；There are two paths in the light that described hollow cathode lamp source sends:
Path one, through described atomizer；The light that described hollow cathode lamp source sends is focused to strip light through the reflection of outer light path
Speckle, transmission is through atomizer flame, and transmission light is reflected mirror and reflects through described entrance slit to described collimating mirror, described collimating mirror
Incident illumination reflection being focused on the parallel compound light belt of formation and exposes to described grating, complex light is divided into collimated monochromatic ligth by described grating,
Again through described focusing objective len, reflection focuses on through slit to described detector photomultiplier tube (PMT), and described photomultiplier transit light pipe will
The optical signal received is converted to analog electrical signal, more acquired partitioned signal collection, analog digital conversion, is uploaded to computer and transports
Calculate display；
Path two, through described atomic fluorescence atomization assembly；The light that described hollow cathode lamp source sends is poly-through the reflection of outer light path
Jiao is strip light spots, and transmission, through atomizer flame, excites hydride generator to generate sample flame through hollow cathode light-illuminating,
Thus produce the characteristic fluorescence signal of sample, the fluorescence optical signals received is converted to analog electrical signal by photomultiplier transit light,
The most acquired partitioned signal collection, analog digital conversion, it is uploaded to computer and carries out computing and show.
9. light-source system described in comprises two light sources: one is the hollow cathode lamp for absorbing sample signal, i.e. element lamp；Two are
For absorbing the deuterium lamp of background signal.
10. hollow cathode lamp group described in uses rotatable lamp socket, and lamp socket quantity is 8.
The light that hollow cathode lamp source described in 11. sends passed through and only by wherein one of described two paths in the same time, i.e.
Through described atomizer or through described atomic fluorescence atomization assembly.
Described in 12., a kind of element correspondence of multifunctional light spectrometer detection uses a lamp position；When multiple element is surveyed in detection, correspondence is installed simultaneously
Use multiple lamp position.
Hollow cathode lamp group described in 13. comprises 2 atomic fluorescence lamp positions, and its 6 lamp positions are Atomic Absorption hollow cathode lamp position.
The technology of the present invention effect:
Compared with prior art, the invention have the advantages that
1, the present invention uses Atomic Absorption and atomic fluorescence one body technique, is exchanged with hydride generation system module by atomizer,
Share outer light path and detecting system, it is achieved Atomic Absorption function and atomic fluorescence functions are integrated.The method is applied to drinking water
Flame atomic absorption method and the advantage of atomic fluorescence function are had both in water quality detection, both can quickly detect, and are capable of again multielement
Detect simultaneously.
2, detecting accurate signal to noise ratio high, accuracy is high.
3, the multifunctional light spectrometer of present invention design, is configured with Atomic Absorption flame atomization assembly and atomic fluorescence atomization assembly
Can be with flexible conversion, it is achieved Flame Atomic Absorption Spectrometry and atomic fluorescence be one test on same instrument, thus reduces detection
The purpose of cost.
Accompanying drawing explanation
Fig. 1 is instrument operation logic schematic diagram of the present invention.
Fig. 2 atomic absorption spectroscopy functional schematic.
Fig. 3 atomic fluorescence spectrometry functional schematic.
Fig. 4 instrumental optics structural representation.
Fig. 5 instrument electrical structure schematic diagram.
Fig. 6 is without background deduction index path.
Fig. 7 is band background deduction index path.
Fig. 8 is that Atomic Absorption switches schematic diagram with atomic fluorescence atomizer.
Fig. 9 is Atomic Absorption functional part schematic diagram
Figure 10 is atomic fluorescence functional part schematic diagram
Figure 11 is hollow cathode lamp component diagram.
Reference lists as follows: 1-hollow cathode lamp；2-semi-transparent semi-reflecting lens；3-deuterium lamp；4-standard lens；5-plane reflection
Mirror 1；6-spherical reflector 1；7-spherical reflector 2；8-plane mirror 2；9-entrance slit；10-concave mirror；11-
Grating；12-exit slit；13-photomultiplier tube PMT1；14-photomultiplier tube PMT2；15-monochromator；16-atomizer；
The outer light path compound lens of 17-.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched
State, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.Below with reference to the accompanying drawings the embodiment of the present invention is described in detail.
