摘要
建立一种准确、快速的测定大米中农药马拉硫磷残留的方法。经丙酮溶液提取,用石墨化碳黑小柱和氟罗里硅柱双柱结合净化,氮吹浓缩,然后用气相色谱-质谱联用(GC-MS)检测。马拉硫磷标准质量浓度在0.1~1.0mg/L范围内,线性关系良好,相关系数r达0.998。添加质量分数为0.1~1.0mg/kg时,回收率在91.8%~119.5%,相对标准偏差(RSD)在3.1%~8.5%,定量检出限达0.05mg/kg。新建的GC-MS法操作简单、净化效果好、灵敏度高、检测效果良好。
In this study,we intended to develop a rapid and precise method for the detection of malathion in rice.Malathion in rice was extracted by acetone solution,and the extract was purified by the combination of Carb SPE column and LC-Florisil SPE column.Then the extract was concentrated by nitrogen-blow,and detected by gas chromatogram-mass spectrometry(GC-MS).There was a good linearity within the range of 0.1~1.0 mg/L with the correlation coefficient of 0.998.The recoveries were between91.8%~119.5%with the relative standard derivations between 3.1%~8.5%at the spiking levels of 0.1 mg/kg^1.0 mg/kg.The detection limit reached 0.05 mg/kg.The detection method built in this study is accurate,and easy to operate.
作者
杨卫花
姜彩仙
寸宇智
彭飞进
Yang Weihua;Jiang Caixian;Cun Yuzhi;Peng Feijin(Dali Quality and Technical Supervision Comprehensive Inspection Center,Dali 67100,China;College of Agriculture and Bioscience,Dali University,Dali 671003,China;Centre Testing International Group Co.,Ltd.,Kunming 650217,China)
出处
《云南化工》
CAS
2019年第9期92-95,共4页
Yunnan Chemical Technology
