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
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[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 ...
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