CN103115910A - Method for quickly identifying types of edible vegetable oil by two-dimensional fluorescence spectrum technology - Google Patents
Method for quickly identifying types of edible vegetable oil by two-dimensional fluorescence spectrum technology Download PDFInfo
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Abstract
The invention relates to a method for quickly identifying the types of edible vegetable oil by a two-dimensional fluorescence spectrum technology, which relates to the technical field of quick non-destructive analysis with spectroscopy. The problem of peak overlap of fluorescence spectra can be well solved by virtue of combination of two-dimensional correlation and the fluorescence spectrum technology, so that the difference of grease spectrograms can be more remarkable and intuitive. The method adopts polarized disturbance, namely selects a polarized angle as external disturbance, so that the defect that a test costs time and labor when a temperature is taken as external disturbance traditionally can be overcome. The method comprises the following steps of: (1) collecting a dynamic spectrum; (2) drawing a two-dimensional correlated spectrum; and (3) comparing and analyzing spectrograms. The method can be applied to quick identification of the types of edible vegetable oil, and has the advantages of low detection cost, short analysis time and non-destructive detection.
Description
Technical field
The present invention relates to utilize spectroscopy to can't harm the express-analysis technical field, particularly relate to a kind of method that two-dimensional fluorescence spectrum technology is differentiated the edible vegetable oil kind fast.
Background technology
Edible vegetable oil provides good pleasure of the senses and the necessary fatty acid of body development for people, and its security is more and more paid close attention to.The difficulty that nutrition between different edible vegetable oils and price variance and edible vegetable oil kind are differentiated makes the lawless person carry out each vegetable oil doping behavior for reaping staggering profits, serious harm consumer's rights and interests.Therefore the research of edible vegetable oil kind discrimination method is that theoretical meaning and practical value are arranged very much.
Of a great variety to the method for edible oil kind discriminating at present, can be divided into physics and chemistry method, chromatography, nuclear magnetic resonance spectroscopy and spectroscopic methodology.Fluorescence spectroscopy technique has the advantages such as highly sensitive, that selectivity is strong, sample size is few as a kind of of spectroscopic methodology, but the deficiency that its peak overlap is serious, bands of a spectrum are wider has also been brought certain limitation for it in edible vegetable oil discriminating field.
The key concept of two-dimensional correlation analysis is proposed in nuclear magnetic resonance (NMR) field by Richard's Ernest ﹠ Whitney before 30 years the earliest.The two-dimensional nucleus magnetic spectrum is by multiple-pulse technology excited nucleus spin, and on the acquisition time territory, the deamplification of nuclear spin relaxation process, obtain through double Fourier transformation.Until 1986, Japanization scholar Isao Noda (wild Tian Yongfu) has proposed a conceptual breakthrough with regard to the theory of two dimensional NMR techniques, he regards the multiple radio frequency excitation technology in the nuclear-magnetism experiment as a kind of external disturbance to system, simplifies with this brand-new visual angle and treats the two-dimensional nucleus magnetic technology.Noda in 1989 acts on the perturbation (being initially the sinusoidal waveform low-frequency excitation) of certain forms on the sample system and makes sample excitation, this low-frequency perturbation action is on sample, by measuring a series of infrared vibration dynamic spectrum, and utilize mathematical Correlation Analysis Technique to carry out correlation analysis to infrared signal to obtain the two-dimensional correlation infrared spectrum spectrogram, initial two-dimensional infrared correlation technique that Here it is is theoretical.1993, Isao Noda has proposed again broad sense two-dimensional infrared correlation spectrum (generalized two-Dimensional correlation spectroscopy) concept, outside perturbation is extended to any form that can cause spectral signal to change from sine-shaped low-frequency excitation, as: temperature, concentration, pressure, reaction time, magnetic field etc.Thereby the two-dimensional correlation analytical technology is generalized near infrared spectrum, Raman spectrum and fluorescence spectrum etc. from common infrared spectrum.
