Similarity detection method for chromatographic fingerprint spectrogram

A determination method and technology of fingerprint spectrum, which is applied in the field of similarity determination of chromatographic fingerprint spectrum, can solve the problems of manual operation, time-consuming and laborious, low precision, etc., and achieve the effects of high precision, easy operation and easy learning, and simple calculation

Inactive Publication Date: 2012-06-20
ZHEJIANG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of manual operation, time-consuming and labor-intensive, and low precision when measuring the similarity of the existing chromatographic fingerprint technology, the present invention provides an automatic measurement, simple and convenient, and high-precision chromatographic fingerprint similarity measurement method

Method used

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  • Similarity detection method for chromatographic fingerprint spectrogram
  • Similarity detection method for chromatographic fingerprint spectrogram
  • Similarity detection method for chromatographic fingerprint spectrogram

Examples

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example 1

[0037] Example 1: The assay method of polymer standard spectrogram.

[0038] Determination conditions of the polymer standard substance of this example

[0039] 1.1 Experimental materials

[0040] The experimental materials used in this experiment include polypropylene, polyethylene, polyethylene wax, polyamide, ethylene-acetic acid, ethylene-acrylic acid, ethylene octene copolymer, styrene / butadiene (30% / 70%) polymer standard

[0041] 1.2 Experimental Instruments

[0042] CP3800 gas chromatography instrument (Varian company, USA)

[0043] Py-2020iD Cracker (Frontier, Japan)

[0044] 1.3 Experimental method

[0045] 1.3.1 Pyrolysis gas chromatography:

[0046] Common PY-GC / MS instrument device diagram The detection system device diagram consists of a cracker and gas chromatography or GC-MS. Usually put the sample into the sample cup, fix the sample cup on the sample rod, put it into the cracker, and react at 200-700°C under the protection of nitrogen or helium. The crac...

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Abstract

A similarity detection method for a chromatographic fingerprint spectrogram includes the following steps: 1 building a polymer standard substance cracking spectrogram base: adopting a cracking gas chromatograph to detect a serial of high polymer standard samples, ruling that spectrum conditions used in each sample detection need to be identical with spectrum conditions used in detection of high polymer standard samples, and forming the polymer standard substance cracking spectrogram base by importing detected experimental data; and 2 matching with actual samples: A firstly choosing to add a current spectrogram, entering actually detected sample data for temporary storing, and leading reservation time of the entered data to be correctable; B choosing a standard spectrogram base to be compared, choosing one or several spectrogram bases to be compared with actually detected samples according to previously built spectrogram bases, and calculating similarity s through cosine of included angles. The similarity detection method for the chromatographic fingerprint spectrogram performs measurement automatically, is simple, convenient and high in accuracy.

Description

technical field [0001] The invention relates to a method for measuring the similarity of chromatographic fingerprints. Background technique [0002] The chemical composition of the chromatographic fingerprint is often very complex, and it is difficult to make an effective judgment on its quality as a whole through qualitative and quantitative analysis of one or several chemical compositions. [0003] The pyrolysis-gas phase device is composed of a cracker and a gas chromatograph. This instrument is used in the detection of polymers, and the equipment is simple and easy to operate. When measuring the sample, the sample is heated and sintered by a preliminary alcohol lamp to remove impurities, put it into the sample cup, fix the sample cup on the sample rod, put it into the cracker, and generate it at 200-700°C under the protection of nitrogen or helium. cleavage reaction. The cracked product is carried by the carrier gas into the capillary column of gas chromatography for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/86
Inventor 王丽丽孙杨潘再法陈德君
Owner ZHEJIANG UNIV OF TECH
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