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Method for measuring content of pyrethroid pesticides in mainstream smoke of cigarettes

A technology for pyrethroids and mainstream cigarette smoke, which is applied in the field of tobacco chemical analysis, can solve problems such as no public reports and the like, and achieves the effects of simple determination method, good selectivity and strong adsorption capacity

Inactive Publication Date: 2011-10-12
YUNNAN RES INST OF TOBACCO SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Method for measuring content of pyrethroid pesticides in mainstream smoke of cigarettes
  • Method for measuring content of pyrethroid pesticides in mainstream smoke of cigarettes
  • Method for measuring content of pyrethroid pesticides in mainstream smoke of cigarettes

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Embodiment Construction

[0027] The present invention will be described in detail below.

[0028] 1. Experimental part

[0029] 1. Instruments and Reagents

[0030] Agilent 6890 gas chromatograph-electron capture (ECD) detector (Agilent, USA), HP-5MS elastic quartz capillary column (30m×0.25μm×0.32mm) (Angilent, USA), standard 20-hole smoking machine (R20 type) , Germany Borgwaldt technick company), constant temperature and humidity box (KBF240 type, Germany), SB2200T ultrasonic extractor (Shanghai Bi Nengyi Co., Ltd.), quartz glass column, M110 muffle furnace (German Heraeus company), electric blast Drying box (101C-3, Shanghai Experimental Instrument Factory Co., Ltd.), 100mL concentration bottle with tail tube (the scale of the tail tube is 1mL, 2mL, 3mL, 4mL, 5mL), 250mL triangular conical flask with stopper, measuring cylinder .

[0031] Ethyl acetate, cyclohexane, n-hexane, acetone, methanol, acetonitrile, benzene (chromatographically pure, DIMA, USA); anhydrous sodium sulfate (analytical grade...

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Abstract

The invention relates to a method for measuring the content of pyrethroid pesticides in mainstream smoke of cigarettes and belongs to the technical field of tobacco chemical analysis. The method comprises the following steps of: extracting a sample by using acetone, purifying the sample by a self-prepared mixed chromatographic column, and detecting on a gas chromatograph; selecting an appropriate adsorbent according to the properties of complex matrixes of five pyrethroid pesticides and smoke, optimizing the using amount of the adsorbent, filling the five adsorbents or water absorbers into a glass chromatographic column from top to bottom, and activating by using 5 milliliters of acetone and 5 milliliters of normal hexane; and transferring sample test solution to be purified into the chromatographic column, eluting repeatedly twice by using 5 milliliters of mixed solvent of the acetone and the normal hexane in a volume ratio of 3:2 at the speed of less than or equal to 5.0 milliliters / minute, collecting eluent, concentrating to 0.5 milliliter on a rotary evaporator, fixing the volume to 2.0 milliliters by using the mixed solvent of the acetone and the normal hexane in a volume ratio of 3:2 to reach 2.0 milliliters, and analyzing on a gas chromatograph-electrochemical display (GC-ECD). The method has the advantages of simplicity, convenience, high efficiency and accuracy.

Description

Technical field: [0001] The invention relates to a method for detecting the content of pyrethroid pesticides in mainstream cigarette smoke, belonging to the technical field of tobacco chemical analysis. Background technique: [0002] Pyrethroid pesticides are a class of insecticides with excellent effects. Because of their high efficiency, low toxicity, fast knockdown and less residue, they are widely used for pest control in tea gardens, orchards, agricultural and livestock houses. In theory, if pesticides are used responsibly and strictly in accordance with good agricultural practices, the active ingredients of pesticides and their degradation products will still remain on tobacco, which is often considered a reasonable level. However, because my country's agricultural production is a small-scale production method, the quality of producers is uneven, and some farmers do not apply pesticides in accordance with the rational use of pesticides. At present, the problem of pest...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 黄海涛李雪梅夭建华米其利耿永勤杨叶昆陈建华缪恩铭唐萍
Owner YUNNAN RES INST OF TOBACCO SCI
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