Detection apparatus and method for pesticide residues in vegetable based on near infrared, fluorescence and polarization multi-spectrum

A technology for pesticide residue detection and fluorescence spectroscopy, which is applied in the field of non-destructive detection of pesticide residues in agricultural products, can solve the problems of cumbersome processing, unfavorable promotion and application, and time-consuming, so as to enrich light wave information, expand the effective spectral band range, and improve effectiveness. and divisibility effects

Inactive Publication Date: 2015-08-26
JIANGSU UNIV
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Problems solved by technology

Although there are relatively mature test methods for the detection of organophosphorus pesticide residues at present, such as chemical rapid detection, immunoassay, instrumental analysis (gas chromatography (GC), liquid chromatography (HPLC)), electronic sensitive detection Alth

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  • Detection apparatus and method for pesticide residues in vegetable based on near infrared, fluorescence and polarization multi-spectrum

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Embodiment Construction

[0032] Theoretical basis of the present invention is:

[0033] (1) Comprehensive consideration of near-infrared spectroscopy and fluorescence spectroscopy to distinguish the types of organophosphorus pesticide residues

[0034] There are many types of organophosphorus pesticides, and the toxicity of each pesticide is different, and the maximum amount of pesticide residues stipulated by the state is also different. Therefore, it is necessary to clarify the types of pesticide residues when testing pesticide residues. As mentioned in the above problems, commonly used organophosphorus pesticides (dichlorvos, trichlorfon, dimethoate, phoxim, fenitrothion, quetiaphos, diazinon, chlorpyrifos, fenthion, methamidophos, Among acephate, phorate, methapon, parathion, and malathion), most of them can be distinguished by near-infrared spectroscopy according to different phosphorus-containing groups, but those with the same phosphorus-containing group Two kinds of pesticides, which cannot b...

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Abstract

The invention discloses a detection apparatus and method for pesticide residues in vegetable based on near infrared, fluorescence and polarization multi-spectrum. An electric control light source rocking arm and an electric control detection rocking arm are respectively fixed at two sides of the upper end of an electric control translation stage; the upper part of an electric control sample bench is used for placing a sample, and the lower part of the electric control sample bench is fixed on the electric control translation stage; an information acquisition unit comprises a halogen light source, an ultraviolet source, a multi-source spectrometer sensor assembly and a data acquisition card; a pesticide residue detection control device comprises a computer, a control module and a mode switch key; and the control module is connected with the computer, the data acquisition card and the mode switch key. The method provided by the invention makes a breakthrough to bottlenecks restricting traditional nondestructive detection technology in high-precision detection of pesticide residues and has the advantages of universality and accuracy. The varieties and contents of organophosphorus pesticide residues can be effectively distinguished based on corresponding near infrared spectral sensitive band, fluorescence spectral sensitive band, polarization angle combination and sensitive spectral band of each organophosphorus pesticide residue.

Description

technical field [0001] The invention relates to non-destructive detection of pesticide residues in agricultural products, in particular to a method and device for non-destructive detection of types and contents of pesticide residues in vegetables by using near-infrared, fluorescence and polarization spectrum technologies. technical background [0002] Vegetables are an important source of essential vitamins and minerals for the human body, and are an essential food for people to eat nutritiously. In vegetable cultivation, the application of pesticides for pest control is an essential link. The degradation period of organophosphorus pesticides is 10-14 days after spraying, but many vegetables enter the consumption field ahead of time, and there are still some difficult-to-decompose residues in the vegetables at this time. In recent years, food poisoning incidents caused by pesticide residues have been frequently reported. For example, in 2006, the poisonous lettuce of the Ta...

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Application Information

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IPC IPC(8): G01N21/21G01N21/25G01N21/64
Inventor 孙俊路心资武小红毛罕平李青林张晓东朱文静倪纪恒孔庆镇
Owner JIANGSU UNIV
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