The two-dimensional correlation spectra analysis comprises sync correlation spectral analysis and asynchronous correlation spectrum analysis.The sync correlation spectral intensity characterizes the collaborative degree between two Dynamic Signals, when two dynamic change homophases (anti-phase), is worth for just (bearing); When two dynamic change quadratures, value is zero.And asynchronous correlation spectrum intensity characterizes the different degree between two Dynamic Signals.When two Dynamic Signals were orthogonal, value can just can be born; And when two Dynamic Signal homophases or anti-phase duration be zero.
Sync correlation spectrum wherein is positioned at the automatic peak that is on principal diagonal about the principal diagonal symmetry, obtains by Dynamic Signal self is relevant, and its intensity has represented the sensitivity that system is externally disturbed.The peak that is positioned at non-principal diagonal position is called the intersection peak, and the existence at peak of intersecting may mean that the variation at two peaks has common mechanism and origin.Asynchronous correlation spectrum is the principal diagonal antisymmetry, only forms by intersecting the peak.Asynchronous intersection peak shows that there is relative acceleration in the Strength Changes of two spectrum peaks.This specific character can be distinguished the different peak of origin that overlaps.Referring to the 21-23 page in " Two-dimensional Correlation Spectroscopy-Applications in Vibrational and Optical Spectroscopy ".
Due on the one dimension fluorescence spectrum, what occur is all that the peak type is single, the unconspicuous simple type of peak position " steamed bun peak ", a lot of fluorescence information all lie among its main peak, make the parsing of fluorescence spectrum very difficult, some trickle fluorescence information can't directly be extracted, thereby has limited the application of fluorescent spectroscopy technology.A two-dimensional correlation minute technology is incorporated into fluorescent spectroscopy, it is expanded overlap peak third dimension direction (outside disturb direction) is upper, can effectively improve the spectra resolution rate like this, the even original concealed small peak of overlap peak is clearly shown, can reflect clearly the sample system under extraneous perturbation, then each structural unit, functional group change that relaxation returns to initial precedence relationship in molecule.This technology has been used report to some extent in fluorescence spectrum, verified that based on the two-dimensional correlation fluorescence spectrum of fluorescent quenching disturbance two outstanding spectrum peaks in the humic acid fluorescence spectrum come from the different fluorescent materials in humic acid such as the U.S. utilization such as good in middle island.Huang Kun etc. utilize two-dimensional correlation spectra to survey the fluorescence energy transfer phenomenon, have the energy transmission between the fluorescent emission of having verified Eu3+ and Nd3+ and absorption.Sun Yanhui etc. utilize two-dimentional synchronous fluorescent spectrum correlation analysis to obtain the strong variation order in each peak in the tyrosine oxidizing process of utilizing fluorescent spectrometry research hydroxyl radical free radical to induce.
difficulty and complicacy due to the edible vegetable oil discriminating, the two-dimensional correlation fluorescence analysis is used can bring into play the speciality (singularity) of this technology more in the attributional analysis of edible vegetable oil, and the special case by the edible vegetable oil attributional analysis, the analysis of two-dimensional Correlation Analysis Technique is in the common problem of the component detection with fluorescent effect of complex system, explain and sum up the problem in science of fluorescence production and cancellation mechanism and general character, set up the method for the use two-dimensional correlation fluorescent spectroscopy technology in food and agricultural product quality express-analysis, for the development of this technology and the application in relevant industries provide valuable experience and method.
And adopt when utilizing two-dimensional correlation outside the polarization angle conduct and disturb, disturb outward with traditional temperature and compare, it has saved a large amount of test periods, and is easier to operation.
Summary of the invention
The invention provides a kind of method of differentiating fast the edible vegetable oil kind based on the two-dimensional fluorescence spectrum technology under polarization scrambling, overcome the serious deficiency of conventional fluorescent spectrum peak overlap, and take polarization angle as outside disturb also to have overcome and disturb deficiency consuming time outside time-based and temperature, can realize that simply the discriminating of vegetable oil kind detects by quick nondestructive.
