关键词: 变化分析, 变化分析

Abstract:

In order to studying ethylenebis dithiocarbamates that take the case of zineb on the extraction from peanuts and determination. The S-methyl dithiocarbamates residues of derivative of zineb in peanut and soil were determined by GLC method. In that method the sample was treated with alkaline EDTA solution in order to transform zine salts of dithiocarbamic acids into their readily water-soluble sodium salts. The dithiocarbamate anions were extracted at Ph 6.5-8.0 to chloroform-hexane (3:1) as ion pairs of tetrabutylammonium and alkylated with methl iodide to form s-methyl dithiocarbamates. The residue was reextracted, then quantitatively determined by gas chromatography coupled with FPD-S detector. The minimum detection limit for was 2.5×10-10 g and the lowest detection concentrations in soil and peanut were 0.03 mg/kg respectively. The recoveries of prochloray spiked in soil and peanut sample were 88.99%-92.80%, with variable coefficients of 2.78%-4.65% respectively. Present study explained the method correctly, simple and precision, the scope was wide to meet the pesticide residue analysis requirements.The residue was reextracted, then quantitatively determined by gas chromatography coupled with FPD-S detector. The minimum detection limit for was 2.5×10-10g and the lowest detection concentrations in soil and peanut were 0.03mg?kg-1 respectively. The recoveries of prochloray spiked in soil and peanut sample were 88.99%~92.80%, with variable coefficients of 2.78%~4.65% respectively.