摘要
采用气相色谱-质谱法同时测定土壤中30种农药残留。样品经过丙酮-正己烷（1＋1）混合溶液均质提取,再用正己烷进行萃取,弗罗里硅土柱净化后,采用HP-5MS色谱柱分离,选用电子轰击离子源和选择离子监测模式进行质谱分析,外标法定量。30种农药的线性范围为0.1-1.0mg·L^-1,检出限（3S/N）为3.8-9.6μg·kg^-1。加标回收率在75.8%-103%之间,测定值的相对标准偏差（n=6）在5.6%-9.7%之间。
A GC-MS method was developed for the determination of 30 pesticide residues in soil.The sample was extracted with acetonen-hexane（1＋1）and hexane in succession.Then the extract was cleaned up on a florisil cartridge and separated on a HP-5MS column.EI-SIM was adopted in MS and external standard was used for quantification.The linearity range of 30 pesticide residues was 0.1-1.0mg·L^-1 with detection limits（3S/N）in the range of 3.8-9.6μg·kg^-1.The recovery rates measured by standard addition method were in the range of75.8%-103% and RSD（n=6）were in the range of 5.6%-9.7%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2015年第7期925-929,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
国家质检总局科研项目(2012IK176)
山东检验检疫局科研项目(SK201353)
