Method for measuring residues of ethephon, thidiazuron and diuron in cotton by using liquid chromatography tandem mass spectrometry

Abstract

The invention relates to a method for measuring residues of ethephon, thidiazuron and diuron in cotton by using liquid chromatography tandem mass spectrometry. The method comprises the following steps: (1) processing a sample; (2) measuring; (3) judging, i.e., drawing a five-point standard working curve by taking mass concentration X as an abscissa and peak area Y as an ordinate, and quantifying the sample by using the standard working curve, wherein the response value of a medicament in the sample solution is required to be within the linear range detected by the instrument. The method is simple, convenient, quick and accurate, each item of technical index meets the requirements of domestic and international rules, and the method can be used for quantitative detection of the ethephon, the thidiazuron and the diuron in the cotton sample.

Description

technical field [0001] The invention relates to a method for determining pesticide residues in cotton, in particular to a method for determining residual amounts of ethephon, thiadizuron and diuron in cotton by liquid chromatography tandem mass spectrometry. Background technique [0002] With the continuous improvement of living standards, people's consumption concepts are also constantly improving. In terms of clothing, it must not only be warm, but also beautiful, and at the same time be safe and healthy. Different pesticides must be used in different stages of cotton production to prevent pests and weeds growth, which will affect the yield and quality of cotton fiber if not controlled. Although most of the pesticides in textiles are removed during the processing and production process, some pesticides still remain in the textiles. These pesticides are absorbed by the human body during the contact with human skin, which will cause toxic and side effects to the human body....

AI Technical Summary

Problems solved by technology

With the development of liquid chromatography tandem mass spectrometry technology becoming more and more mature, this method is more and more applied to the determination and confirmation of pesticide residues in textiles and food. The above method uses liquid chromatography tandem mass spectrometry to determine ethephon in fruits, but Thididiuron and Diuron were not determined at the same time. At the same time, 20mM acetate buffer solution was used in the mobile phase, and the solution was prone to produce flocculent precipitates to block the mobile phase filter head, and the method had poor reproducibility

So far, there is no report on the simultaneous detection of ethephon, thiadiuron and diuron in cotton and vegetable samples by liquid chromatography-mass spectrometry / mass spectrometry

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