Method for simultaneously measuring residual quantity of three types of herbicide in vega soil

A residue and herbicide technology, applied in the field of simultaneous determination of three different types of herbicide residues in tobacco field soil, can solve the problems of reducing operation steps, interference, etc., achieving simple experimental operation, saving detection costs, and meeting work requirements. Effect

CN101718756AInactive Publication Date: 2010-06-02HUNAN TOBACCO CHENZHOU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-06-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for simultaneously measuring residual quantity of three types of herbicide in vega soil, belonging to the technical field of physicochemical detection of pesticide residue in vega soil. Specifically, acetonitrile is used for extraction, Florisil is carried out with solid phase extraction, a gas chromatograph is matched with an electron capture detector to directly measure the residual quantity of three types of herbicide, such as propanil, Rimsulfuron, quizalofop-p-ethyl and the like in vega soil. The invention overcomes the restriction of the defect and the condition of the prior art to optimize the pretreatment method and the instrument detection condition of vega soil samples. Compared with the prior art, the invention has the following favorable advantages that the invention can detect three types of herbicide all at once and has the advantages of simple pretreatment process, high detection sensitivity and good accuracy and reproducibility.
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Description

Technical field

[0001] The invention belongs to the technical field of physical and chemical detection of pesticide residues in tobacco soil, and mainly relates to the determination technology of three pesticide residues in tobacco soil, such as propanil, sulfone sulfuron-methyl, and quizalofop-p-ethyl. Specifically, it is a simultaneous A method for measuring three different types of herbicide residues in tobacco soil. Background technique

[0002] Dibaran, sulfone sulfuron-methyl and quizalofop-p-ethyl are three commonly used herbicides in farmland. Their main purpose is to eliminate or control the growth of weeds in agricultural production. Among them: propanil (N-3,4-dichlorophenylpropionamide) is an amide contact type post-emergence herbicide, mainly used to control rice field barnyard grass and other gramineous weeds; sulfone sulfuron [1-(4 , 6 dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridinesulfonyl)urea] is a sulfonylurea herbicide, which can effectively control a ...

Examples

Embodiment

[0031] A method for simultaneous determination of three different types of herbicide residues in tobacco soil.

[0032] (1), instruments, reagents and materials

[0033] American Agilent GC-6890N gas chromatograph (with ECD and Agilent 7683series autosampler), oscillator, METTLER AB204-E electronic balance (0.0001), SHZ-C water bath thermostatic oscillator, Varian Florisil Soil small column (6mL / 1000mg) and so on.

[0034] Dichloromethane, acetonitrile, acetone, and n-hexane are all chromatographically pure, and sodium chloride is analytically pure. There are three standard solutions of propanil, sulfone sulfuron-methyl and quizalofop-p-ethyl, all with a concentration of 1000 mg / L.

[0035] (2) Sample pretreatment

[0036] Extraction: Weigh 25.0g of tobacco soil sample in a 250mL Erlenmeyer flask, add 20mL distilled water, 50mL acetonitrile, shake well and shake on a shaker for 30 minutes, filter with a glass funnel, collect the filtrate in a 100mL stopper filled with 5g NaCl In the ...