分散固相萃取-气相色谱-质谱法测定水果和蔬菜中扑草净和禾草丹残留量
GC-MS Determination of Residual Amounts of Prometryne and Thioencarb in Fruits and Vegetables with Dispersive Solid Phase Extraction
摘 要
以乙腈作萃取溶剂,乙二胺-N-丙基硅烷(PSA)为吸附剂对水果和蔬菜中残留的扑草净和禾草丹进行固相分散萃取.提取液供气相色谱-质谱仪测定,外标法定量.在优化的试验条件下,选定m/z 241和m/z100分别作为扑草净和禾草丹的定量离子,在选择离子监测模式下,扑草净和禾草丹的线性范围均为0.05~10.0 mg·L-1.用标准加入法测得两除草剂的回收率分别在89.0%~92.0%和92.0%~95.0%之间,相对标准偏差(n=6)均小于7%
分散固相萃取
农药残留
扑草净
禾草丹
水果
蔬菜
GC-MS
DSPE
Residual pesticides
Prometryne
Thioencarb
Fruits
Vegetables
Abstract
Residual amounts of prometryne and thioencarb in samples of fruit and vegetable were extracted by dispersive sold phase extraction (DSPE) technique with acetonitrile as extraction solvent and PSA as adsorbent.The eluate was determined by GC-MS,and external standard calibration was adopted in the determination.Under the optimized conditions,the ions with m/z 241 and 100 were selected as quantitative ions for the determination of prometryne and thioencarb respectively.Linearity ranges for both prometryne and thiencarb were between 0.05-10.0 mg·L-1.The values of recovery for prometryne and thioencarb found by standard addition method were in the ranges of 89.0%-92.0% and 92.0%-95.0%,respectively,and values of RSD′s (n=6) found were less than 7%.
中图分类号 O657.63
所属栏目 工作简报
基金项目 江苏出入境检验检疫局科研计划(2009KJ33)
收稿日期 2009/7/10
修改稿日期
网络出版日期
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备注曾正宏(1968-),女,江苏盐城人,高级工程师,主要从事食品农药残留分析研究工作.
引用该论文: ZENG Zheng-hong,CHEN Yong,YANG Rui-zhang,WANG Tai-quan,ZHANG Dan,CAO Jun. GC-MS Determination of Residual Amounts of Prometryne and Thioencarb in Fruits and Vegetables with Dispersive Solid Phase Extraction[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(9): 1046～1048
曾正宏,陈勇,杨瑞章,王太全,张丹,曹军. 分散固相萃取-气相色谱-质谱法测定水果和蔬菜中扑草净和禾草丹残留量[J]. 理化检验－化学分册, 2010, 46(9): 1046～1048
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【3】李淑娟,陈冬东,李晓娟,等.气相色谱－质谱法测定食品中扑草净的残留量[J].中国卫生检验杂志,2007,17(12):2138-2140．
【4】杨云,栾伟,李攻科.微波辅助萃取气相色谱-质谱联用测定蔬菜中的扑草净[J].分析试验室,2003,22(4):75-78．
【5】沈伟健,杨雯筌,赵增运,等.气相色谱-质谱联用法测定紫菜中扑草净的残留量[J].分析试验室,2008,27(2):84-87．
【6】SN 0492-1995出口粮谷中禾草丹残留量检验方法[S]．
【7】易军,李去春,弓振斌.食品中农药残留分析样品的前处理技术进展[J].化学进展,2002,14(6):415-417．
【8】NY/T 1380-2007蔬菜、水果中51种农药多残留的测定气相色谱质谱法[S]．
【9】SN/T 1968-2007进出口食品中扑草净残留量检测方法气相色谱质谱法[S]．
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