The technical solution adopted in the present invention: a kind of two-dimensional fluorescence spectrum technology is differentiated the method for edible vegetable oil kind fast, carries out according to following step:
(1) dynamic spectrum collection: the common luminoscope of selecting the fluorescence polarization instrument or adding polaroid obtains a series of polarization fluorescence spectras of same plant oil as dynamic spectrum as the spectra collection instrument by changing polarization angle;
(2) the two-dimensional correlation collection of illustrative plates is drawn: utilize the two-dimensional correlation principle, dynamic spectrum is carried out correlation analysis, draw two-dimensional correlation collection of illustrative plates and automatic peak intensity spectrum,
(3) two-dimensional map comparative analysis: by two-dimensional correlation figure is composed binding analysis with automatic peak intensity, more different vegetable oil X-Y schemes are composed the peak situation, realize the discriminating fast directly perceived to different vegetable oil.
Polarization angle is selected a monotony interval, adds polaroid as example take selected instrument as common luminoscope.
The wherein described dynamic spectrum collection of step (1), polaroid both can be added on place's (between light source and sample cell) and analyzing place (between sample cell and detecting device) partially simultaneously, also can only add one; When changing angle, only need to change polarizing angle or analyzing angle.
The wherein described dynamic spectrum collection of step (1), as inaccurate in angle that polaroid indicates, before gathering, test needs to do preliminary experiment, seek monotony interval.
The wherein described dynamic spectrum collection of step (1), in the interval, polarization angle uniformly-spaced scans fluorescence spectrum, consists of dynamic spectrum.
Wherein in step (2), two-dimentional spectrogram adopts level line collection of illustrative plates form to draw.
What wherein the different vegetable oil X-Y schemes described in step (3) composed that the peak situation refers to relevant peaks goes out peak number order, position and intensity.
Wherein step (3) spectrogram comparative analysis, the peak intensity spectrum can show more clearly that than two-dimentional sync correlation figure automatic peak goes out the peak situation automatically.One of can be used as the two-dimensional correlation map analysis when carrying out spectrum analysis is strong auxiliary.
Wherein step (3) spectrogram comparative analysis, the selection of level line parameter when drawing two-dimensional map, unsuitable excessive or too small, cross conference and cause collection of illustrative plates too lengthy and jumbled, too small artificially between drop-out so that spectrogram otherness not remarkable.
Compared with prior art, the invention has the beneficial effects as follows:
1) compare with the conventional fluorescent spectroscopic methodology, the fluorescence two-dimensional correlated spectroscopy is extended to two-dimensional space with fluorescence signal by the one-dimensional space, greatly improve the resolution of fluorescence spectrum and can highlight fluorescence signal intensity in two-dimensional space, distinguish in one dimension figure peak a little less than capped small peak, and then expand fluorescence difference between various edible vegetable oils, realize the visual of fluorescence spectrum difference.
2) with traditional disturb to compare based on temperature outer adopt polarization angle to simplify process of the test for disturbing outward, saved test period.
Description of drawings
Fig. 1 is the strong and polarization angle graph of a relation in peak, 674nm place, and wherein polarization angle is X-axis, the peak is Y-axis by force, has shown that the peak is by force with the variation tendency of polarization angle.
Fig. 2 is rapeseed oil every 10 ° of equidistant adjusting angles and scan fluorescence spectrum in selected interval, obtains 10 spectral composition dynamic optical spectrograms and namely is followed successively by from top to bottom the rapeseed oil fluorescence spectrum that scanning obtains during every 10 ° of equidistant adjusting angles in polarization angle 60-150 °.
Fig. 3 is the two-dimensional correlation collection of illustrative plates of rapeseed oil, wherein a: the two-dimensional correlation synchronization scheme; B: the asynchronous figure of two-dimensional correlation, wherein two-dimensional correlation collection of illustrative plates level line parameter is 64.
