摘要
建立了气相色谱-质谱-选择离子监测(GC-MS-SIM)同时测定土壤中10种农药(三嗪类除草剂、酰胺类除草剂和有机氯农药)的多残留分析方法.样品采用正己烷/丙酮(1:1,V/V)超声提取、氟罗里硅土柱层析净化、GC-MS-SIM测定.10种农药在0.01(0.02)—1.0(2.0)mg.l-1范围内线性良好,相关系数介于0.9963—0.9998之间;在10,50和250ng.g-1添加水平下,平均回收率介于81%—117%之间,相对标准偏差均小于14.4%;方法检出限达到ppb至sub-ppb级(0.1—1.3ng.g-1).将此方法应用于辽宁省不同性质土壤中70个实际土壤样品的分析,阿特拉津、乙草胺、六氯苯、丁草胺、狄氏剂和艾氏剂有检出,该法对不同性质土壤具有广泛适用性.
A gas chromatography-mass spectrometry-selected ion monitoring（GC-MS-SIM） method has been deve- loped for multi-residue analysis of 10 pesticides （triazine herbicides, chloroacetanilide herbicides and organo- chlorine pesticides） in soil. The method is based on ultrasonic extraction using hexane/acetone （1： 1, V/V）, florisil cleanup and GC-MS-SIM determination. The linear ranges of the 10 pesticides were 0. 01 （0. 02） -- 1.0 （2. 0） mg·l^-1, and the correlation coefficients were 0. 9963---0. 9998. The average recoveries of the 10 pesticides at the three spiked levels（ 10, 50, 250 ng·g^-1） ranged from 81% to 117% with good precision （ 〈 14. 4% ） . Pesticides residues could be detected in the low- to sub-ppb range （0. 1--1.3 ng·g^-l） . This methodology has been applied to analysis of 70 real soil samples of different characteristics from Liaoning Province in which atrazine, acetochlor, hexachlorobenzene, butachlor, dieldrin and aldrin were detected. It is widely applicable for soil of different properties.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第6期899-903,共5页
Environmental Chemistry
基金
财政部社会公益科研项目(2007-10)
沈阳市科技支撑计划(1081197-3-00)
沈阳市大型仪器共享项目(2008gx-034)
关键词
除草剂
有机氯农药
土壤
质谱
多残留分析
herbicide
organochlorine pesticides
soil
mass spectrometry
multi-residue analysis
