分散固相萃取-气相色谱-质谱法测定农产品及产地土壤中均三氮苯类除草剂残留量  

GC-MS Determination of Residual Amounts of S-Triazine Herbicides in Agricultural Products and Soil of Their Producing Area with Dispersive Solid Phase Extraction

作　　者：曹军[1] 于伯华[1] 陈勇[1] 杨瑞章[1] 王太全[1] 曾正宏[1] 张丹[1] 高玲[1] 

机构地区：[1]盐城出入境检验检疫局,盐城224002

出　　处：《理化检验（化学分册）》2012年第8期959-961,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：江苏出入境检验检疫局科研计划(2009KJ33)

摘　　要：以冰乙酸正己烷饱和乙腈溶液作萃取剂,以乙二胺-N-丙基硅烷(PSA)、C_(18)、石墨化炭黑(Carb)为吸附剂对农产品及产地土壤中13种均三氮苯类除草剂进行分散固相萃取。提取液供气相色谱-质谱仪测定。在选择离子监测模式下,13种均三氮苯类除草剂的线性范围均为0.05～5 mg·L^(-1)。西玛津和氰草津的测定下限(10S/N)为0.01 mg·kg^(-1),其余11种除草剂的测定下限为0.005 mg·kg^(-1)。在0.01,0.1 mg·kg^(-1)两个添加水平下进行回收试验,13种均三氮苯类除草剂的回收率在75.0%～111.8%之间,测定值的相对标准偏差(n=6)在3.2%～9.2%之间。Residual amounts of S-triazine herbicides in samples of agricultural products and the soil of their producing area were extracted by dispersive solid phase extraction （DSPE） with acetonitrile （saturated with glacial acetic acid and n-hexane） as extraction solvent and PSA, C18, Carb as adsorbent. The eluate was determined by GC- MS. Under the selection ion monitoring mode, linearity ranges for 13 S-triazine herbicides were between 0.05- 5.0 mg · L-1, with lower limits of determination （10S/N） of 0. 01 mg · kg-1 for simazine and cyanazine, and 0. 005 mg · kg-1 for the others. Tests for recovery and precision were made by addition of 0. 01 mg · kg-1 and 0.1 mg ·kg-1 of standard solutions, and analyzed by the proposed method, values of recovery in the range of 75.0%-111.8% and values of RSD＇s （n=6） in the range of 8.2%-9.2% were obtained.

关 键 词：分散固相萃取 气相色谱-质谱法 均三氮苯类除草剂 农产品及产地土壤 

分 类 号：O657.6[理学—分析化学]