期刊
CHROMATOGRAPHIA
卷 77, 期 3-4, 页码 329-336出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10337-013-2604-6
关键词
Gas chromatography; Electron capture detector; Homogeneous liquid-liquid microextraction; Organochlorine pesticides; Ternary component system
A fast and effective preconcentration method for extraction of organochlorine pesticides (OCPs) was developed using a homogeneous liquid-liquid extraction based on phase separation phenomenon in a ternary solvent (water/methanol/chloroform) system. The phase separation phenomenon occurred by salt addition. After centrifugation, the extraction solvent was sedimented in the bottom of the conical test tube. The OCPs were transferred into the sedimented phase during the phase separation step. The extracted OCPs were determined using gas chromatography-electron capture detector. Several factors influencing the extraction efficiency were investigated and optimized. Optimal results were obtained at the following conditions: volume of the consolute solvent (methanol), 1.0 mL; volume of the extraction solvent (chloroform), 55 mu L; volume of the sample, 5 mL; and concentration of NaCl, 5 % (w/v). Under optimal conditions, the preconcentration factors in the range of 486-1,090, the dynamic linear range of 0.01-100 mu g L-1, and the limits of detection of 0.001-0.03 mu g L-1 were obtained for the OCPs. Using internal standard, the relative standard deviations for 1 mu g L-1 of the OCPs in the water samples were obtained in the range of 4.9-8.6 % (n = 5). Finally, the proposed method was successfully applied for extraction and determination of the OCPs in water and fruit samples.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据