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Quantitative determination method for general chlorantraniliprole residual quantity

A technology for quantitative detection of chlorantraniliprole, which is applied in the field of quantitative detection of general-purpose chlorantraniliprole residues, can solve the problems of low processing efficiency, high price of GC-MS, and low penetration rate. Achieve the effects of large adsorption capacity, rapid adsorption and removal of pigment, and large specific surface area

Inactive Publication Date: 2017-03-22
连云港市农村能源环境保护办公室 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method reported in this patent is simple to operate and can be qualitative and quantitative, the sample is extracted homogeneously. When the number of samples is large, the processing efficiency is low, and cross-contamination is prone to occur. Difficult to use

Method used

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  • Quantitative determination method for general chlorantraniliprole residual quantity
  • Quantitative determination method for general chlorantraniliprole residual quantity
  • Quantitative determination method for general chlorantraniliprole residual quantity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: A quantitative detection method for chlorantraniliprole residues in tea

[0049] The blank tea samples were taken from the tea field of the Agricultural Science Research Institute in Taihu Lake, Jiangsu Province. No pesticides were applied during the planting process, and the fresh leaves picked were made into dry tea according to the traditional green tea processing technology.

[0050] The actual test tea samples were purchased from a supermarket, and the place of origin was Suzhou East Dongting Mountain Tea Garden. The tea samples were pulverized with a pulverizer, mixed, and stored in a refrigerator at 4 °C.

[0051] The quantitative detection method consists of two parts:

[0052] In the first part, the standard curve of the measured chlorantraniliprole with known gradient concentration is established by gas chromatography-electron capture method; the establishment of the standard curve consists of the following steps:

[0053] The first step is to pre...

Embodiment 2

[0091] Example 2: A quantitative detection method for chlorantraniliprole residues in soil

[0092] The soil samples were taken from the East Dongting Mountain Tea Garden in Suzhou, the sampling depth was 0-15cm, and the soil type was yellow loam (pH=4.1-4.7). The samples were naturally air-dried in a ventilated and dark place, and large-grained sand, grass roots and other debris were removed, ground, passed through a 0.25mm (60 mesh) sieve, and stored in a ziplock bag. The prepared soil samples should be analyzed as soon as possible, otherwise they should be stored in a freezer at -18°C to -20°C. The blank soil sample was also taken from the East Dongting Mountain Tea Garden in Suzhou, and it was tested to contain no pesticides to be tested.

[0093] The quantitative detection method consists of two parts:

[0094] In the first part, the standard curve of the measured chlorantraniliprole with known gradient concentration is established by gas chromatography-electron capture...

Embodiment 3

[0133] Example 3: A quantitative detection method for chlorantraniliprole residues in Chinese cabbage

[0134] Cabbage was purchased from the farmer’s market in Wangting Town, Suzhou City. The surface attachments were gently wiped off with a clean gauze, then crushed with a grinder, and put into PE bags for testing. The blank cabbage sample is the cabbage that has been tested without the pesticide to be tested.

[0135] The quantitative detection method consists of two parts:

[0136] In the first part, the standard curve of the measured chlorantraniliprole with known gradient concentration is respectively established by gas chromatography-electron capture method; the establishment of the standard curve consists of the following steps:

[0137] The first step is to prepare a blank matrix sample, and the preparation method consists of the following steps:

[0138] (1) Accurately weigh 10.0 g of the blank Chinese cabbage sample that was determined not to contain the tested chl...

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Abstract

The invention relates to a quantitative determination method for general chlorantraniliprole residual quantity. The method is characterized in that residual chlorantraniliprole in a test sample is subjected to ultrasonic extraction by an acetonitrile solvent, a proper amount of MWCNTS and PSA adsorbents are used for removing impurity, a supernatant is subject to nitrogen blowing and concentrating until nearly dry; volume metering is carried out by using an acetone-hexane mixed solvent with volume ratio of 1:1, a HP-5 chromatographic column program is used for heating and separating, electron capture detector ECD detection is carried out, and a matrix external standard method is used for quantification. Through test, the method has the advantages of simple, fast and accurate operation, easy popularization and grasping, low cost, is the rapid and reliable method for detecting the residual chlorantraniliprole in different samples, and can satisfy the quality and progress requirement by analysis of large-batch samples.

Description

technical field [0001] The invention relates to the field of detection methods for pesticide residues, in particular to a general-purpose quantitative detection method for chlorantraniliprole residues. The quantitative detection method uses multi-walled carbon nanotubes (MWCNTS) and PSA as adsorbents. The improved QuEChERS method was used to remove impurities and purify the samples, and then gas chromatography-electron capture detector (GC-ECD) was used to determine chlorantraniliprole in different types of samples, so as to achieve the purpose of fast, simple and reliable. Background technique [0002] In recent years, with the prohibition and restriction of highly toxic pesticides such as organophosphorus and organochlorine in various countries in the world, and the rapid development of pest resistance to existing insecticides, the search for and development of pesticides with new mechanisms of action has become the focus of attention at home and abroad. . Chlorantranilip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/70
CPCG01N30/02G01N30/70
Inventor 谢修庆刘腾飞杨代凤孙皓魏学敏沈晓阳范君
Owner 连云港市农村能源环境保护办公室
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