Fig. 1 is instrument operation logic schematic diagram of the present invention.Fig. 1 shows the design principle of the present invention, uses Atomic Absorption with former
Sub-fluorescence one technology for detection water quality.The present invention uses Atomic Absorption and atomic fluorescence one body technique, by atomizer and hydrogenation
Thing generating means module is exchanged, and shares outer light path and detecting system, it is achieved Atomic Absorption function and atomic fluorescence functions are integrated.
Particularly as follows: 1. flame method atomic absorption spectroscopy, the 2. atomic fluorescence spectrophotometric of band hydride generation system.
Spectrogrph (Spectroscope) is to be the scientific instrument of spectral line by the photolysis of complicated component, by prism or diffraction grating etc.
Constitute, utilize spectrogrph can Measuring Object surface reflection light.
Atomic absorption spectrum (Atomic Absorption Spectroscopy, AAS), i.e. atomic absorption spectrography (AAS), is based on gas
The absorption intensity of ultraviolet light and the corresponding atomic resonance radiation of visible-range is carried out quantitatively quilt by the ground state atom outer-shell electron of state
Survey the analysis method based on constituent content, be a kind of to measure the specific gaseous atom method to the absorption of light radiation.
Atomic fluorescence spectrophotometric (AFS) is to utilize the wavelength of atomic fluorescence spectral line and intensity to carry out the qualitative and quantitative of material
Analysis method, is the spectral analysis technique between atomic emission spectrum (AES) and atomic absorption spectrum (AAS).
Atomizer is that atomic absorption spectroscopy carries out the atomizing device of sample.Sample is converted into free atom steam (base by it
State atom), in order to Absorption Characteristics radiates, and seeks meter constituent content to be measured.The kind of atomizer is a lot, is broadly divided into flame former
Sonization device and the big class of electrothermic atomizer two, the present invention uses flame atomizer.The function of atomizer is to provide energy,
Make samples dried, evaporation and atomization.Incident beam is here absorbed by ground state atom, the most also it is considered as " absorption cell " so long.
Basic demand to atomizer: must have sufficiently high atomization efficiency；Must have good stability and reappear shape；
Simple to operate and low interference level etc..
Fig. 2 is atomic absorption spectroscopy functional schematic.Under Flame Atomic Absorption Spectrometry mode state, detector photomultiplier tube
(PMT) receive the transmitted light beam signal through monochromator, amplify and analog-to-digital conversion process by detector is gathered signal,
Complete, to the collection to the absorption signal of line source characteristic spectral line of the measuring samples steam, to calculate the concentration determining tested Elements Atom.
Fig. 3 atomic fluorescence spectrometry functional schematic.Under atomic fluorescence mode state, detector photomultiplier tube (PMT)
Receive and make it produce atomic fluorescence signal through perhydride generation combustion head flame excitation atom, by detector is gathered signal
Amplify and analog-to-digital conversion process, complete, to the collection to the absorption signal of line source characteristic spectral line of the measuring samples steam, to calculate really
The concentration of fixed tested Elements Atom.In conjunction with Fig. 1, Fig. 2 and Fig. 3, the present invention specifically comprises the steps of:
Specifically comprise the steps of:
Step one, line source sends the characteristic spectral line of tested element；
Step 2, line source (hollow cathode lamp) sends the sharp line spectra of fixing excitation wavelength.Through the combination of outer light path thoroughly
Mirror reflection is focused to strip light spots, then is tested element absorption through atomizer combustion flame, or the atom of sample is through hydrogen
Compound generation combustion head flame excitation atom makes its sample atom produce atomic fluorescence；
Step 3, transmitted light beam arrives detector photomultiplier tube (PMT) 1, atomic fluorescence excitation beam warp after monochromator
Cross lens light gathering and arrive detector photomultiplier tube (PMT) 2；This two paths can walk one, or walks another, but same
Time only has one.
Step 4, described photomultiplier tube PMT amplified device connection mode number converter, described analog-digital converter is connected to gather
The detector of signal；Described detector connects amplifier, is amplified by the signal collected, then by analog-digital converter, changes into
Digital signal, transmission is to calculating.
