期刊
ANALYTICA CHIMICA ACTA
卷 559, 期 2, 页码 173-180出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2005.11.078
关键词
soil; ultrasonic solvent extraction; organochlorine pesticides; environmental analysis
Ultrasonic solvent extraction of the organochlorine pesticides (OCP) including alpha-, beta-, gamma- and Delta-hexachlorocyclohexane (HCH), heptachlor, aldrin, o,p'-DDE, dieldrin, p,p'-DDE, p,p'-DDT, methoxychlor, mirex from soil is reported. The extraction procedure was optimized with regard to the solvent type, amount of solvent, duration of sonication and number of extraction steps. Determination of pesticides was carried out by gas chromatography (GC) equipped with electron capture detection (ECD). Twice ultrasonic extraction using 25 mL, of a mixture of petroleum ether and acetone (1/1 v/v) for 20 min of sonication showed satisfactory extraction efficiency. Recoveries of pesticides from fortified soil samples are over 88% for three different fortification levels between 15 and 200 p,g kg(-1), and relative standard deviations of the recoveries are generally below 6%. Real soil samples were analyzed for OCP residues by optimized ultrasonic solvent extraction and shake-flask as well as soxhlet extraction technique. Investigated all extraction methods showed comparable extraction efficiencies. Optimized ultrasonic solvent extraction is the most rapid procedure because the use of time in ultrasonic extraction was considerably reduced compared to shake-flask and soxhlet extraction. (c) 2005 Elsevier B.V. All rights reserved.
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