Fig. 4 is the two-dimensional correlation collection of illustrative plates of olive oil, wherein a: the two-dimensional correlation synchronization scheme; B: the asynchronous figure of two-dimensional correlation, wherein two-dimensional correlation collection of illustrative plates level line parameter is 64.
Fig. 5 is the automatic peak intensity spectrum of rapeseed oil and olive oil.
Embodiment
Embodiment
Utilize in present embodiment based on the two-dimensional fluorescence spectrum under polarization scrambling and differentiate that fast the use vegetable oil kind realizes by following steps:
1) dynamic spectrum collection: the common luminoscope of selecting the fluorescence polarization instrument or adding polaroid obtains a series of fluorescence spectrums of same plant oil as dynamic spectrum as the spectra collection instrument by changing polarization angle.
2) the two-dimensional correlation collection of illustrative plates is drawn: utilize the two-dimensional correlation principle, dynamic spectrum is carried out correlation analysis, draw two-dimensional correlation collection of illustrative plates and automatic peak intensity spectrum, two-dimentional spectrogram adopts level line collection of illustrative plates form.
3) two-dimensional map comparative analysis: by with two-dimensional correlation figure and automatic peak intensity spectrum binding analysis, more different vegetable oil X-Y schemes are composed peak situation (relevant peaks go out peak number order, position, intensity etc.), realize the directly perceived of different vegetable oil differentiated fast.
Described dynamic spectrum collection and spectrum analysis:
Dynamic spectrum gathers:
Polarization angle is selected a monotony interval, adds polaroid as example take selected instrument as common luminoscope.
1) polaroid both can be added on place's (between light source and sample cell) and analyzing place (between sample cell and detecting device) partially simultaneously, also can only add one.When changing angle, only need to change polarizing angle or analyzing angle.
2) as inaccurate in angle that polaroid indicates, before gathering, test needs to do preliminary experiment, seek monotony interval.
3) in the interval, polarization angle uniformly-spaced scans fluorescence spectrum, consists of dynamic spectrum.
The spectrogram comparative analysis:
1) the peak intensity spectrum can show more clearly that than two-dimentional sync correlation figure automatic peak goes out the peak situation automatically.One of can be used as the two-dimensional correlation map analysis when carrying out spectrum analysis is strong auxiliary.
The selection of level line parameter when 2) drawing the two-dimensional correlation collection of illustrative plates, unsuitable excessive or too small, cross conference and cause collection of illustrative plates too lengthy and jumbled, too small artificially between drop-out so that spectrogram otherness not remarkable.
Take olive oil, rapeseed oil as example, device therefor is the common luminoscope F96S of interpolation polaroid (indicating the number of degrees inaccurate), and polaroid makes an addition to analyzing place.Selecting excitation wavelength is 405nm.A kind of two-dimensional fluorescence spectrum technology differentiates that fast the concrete steps of the method for edible vegetable oil kind are:
1) select between the perturbing area.
With polaroid uniformly-spaced every 10 ° gather a spectrum, totally 36.And be figure to go out the strong and angle in peak, 674nm place, peak position, get Fig. 1.By can clearly seeing to there emerged a monotony interval in Fig. 1, in example, menu is transferred and is successively decreased interval 60-150 ° as between the perturbing area.
2) scanning dynamic spectrum.
Every 10 ° of equidistant adjusting angles and scan fluorescence spectrum in selected interval obtain 10 spectral composition dynamic spectrums, as Fig. 2.
3) draw the two-dimensional correlation collection of illustrative plates, and carry out comparative analysis.
Fig. 3, Fig. 4 and Fig. 5 are respectively two-dimensional correlation collection of illustrative plates and the automatic peak intensity spectrum of rapeseed oil and olive oil, and collection of illustrative plates level line parameter is 64, wherein a: the two-dimensional correlation synchronization scheme; B: the asynchronous figure of two-dimensional correlation.As can be seen from the figure rapeseed oil is extremely similar with olive oil automatic peak, compare with synchronization scheme automatic peak intensity spectrum shown more clearly automatic peak go out peak information and between the two automatic peak go out peak position difference, the master of rapeseed oil automatic peak at 676nm and rapeseed oil at 674nm.
