Method for determining organochlorine pesticide residues in tobaccos or tobacco products

A technology for pesticide residues and tobacco products, which is applied in the field of determination of organochlorine pesticide residues in tobacco and tobacco products, can solve the problems of rapid analysis of unfavorable samples, high price of purification materials, and prolonged analysis time, so as to reduce test costs, Overcome the tedious and time-consuming effect of simple operation

Active Publication Date: 2015-04-29
CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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  • Abstract
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  • Application Information

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Problems solved by technology

Among them, the commonly used adsorption materials can be ethylenediamine-N-propyl bonded silica gel or C18 bonded silica gel. Although this type of material can remove pigments, organic acids and sugars in the matrix, it is effective in reducing matrix effect interference. limited role
Moreover, such adsorbent materials usually require centrifugation or filtration to separate from the extract, which prolongs the analysis time and is not conducive to the rapid analysis of a large number of samples.
In addition, the purification materials used in the prior art are relatively expensive

Method used

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  • Method for determining organochlorine pesticide residues in tobaccos or tobacco products
  • Method for determining organochlorine pesticide residues in tobaccos or tobacco products
  • Method for determining organochlorine pesticide residues in tobaccos or tobacco products

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Embodiment 1

[0027] A method for the determination of organochlorine pesticide residues in tobacco and tobacco products:

[0028] 1) Prepare an internal standard solution: use triphenyl phosphate as the internal standard and toluene as the solvent to prepare an internal standard solution with a concentration of 20 μg / mL;

[0029] 2) Prepare matrix-matched series standard working solutions: Prepare matrix-matched series standard working solutions with concentration gradients and internal standards, as follows:

[0030] Using a variety of organochlorine pesticide standard products (that is, the twenty-six organochlorine pesticide standard products in Table 1) as the solute, toluene as the solvent, and triphenyl phosphate as the internal standard, prepare a series of standard working solutions with different concentrations: 0.001, 0.002, 0.005, 0.010, 0.020, 0.050, 0.100, 0.200 μg / mL, and the internal standard concentration in the series of standard working solutions is 0.200 μg / mL; take a bl...

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Abstract

The invention discloses a method for determining organochlorine pesticide residues in tobaccos or tobacco products. The method comprises the following steps: leaching a wetted tobacco leaf sample with an organic solvent; adding a drying agent to dry extract liquid, and then purifying the extract liquid with a magnetic adsorbent; and finally detecting by an on-line gel permeation chromatography-gas chromatography-tandem mass spectrometry instrument, and building a method for determining organochlorine pesticide residues in tobaccos or tobacco products. According to the method disclosed by the invention, the defects of an existing determination method are overcome; a sample pretreatment method and an instrument detection condition are optimized; compared with the prior art, the method has the advantages that the testing cost is reduced, and has the advantages of simplicity in operation, high purifying capacity, high sensitivity and the like.

Description

technical field [0001] The invention belongs to the technical field of measuring pesticide residues, in particular to a method for measuring organochlorine pesticide residues in tobacco and tobacco products. Background technique [0002] Organochlorine pesticides are organic compounds containing chlorine in the components used to prevent and control plant diseases and insect pests. Although they play a very important role in ensuring high crop yields, their widespread use will lead to their residues on agricultural products, which will endanger Human health and negative impact on the ecological environment. The Agrochemical Advisory Committee of the International Tobacco Scientific Research Cooperation Center issued the basic principles and implementation opinions of the guiding pesticide residue limits in tobacco in 2003, which were expanded and revised in 2013, and a total of 120 kinds of pesticide residues were proposed. These limit indicators have put forward higher req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 罗彦波陈再根庞永强朱风鹏姜兴益李雪
Owner CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
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