摘要
建立了一种气相色谱-质谱联用技术检测进出口食品中氟烯草酸类除草剂残留的方法。采用乙酸乙酯提取样品中的氟烯草酸,凝胶渗透色谱(GPC)净化,气相色谱-质谱联用仪测定,外标法定量。结果表明,本方法的线性浓度范围为0.05～1μg/ml,线性相关系数为0.9983,平均回收率在70.35%～95.24%之间,相对标准偏差在3.22%～6.69%之间,说明方法的可靠性和精密度良好,并且该方法的定量限为5μg/kg,完全可以达到日本肯定列表的检测要求。
A GC-MS method, based on a sequential procedure of extraction of flumiclorac-pentyl residues in samples with ethyl acetate, clean-up by gel permeation chromatography （GPC）, GC-MS analysis and quantitative determination by external standard method, was presented for the determination of fiumiclorac-pentyl residues in import and export foods. The analytical method revealed a quantification limit of 5μg/kg and a linear range of 0.05-1μg/ml with the linear correlation coefficient of 0.9983. The average spike recoveries at two levels of 5.0 and 50μg/g were in the range of 70.35% -95.24%, with a relative standard deviation （RSD） of 3.22% - 6.69%. This method can meet the requirements of Japanese Positive List System qualification due to its excellent figures of merit.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第20期288-290,共3页
Food Science
基金
河北省博士基金项目(06547003D-3)
河北省教育厅课题(Z2005202)
河北科技大学杰出青年基金项目(2006JC-14)