Relatively both two-dimensional correlation spectrograms, between synchronization scheme, can visually see, and except automatic peak, there is a drops relevant peaks in rapeseed oil, is positioned at (676,523).Both asynchronous figure differences are more obvious.Rapeseed oil relevant peaks in (650-750,650-750) zone is more mixed and disorderly than olive oil, and the limit is unintelligible.Other regional relevant peaks distribute also not identical, and the larger relevant peaks of another of rapeseed oil is positioned at (677,524), and olive oil is positioned at (674,395).
Claims (8)
1. a two-dimensional fluorescence spectrum technology is differentiated the method for edible vegetable oil kind fast, it is characterized in that carrying out according to following step:
(1) dynamic spectrum collection: the common luminoscope of selecting the fluorescence polarization instrument or adding polaroid obtains a series of polarization fluorescence spectras of same plant oil as dynamic spectrum as the spectra collection instrument by changing polarization angle;
(2) the two-dimensional correlation collection of illustrative plates is drawn: utilize the two-dimensional correlation principle, dynamic spectrum is carried out correlation analysis, draw two-dimensional correlation collection of illustrative plates and automatic peak intensity spectrum,
(3) two-dimensional map comparative analysis: by two-dimensional correlation figure is composed binding analysis with automatic peak intensity, more different vegetable oil X-Y schemes are composed the peak situation, realize the discriminating fast directly perceived to different vegetable oil.
2. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that the wherein described dynamic spectrum collection of step (1), polaroid has been added on simultaneously and has partially located is between light source and sample cell and analyzing place is between sample cell and detecting device, perhaps only adds one; When changing angle, only need to change polarizing angle or analyzing angle.
3. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that the wherein described dynamic spectrum collection of step (1), as inaccurate in angle that polaroid indicates, before gathering, test needs to do preliminary experiment, seek monotony interval.
4. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that the wherein described dynamic spectrum collection of step (1), in the interval, polarization angle interval scan fluorescence spectrum consists of dynamic spectrum.
5. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that wherein in step (2), two-dimentional spectrogram adopts level line collection of illustrative plates form to draw.
6. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, and what it is characterized in that different vegetable oil X-Y schemes described in step (3) wherein compose that the peak situation refers to relevant peaks goes out peak number order, position and intensity.
7. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that wherein step (3) spectrogram comparative analysis, the peak intensity spectrum can show more clearly that than two-dimentional sync correlation figure automatic peak goes out the peak situation automatically; One of can be used as the two-dimensional correlation map analysis when carrying out spectrum analysis is strong auxiliary.