Step 5, computer analyzing digital spectrum signal, measuring samples steam is to line source (hollow cathode lamp) characteristic spectral line
Absorption, calculate and determine the concentration of tested Elements Atom.
The present invention also proposes a kind of spectrogrph, this spectrogrph integrated flame method Atomic Absorption and atomic fluorescence Integral design, for water
Quality detection.Fig. 4 and Fig. 5 is instrumental optics structural representation and instrument electrical structure schematic diagram respectively.As it can be seen, hollow the moon
The light that pole lamp source sends is focused to strip light spots through the reflection of outer light path, and transmission is through atomizer flame, and it is anti-that transmission light is reflected mirror
Penetrating through entrance slit to collimating mirror, incident illumination reflection is focused on the parallel compound light belt of formation and exposes to grating by collimating mirror, and grating will be multiple
Closing light and be divided into collimated monochromatic ligth, then line focus object lens, reflection focuses on through slit to detector photomultiplier transit, and photomultiplier transit light will connect
The optical signal received is converted to analog electrical signal, more acquired partitioned signal collection, analog digital conversion, is uploaded to computer and carries out computing
Display.
Atomic fluorescence function: the light that hollow cathode lamp source sends is focused to strip light spots through the reflection of outer light path, and transmission is through atomization
Device flame, excites hydride generator to generate sample flame through hollow cathode light-illuminating, thus the feature producing sample is glimmering
Optical signal, the fluorescence optical signals received is converted to analog electrical signal, more acquired partitioned signal collection, modulus by photomultiplier transit light
Conversion, is uploaded to computer and carries out computing and show.Atomic fluorescence can detect can generate at normal temperatures gaseous hydride, can
Launch the element of fluorescence, As, 11 kinds of transition elements such as Se, Hg and special metallic element can be detected, although measure element
Limited, but those elements are critically important, detect the hardest by Atomic Absorption.Atomic fluorescence and Atomic Absorption are under lab made
For complementation, major part metallic element and transition elements can be measured.
Fig. 6 is without background deduction index path.Fig. 7 is band background deduction index path.Band background deduction function is by increasing deuterium
Lamp and semi-transparent semi-reflecting lens, as shown in Figure 7, it is achieved deuterium lamp correction carries out background deduction correction, and background absorption interference is atomization mistake
Cheng Zhong, produces because of molecule absorption and the light scattering of the generation of sample matrices material.Background absorption interference general employing buckle back scape
Mode is corrected for, and uses deuterium lamp correcting mode to carry out eliminating the ambient interferences in various complex sample in the present invention exactly.At instrument
In device, using two light sources, one is that it sends element to be measured as the hollow cathode lamp (element lamp) absorbing sample signal
Sharp line spectra；Another is exactly as the deuterium lamp absorbing background signal, and it sends a continuous spectrum, and scope is about at 190nm～400nm
Between.Hollow cathode lamp (element lamp), according to different analytical element needs, sends the spectrum of a width of 0.0005nm of specific half-peak
New hand's spectral line of line and sample and background produces resonance and is absorbed, and obtains the summation of an absorption signal.What deuterium lamp sent is one
Individual continuous print band, on instrument, the bands of a spectrum broadband of deuterium lamp is set by instrument slit is affected, typically between 0.2～3nm,
In this width, deuterium lamp mainly absorbs background signal in a large number, and sample signal is owing to being affected by integral and calculating,
Compared with background signal, being only capable of being considered is a drop in the ocean (0.0005nm:2nm).Therefore the basis that deuterium lamp absorbs is permissible
Can be regarded as is the summation of background signal.
The subtraction that the signal that above two light source is surveyed processes through data, has finally given a signal having deducted background
The signal of the real sample of impact.
Fig. 8 (a) is that Fig. 9 obtains front view, and Fig. 8 (b) is the front view of Figure 10.Figure 11 is lamp place value displaying figure.See Figure 11,
Lamp socket is fixing is 8, and a kind of Element detection is only with a lamp position, and when surveying multiple element, lamp can be loaded onto simultaneously, meter during switching
Calculation machine controls software and controls automatically to rotate switching.Hollow cathode lamp group comprises 2 atomic fluorescence lamp positions, and other lamp positions are that atom is inhaled
Receive hollow cathode lamp position.
