Method for detecting residual quantity of disulfuron and metabolite thereof in plant-derived food

A plant-derived, flusulfone-acid technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as easy to interfere with the measurement results

Active Publication Date: 2021-09-10
GUANGDONG BRANCH OF CHINA TOBACCO GENERAL
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Compared with animal-derived foods, pigments in plant-derived foods and other co-extracted substances (fatty acids, phospholipids, etc.) in plant tissues are likely to interf

Method used

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  • Method for detecting residual quantity of disulfuron and metabolite thereof in plant-derived food
  • Method for detecting residual quantity of disulfuron and metabolite thereof in plant-derived food
  • Method for detecting residual quantity of disulfuron and metabolite thereof in plant-derived food

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Embodiment 1

[0052] This example provides a method for determining the residual amount of flusulfone-fin and its metabolites in plant-derived foods. The dried tobacco or tea samples are used as samples to be tested. The determination process is as follows: figure 1 As shown, it specifically includes the following steps:

[0053] S1 extraction: the sample is dried and pulverized, and sieved. Accurately weigh 2.0g of sample (accurate to 0.01g) into a 50mL stoppered centrifuge tube, add 10mL of water, and let it stand for 10min until the sample is fully infiltrated by water; pipette 10mL of acetonitrile solution containing 1% formic acid into the centrifuge tube, Shake at 2000r / min for 3min; then add 4g of anhydrous magnesium sulfate and 1g of sodium chloride to the centrifuge tube, and immediately oscillate on a vortex mixer at 2000r / min for 3min, and the supernatant is the extract.

[0054] S2 purification: pipette 1.0mL of the extract in S1 in a 2mL centrifuge tube (20mg of titanium carbi...

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Abstract

The invention discloses a method for detecting residual quantity of disulfuron and metabolite thereof in plant-derived food, wherein the method comprises the steps: after oscillating and extracting a plant-derived food sample, carrying out dispersive solid-phase extraction and purification by taking a titanium carbide multilayer nanosheet as a purifying agent; and determining the residual quantity of the disulfuron and the metabolite thereof in the sample by adopting ultra-high performance liquid chromatography-tandem mass spectrometry. By optimizing a sample pretreatment method and instrument detection conditions, the pretreatment process is simple and rapid, the operation is accurate, the sensitivity is high, and the repeatability is good; and the sample recovery rate can reach 102.9%, and the relative standard deviation (RSD) is less than 6.0%.

Description

technical field [0001] The invention belongs to the technical field of determination of pesticide residues, and in particular relates to a method for detecting the residues of flusulfazone and its metabolites in plant-derived foods. Background technique [0002] The problem of pesticide residues is an important part of food safety issues, and the index of pesticide residues in food is an important content of food quality control in various countries. The existing methods for the determination of pesticide residues generally further optimize the pretreatment method of the QuEChERS method to reduce the influence of the sample matrix on the instrument analysis. Dispersed solid-phase purifiers play a key role in the QuEChERS series of methods. Common purifiers are N-propylethylenediamine-bonded solid-phase adsorbents, or N-propylethylenediamine (PSA)-based, and graphitized One or two of carbon black (GCB), C18, and neutral alumina are used in combination to increase purificatio...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/72G01N30/86
CPCG01N30/02G01N30/06G01N30/72G01N30/8634G01N2030/047
Inventor 彭云铁韶济民李波谢鑫陈玉松
Owner GUANGDONG BRANCH OF CHINA TOBACCO GENERAL
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