自动石墨消解-电感耦合等离子体质谱法监测干制水产品中的铅、砷、铝、铬、铁、铜  

Automatic graphite digestion and inductively coupled plasma mass spectrometry for monitoring lead,arsenic,aluminum,chromium,iron,and copper in dried aquatic products

作　　者：张虹艳 丁武[2] 吴福祥 王小乔 刘笑笑 苗茜 张婕 ZHANG Hongyan;DING Wu;WU Fuxiang;WANG Xiaoqiao;LIU Xiaoxiao;MIAO Qian;ZHANG Jie(Lanzhou Food and Drug Inspection Institute,Lanzhou 730050,China;Northwest Agricultural and Forestry University of Science and Technology,Yangling 712100,China)

机构地区：[1]兰州市食品药品检验所,甘肃兰州730050 [2]西北农林科技大学,陕西杨凌712100

出　　处：《食品与发酵工业》2019年第3期266-269,共4页Food and Fermentation Industries

摘　　要：为建立同时检测干制水产品中铅、砷、铝、铬、铁、铜金属残留的电感耦合等离子体质谱(Inductively coupled plasma mass spectrometry,ICP-MS)方法。选择自动石墨消解仪对样品进行消解,消解完全后,利用ICP-MS对样液进行检测,内标法定量分析。结果显示:铅、砷、铝、铬、铁、铜元素浓度在0. 25～25μg/L范围内线性良好,相关系数(R2)均大于0. 990;检测限:铅0. 02μg/L、砷0. 08μg/L、铝0. 12μg/L、铬0. 10μg/L、铁0. 03μg/L、铜0. 05μg/L;加标回收率在84. 0%～108. 4%之间;方法重复性RSD(n=6)低于10%。该方法操作简单、准确度高、检测限低、重复性好,可以用于干制水产品中的金属元素检测。This study aimed to establish a method that uses inductively coupled plasma mass spectrometry(ICP-MS)to simultaneously determine lead,arsenic,aluminum,chromium,iron,and copper in dried aquatic products.Samples were digested in automatic graphite digestion,followed by quantitative tests using internal standard method by ICP-MS.The results showed that the concentrations of lead,arsenic,aluminum,chromium,iron,and copper showed good linear relationships in the range of 0.25-25μg/L,with correlation coefficients(R 2)higher than 0.990.The detection limits for lead,arsenic,aluminum,chromium,iron,and copper were 0.02μg/L,0.08μg/L,0.12μg/L,0.10μg/L,0.03μg/L,and 0.05μg/L,respectively.The recovery rate was 84.0%-108.4%.The relative standard deviation of reproducibility was less than 10%(n=6).This method was proved to be simple,accurate,with low detection limits and good reproducibility,which can be used to detect metals in dried aquatic products.

关 键 词：石墨消解 电感耦合等离子体质谱法 干制水产品 铅 砷 

分 类 号：O657.63[理学—分析化学] TS254.7[理学—化学]