The Atomic Absorption that the present invention relates to and atomic fluorescence one body technique are to have both traditional flame method atomic absorption method and atomic fluorescence method
Spectral technique, the advantage with atomic absorption spectroscopy, as (1) selectivity is strong, (2) are highly sensitive, (3) analyst coverage
Extensively, (4) capacity of resisting disturbance is strong, and (4) precision is high.There is atomic fluorescence technological merit simultaneously, as (1) has relatively low inspection
Rising limit, highly sensitive (2) disturb less, and spectral line fairly simple (2) disturbs less, spectral line fairly simple (3) analytic set
Curve linear wide ranges, (4) can realize multielement simultaneous determination.In summary, this method that the present invention provides can be applied
Detect in rural potable water metal element content, the advantage taking into account flame atomic absorption method and atomic fluorescence, both can quickly detect,
Can detect by multielement again simultaneously.And this method has detection accurate signal to noise ratio height, the good result that accuracy is high.
It should be pointed out that, that the above detailed description of the invention can make those skilled in the art that the invention is more fully understood,
But limit the invention never in any form.Therefore, although the invention is entered by this specification referring to the drawings with embodiment
Gone detailed description, it will be understood by those skilled in the art, however, that still the invention can be modified or etc.
With replacing, in a word, all are without departing from the technical scheme of the spirit and scope of the invention and change thereof, and it all should be contained at this
In the middle of the protection domain of patented invention-creation.
Claims (13)
1. the method detecting water quality, it is characterised in that the method is by atomizer assembly and atomic fluorescence atomization assembly
Flexible conversion, i.e. atomizer are exchanged with hydride generation system module, share outer light path and detecting system, it is achieved Atomic Absorption
Function and atomic fluorescence functions are integrated；Described detecting system comprises detector photomultiplier tube PMT1 and detector photoelectricity times
Increase pipe PMT2；The method comprises the steps of:
Step one, adjusts the characteristic spectral line reflection that outer light path compound lens makes line source send tested element and is focused to strip light spots；
Step 2, adjusts light path, and a road is through atomizer assembly so that described strip light spots shines through atomizer sample
Combustion flame, then through atomizer combustion flame be tested element absorption；Or another road is through atomic fluorescence atomization assembly,
I.e. it is made to produce atomic fluorescence through perhydride generation combustion head flame excitation atom；
Step 3, transmitted light beam arrives detector photomultiplier tube PMT1 after monochromator, and atomic fluorescence excitation beam passes through
Lens light gathering arrives detector photomultiplier tube PMT2；
Step 4, described photomultiplier tube PMT1 and detector photomultiplier tube PMT2 amplified device connection mode number converter,
Described analog-digital converter is connected to gather the detector of signal；Described detector connects amplifier, is amplified by the signal collected,
Again by analog-digital converter, changing into digital signal, transmission is to computer；
Step 5, computer analyzing digital spectrum signal, the absorption to line source characteristic spectral line of the measuring samples steam, calculate really
The concentration of fixed tested Elements Atom.
A kind of method detecting water quality the most according to claim 1, it is characterised in that described line source comprises hollow the moon
Pole lamp.
A kind of method detecting water quality the most according to claim 1, it is characterised in that described atomizer is NITRATE BY FLAME ATOMIC
Change device.
A kind of method detecting water quality the most according to claim 1, it is characterised in that in step 2, atomic fluorescence is hollow
Cathode modulation, before the outer light path of incidence, first passes through lens focus, it is ensured that fluorescence hollow cathode light signal all reflects through outer light path
Atomic fluorescence hydride generator burner flame it is transmitted to after focusing；With Atomic Absorption common optical pathways in the case of, it is ensured that atom
The energy intensity of fluorescence hollow cathode modulating signal, ensures the measurement sensitivity of atomic fluorescence function.
A kind of method detecting water quality the most according to claim 2, it is characterised in that described hollow cathode lamp group uses can
Rotary lampholder, lamp socket quantity is 8；Described hollow cathode lamp group comprises 2 atomic fluorescence lamp positions, and remaining 6 lamp position is former
Son absorbs hollow cathode lamp position.
