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Method for detecting nine organophosphorus pesticides simultaneously

A technology of organophosphorus pesticides and dimethoxythiophosphoryl aminobutyric acid is applied in chemical instruments and methods, measuring devices, material separation and other directions, and can solve the problems of cumbersome pretreatment, expensive instruments, long detection time and the like , to achieve the effect of low cost, high sensitivity, and avoiding the pretreatment process

Inactive Publication Date: 2014-08-06
SHANDONG AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of long detection time, expensive equipment, cumbersome pretreatment and other defects in the traditional organophosphorus pesticide detection method, and provide a method for simultaneously detecting nine kinds of organophosphorus pesticides, specifically using a molecular imprinted matrix Simultaneous detection of nine organophosphorus pesticides (trichlorfon, methamidophos, acephate, omethoate, monocrotophos, dimethoate, phosphamide, methylparathion, malathion) method

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  • Method for detecting nine organophosphorus pesticides simultaneously

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Embodiment Construction

[0018] Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, not limiting, can not limit protection scope of the present invention with following embodiment.

[0019] The invention combines molecular imprinted solid-phase extraction technology with gas chromatography to establish a highly sensitive detection method for trichlorfon and monocrotophos. Its specific embodiment is:

[0020] 1. Preparation of molecularly imprinted polymers with multiple recognition sites:

[0021] Weigh 10mmoL of 4-aminobutyric acid in 10mL2.5mol L -1 In NaOH solution, stir in an ice bath for 30 min. Add 1.215mL of o,o-dimethylphosphorylthiochloride dropwise into the flask and stir for a while. Then adjust the pH to 10, continue stirring at room temperature for 6 h, and wash the impurities in the mixture with ethyl acetate. The pH was then adjusted to 2.0 and the mixture was extracted with ethyl acetate. Dry and filter. Ethyl ac...

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Abstract

The invention relates to a method for detecting nine organophosphorus pesticides simultaneously. The method for detecting nine organophosphorus pesticides simultaneously comprises the following steps: preparing multi-recognition-site molecularly imprinted polymers, and establishing a molecularly imprinted matrix solid-phase dispersion extraction and gas chromatography combination system. Nine molecularly imprinted polymers, including dipterex, with high selection recognition performance act as adsorption functional materials, and the defects of sole recognition of traditional molecularly imprinted polymers and the like are prevented; the molecularly imprinted matrix solid-phase dispersion extraction and the gas chromatography are combined, and then the rapid and flexible detection method with a wide detection range to nine trace organophosphorus pesticides including dipterex is established. The method for detecting nine organophosphorus pesticides simultaneously provided by the invention is low in cost, simple in experiment operation and high in flexibility, and is suitable for the rapid detection on nine trace organophosphorus pesticides including dipterex in various products.

Description

technical field [0001] The invention relates to a method for simultaneously detecting multiple organophosphorus pesticides, belonging to the technical field of food safety detection. Background technique [0002] Organophosphorus pesticides are widely used because of their unstable chemical properties, easy decomposition, short half-life, and difficult accumulation in crops, animals and humans. However, because organophosphorus is used more widely, more frequently, and more frequently, it has become the most serious food-contaminating pesticide [1]. A large number of organophosphorus pesticide residues exceeding the standard not only pollute agricultural products and the ecological environment, but also endanger human health and life safety. Long-term consumption of agricultural products with trace amounts of organophosphorus pesticide residues exceeding the standard may cause chronic poisoning in humans, lead to the occurrence of diseases, and even affect the next generati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02B01J20/26B01J20/30
Inventor 徐志祥王玺龙赵涛
Owner SHANDONG AGRICULTURAL UNIVERSITY
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