8. a kind of two-dimensional fluorescence spectrum technology according to claim 1 is differentiated the method for edible vegetable oil kind fast, it is characterized in that wherein step (3) spectrogram comparative analysis, the selection of level line parameter when drawing two-dimensional map, unsuitable excessive or too small, cross conference and cause collection of illustrative plates too lengthy and jumbled, too small artificially between drop-out so that spectrogram otherness not remarkable.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092549A (en) * | 2015-07-28 | 2015-11-25 | 江苏大学 | Extraction method for fluorescence spectrum information |
| CN105844646B (en) * | 2016-04-01 | 2019-04-05 | 广西科技大学 | Spectral mixture consistency checking method |
| CN110174392A (en) * | 2019-06-21 | 2019-08-27 | 大连海事大学 | A kind of dactylogram building of high sense multi-component complex oil product and discrimination method |
| CN110376173A (en) * | 2019-07-30 | 2019-10-25 | 中国农业科学院都市农业研究所 | A kind of method for quick identification of edible oil component content |
| CN110398472A (en) * | 2019-06-28 | 2019-11-01 | 天津大学 | A kind of vegetable oil identification classification method based on two-dimensional correlation spectra quantization |
| CN111257305A (en) * | 2020-03-31 | 2020-06-09 | 北京农业智能装备技术研究中心 | Two-dimensional correlation LIBS spectral measurement method, system and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1755129A1 (en) * | 1990-02-20 | 1992-08-15 | Специальное Конструкторское Бюро Ан Эстонии | Method for diagnostics of oil pollutions of water areas |
| JPH0572179A (en) * | 1991-09-10 | 1993-03-23 | Hitachi Ltd | Detecting device for two-dimensional fluorescent image of nucleic acid and protein |
| CN102183500A (en) * | 2011-02-28 | 2011-09-14 | 江南大学 | White spirit identification method based on fluorescence characteristic parameter Euclidean distance |
| CN102841070A (en) * | 2011-06-23 | 2012-12-26 | 中国石油化工股份有限公司 | Method for identifying types of crude oil by using two-dimensional correlation infrared synchronization spectrum |
| CN102841071A (en) * | 2011-06-23 | 2012-12-26 | 中国石油化工股份有限公司 | Method for identifying types of crude oil by using two-dimensional correlation infrared asynchronization spectrum |
-
2013
- 2013-02-25 CN CN201310058510XA patent/CN103115910A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1755129A1 (en) * | 1990-02-20 | 1992-08-15 | Специальное Конструкторское Бюро Ан Эстонии | Method for diagnostics of oil pollutions of water areas |
| JPH0572179A (en) * | 1991-09-10 | 1993-03-23 | Hitachi Ltd | Detecting device for two-dimensional fluorescent image of nucleic acid and protein |
| CN102183500A (en) * | 2011-02-28 | 2011-09-14 | 江南大学 | White spirit identification method based on fluorescence characteristic parameter Euclidean distance |
| CN102841070A (en) * | 2011-06-23 | 2012-12-26 | 中国石油化工股份有限公司 | Method for identifying types of crude oil by using two-dimensional correlation infrared synchronization spectrum |
| CN102841071A (en) * | 2011-06-23 | 2012-12-26 | 中国石油化工股份有限公司 | Method for identifying types of crude oil by using two-dimensional correlation infrared asynchronization spectrum |
Non-Patent Citations (2)
| Title |
|---|
| KENICHI NAKASHIMA ET AL: "Two-dimensional correlation fluorescence spectroscopy V：Polarization perturbation as a new technique to induce intensity changes in fluorescence spectra", 《JOURNAL OF MOLECULAR STRUCTURE》 * |
| 田萍等: "二维相关荧光光谱鉴别4种食用植物油种类的研究", 《食品安全质量检测学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092549A (en) * | 2015-07-28 | 2015-11-25 | 江苏大学 | Extraction method for fluorescence spectrum information |
| CN105092549B (en) * | 2015-07-28 | 2017-11-17 | 江苏大学 | A kind of extracting method of fluorescence spectrum information |
| CN105844646B (en) * | 2016-04-01 | 2019-04-05 | 广西科技大学 | Spectral mixture consistency checking method |
| CN110174392A (en) * | 2019-06-21 | 2019-08-27 | 大连海事大学 | A kind of dactylogram building of high sense multi-component complex oil product and discrimination method |
| CN110174392B (en) * | 2019-06-21 | 2021-08-31 | 大连海事大学 | Fingerprint spectrum construction and identification method of high-identification-capacity multi-component complex oil product |
| CN110398472A (en) * | 2019-06-28 | 2019-11-01 | 天津大学 | A kind of vegetable oil identification classification method based on two-dimensional correlation spectra quantization |
| CN110376173A (en) * | 2019-07-30 | 2019-10-25 | 中国农业科学院都市农业研究所 | A kind of method for quick identification of edible oil component content |
| CN111257305A (en) * | 2020-03-31 | 2020-06-09 | 北京农业智能装备技术研究中心 | Two-dimensional correlation LIBS spectral measurement method, system and device |
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Application publication date: 20130522 |