A purification sheet used for pretreatment of rapid determination of pesticide residues

Abstract

The invention discloses a purification sheet for processing pesticide residues before fast detection, wherein the purification sheet comprises an upper carrier and a lower carrier, an adsorbent is fixed between the carriers, and the purification sheet further contains a plant secondary metabolite inhibitor. The purification sheet can effectively remove pigments in a vegetable sample and inhibit the influence of a secondary metabolite on an enzyme, thereby avoiding the influence of the pigments and the secondary metabolite on the detection of the pesticide residues and improving the detection accuracy.

Description

technical field [0001] The invention relates to the field of pesticide residue detection, in particular to a device for pretreatment of pesticide residue rapid test samples, in particular to a purification sheet for pretreatment of pesticide residue rapid test samples. Background technique [0002] The application of pesticides and the emergence of pest resistance in the process of vegetable cultivation have increased the toxicity and usage of pesticides, and the types of pesticides have increased. Pesticide residues in vegetables are becoming more and more common. In order to ensure people's food safety, it is very necessary to carry out rapid detection of pesticide residues on vegetables. [0003] At present, the pesticides used in vegetables are mainly organophosphorus, carbamate and pyrethroid pesticides, and the national standard GB / T 5009.199-2003 of the enzyme inhibition rate method as the current vegetable detection standard and the " Rapid detection of trichlorfon...

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Problems solved by technology

[0005] At present, the pretreatment of vegetable samples mainly uses a mixed solid-phase extraction adsorbent composed of graphitized carbon black and amino fillers to remove pigments, organic acids, phenols and other interfering substances in the sample. This mixed filler is usually not easy to recycle. , the price is high, and there are generally disadvantages such as cumbersome operation, time-consuming and labor-intensive use, while CN104062384A uses magnetic carbon nanotubes to remove impurities in the sample, but the pure magnetic material has limited ability to remove impurities, and its surface needs to be modified , but the modification method is complex and the cost of carbon nanotubes is high, which is not conducive to large-scale use

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