A quantitative detection method for organophosphorus pesticides in fresh tea leaves
A quantitative detection method, organophosphorus pesticide technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of insufficient stability and reliability of detection results, high consumption of organic solvents, cumbersome operations, etc., and achieve stable results, low detection limits, good repeatability
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[0040] Example: A Quantitative Detection Method of Organophosphorus Pesticides in Fresh Tea Leaves
[0041] The fresh leaves of the tested tea were taken from a local tea plantation in Suzhou, crushed and mixed by a pulverizer, put into a clean container, and stored in a -20°C refrigerator for later use. The quantitative detection method consists of two parts:
[0042] The first part, establishes the standard curve of the measured organophosphorus pesticide of known gradient concentration with gas chromatography; The establishment of described standard curve is made up of the following steps:
[0043] The first step is to prepare a blank matrix extract, and the preparation method consists of the following steps:
[0044] (1) Weigh 5.0g of blank tea leaf samples that are determined to be free of the tested organophosphorus pesticides and pyrethroid pesticides, place them in a 50mL centrifuge tube, and then add 10mL of acetic acid containing 1% volume fraction to the centrifuge...
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