摘要
为建立大批量谷类产品中重金属元素的快速检测方法,采用快速消解法,样品于聚丙烯刻度离心管中经硝酸消解,用电感耦合等离子体质谱仪同时检测Pb、Cd、Cr、Cu、Zn、Ni、As、Hg等8种重金属元素含量。研究了消解酸用量及消解时间对结果的影响,并优化了仪器工作参数。研究结果表明,样品在120℃消解1 h后直接定容测定,各元素在实验浓度范围内线性良好,相对标准偏差RSD值1.1%~7.2%,Pb、Cd、Cr、Cu、Zn、Ni、As、Hg各元素的方法检出限分别为0.02、0.0003、0.03、0.02、0.08、0.01、0.002和0.0004 mg/kg。试剂用量少、简便、快捷、准确性好,适用于电感耦合等离子体质谱法定量检测稻米、小麦、玉米等谷类产品中重金属元素的含量。
The objective of this study is to establish a method for rapid determination of heavy metals in cereal products.The study investigated the partial digestion of cereal tissues with nitric acid in a centrifuge tube for the determination of eight heavy metals(namely Pb,Cd,Cr,Cu,Zn,Ni,As and Hg)by inductively coupled plasma mass spectrometry(ICP-MS).The consumption of nitric acid,digestion time and the ICP operating parameters were optimized.The proposed method showed good linearity,precision,and sensitivity after 1 h of heating at 120℃.The relative standard deviation(RSD)ranged from 1.1%to 7.2%.The limits of detection of the method were 0.02,0.0003,0.03,0.02,0.08,0.01,0.002,and 0.0004 mg/kg for Pb,Cd,Cr,Cu,Zn,Ni,As and Hg,respectively.The optimized method provided here for the simultaneous determination of eight heavy metals in rice,wheat,corn and other cereal samples by ICP-MS was simple,rapid,and sensitive.
作者
李优琴
吕康
倪晓璐
王亚
余向阳
LI Youqin;LYU Kang;NI Xiaolu;WANG Ya;YU Xiangyang(Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing,Jiangsu 210014,China;Supervision and Testing Center for Processed Agro-product (Nanjing),Ministry of Agriculture,Nanjing,Jiangsu 210014,China;Key Laboratory for Control Technology and Standard for Agro-product Sa fety and Quality,Ministry of Agriculture,Nanjing,Jiangsu 210014,China)
出处
《中国无机分析化学》
CAS
北大核心
2022年第1期20-25,共6页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家自然科学基金青年基金项目(41701373)
2018年江苏省农产品质量安全项目(SJCW012-3-4)。
关键词
重金属
谷类产品
电感耦合等离子体质谱法
快速检测
heavy metal
cereal products
inductively coupled plasma mass spectrometry
rapid detection
