Analysing method for organic phosphor pesticide residue of vegetables

A technology of organophosphorus pesticides and an analytical method, which is applied in the field of analyzing organophosphorus pesticide residues in vegetables by using near-infrared spectroscopy technology, and achieves the effects of consistent effect and reduced cost.

Inactive Publication Date: 2005-10-19
深圳市无公害农产品质量监督检验站
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Problems solved by technology

In the international arena, except that Belgium once reported using NIR to analyze the residues of pesticides in seed dressing, and the detection range was 47-347 mg / kg, there were no reports on lower concentrations.

Method used

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  • Analysing method for organic phosphor pesticide residue of vegetables
  • Analysing method for organic phosphor pesticide residue of vegetables
  • Analysing method for organic phosphor pesticide residue of vegetables

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Embodiment Construction

[0049] In order to further understand the present invention, a detailed description will be given below in conjunction with the embodiments and accompanying drawings.

[0050] Now take the pesticide methamidophos as an example to illustrate how to screen and verify the characteristic absorption peaks of phosphorus-containing groups. figure 1 is the NIR spectrum of the methamidophos standard, figure 2 is the NIR second derivative spectrum of methamidophos standard, from figure 2 It can be seen that the substance is at 5241cm -1 There is characteristic absorption. Taking the methamidophos emulsifiable concentrate (industrial product) produced by the pesticide factory as an example for analysis, its product mainly contains three main components, namely solvent methanol, emulsifier and methamidophos, Figure 3-6 are their original and second derivative spectra, respectively. exist image 3 In the original spectrum of methamidophos emulsifiable concentrate contains methanol ...

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Abstract

The analysis of organophosphorus pesticide residue in vegetable includes finding out the characteristic absorption peaks of phosphorous radicals by means of near infrared spectroscopeical screening and verification to establish standard near infrared spectral mathematic model of various kinds of vegetables, acquiring the near infrared spectrogram of vegetable sample, and differential and second derivative treatment with the standard near infrared spectral mathematic model to judge whether to exist organophosphorus pesticide residue in the vegetable. The present invention detects the organophosphorus pesticide residue in the vegetable through only detecting the near infrared spectrogram of vegetable sample in 3-5 min.

Description

technical field [0001] The invention relates to an analysis method for organophosphorus pesticide residues, in particular to a method for analyzing organophosphorus pesticide residues in vegetables by using near-infrared spectrum technology. Background technique [0002] For the determination of pesticide residues in vegetables, the classic method in the prior art is usually gas chromatography or gas chromatography-mass spectrometry (GC-MS) method. In recent years, the enzyme inhibition method is also recommended. Although the detection speed of the enzyme inhibition method is fast, the accuracy is low and it is interfered by many factors. However, gas chromatography-mass chromatography-mass spectrometry and other detection methods have high accuracy, but the instruments are expensive, the sample preparation process is complicated, the analysis time is long, there are many steps, various auxiliary equipment are required, and a large amount of chemical reagents are consumed. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G01N21/359G06F19/00
Inventor 周向阳金同铭胡祥娜林纯忠
Owner 深圳市无公害农产品质量监督检验站
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