A kind of method detecting water quality the most according to claim 1, it is characterised in that in step 2, after adjusting light path
Transmitted light beam passed through and only by a paths in the same time: through described atomizer assembly or glimmering through described atom
Light atomization assembly.
A kind of method detecting water quality the most according to claim 1, it is characterised in that use deuterium lamp correcting mode to disappear
Except the ambient interferences in various complex samples, deuterium lamp is i.e. utilized to send continuous print spectral band absorption background signal；The spectrum of described deuterium lamp
Band broadband is between 0.2～3nm.
8. a multifunctional light spectrometer, it is characterised in that comprise power subsystem, lamp power board, element lamp, outer light path,
Atomizer, monochromator, detector photomultiplier tube (PMT), atomic fluorescence atomization assembly, amplifier, analog-digital converter,
Detection control unit, computer；Described power subsystem is used for as described lamp power board, described analog-digital converter, described inspection
Survey control unit and supply of electric power is provided；Described outer light path comprise dispersion focusing system, reflecting mirror, entrance slit, focusing objective len,
Collimating mirror, grating, described element lamp i.e. hollow cathode lamp；There are two paths in the light that described hollow cathode lamp source sends:
Path one, through described atomizer；The light that described hollow cathode lamp source sends is focused to strip light through the reflection of outer light path
Speckle, transmission is through atomizer flame, and transmission light is reflected mirror and reflects through described entrance slit to described collimating mirror, described collimating mirror
Incident illumination reflection being focused on the parallel compound light belt of formation and exposes to described grating, complex light is divided into collimated monochromatic ligth by described grating,
Again through described focusing objective len, reflection focuses on through slit to described detector photomultiplier tube (PMT), and described photomultiplier transit light pipe will
The optical signal received is converted to analog electrical signal, more acquired partitioned signal collection, analog digital conversion, is uploaded to computer and transports
Calculate display；
Path two, through described atomic fluorescence atomization assembly；The light that described hollow cathode lamp source sends is poly-through the reflection of outer light path
Jiao is strip light spots, and transmission, through atomizer flame, excites hydride generator to generate sample flame through hollow cathode light-illuminating,
Thus produce the characteristic fluorescence signal of sample, the fluorescence optical signals received is converted to analog electrical signal by photomultiplier transit light,
The most acquired partitioned signal collection, analog digital conversion, it is uploaded to computer and carries out computing and show.
A kind of multifunctional light spectrometer the most according to claim 8, it is characterised in that described light-source system comprises two light sources:
One is the hollow cathode lamp for absorbing sample signal, i.e. element lamp；Two is the deuterium lamp for absorbing background signal.
A kind of multifunctional light spectrometer the most according to claim 8, it is characterised in that described hollow cathode lamp group uses can revolve
Turning lamp socket, lamp socket quantity is 8.
11. a kind of multifunctional light spectrometers according to claim 8, it is characterised in that described hollow cathode lamp source sends
Light passed through and only by wherein one of described two paths in the same time, i.e. through described atomizer or through described atom
Fluorescent atom assembly.
12. a kind of multifunctional light spectrometers according to claim 8, it is characterised in that described multifunctional light spectrometer detection one
Element correspondence uses a lamp position；When multiple element is surveyed in detection, correspondence installs and uses multiple lamp position simultaneously.
13. a kind of multifunctional light spectrometers according to claim 8, it is characterised in that described hollow cathode lamp group comprises 2 atoms
Fluorescent lamp position, its 6 lamp positions are Atomic Absorption hollow cathode lamp position.
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| CN108709864A (en) * | 2018-07-09 | 2018-10-26 | 北京普析通用仪器有限责任公司 | A kind of multi-functional atomic spectrometer |
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| DE102018200646A1 (en) * | 2018-01-16 | 2019-07-18 | Berthold Technologies Gmbh & Co. Kg | System for measuring optical properties of samples |
| CN112213288A (en) * | 2020-10-12 | 2021-01-12 | 中国地质科学院水文地质环境地质研究所 | Measuring device for monitoring heavy metal content in underground water environment |
| CN114646626A (en) * | 2022-05-20 | 2022-06-21 | 杭州春来科技有限公司 | Water quality heavy metal detection method and system |
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