第7卷第11期 2016年11月
食品安全质量检测学报 Journal of Food Safety and Quality
电感耦合等离子体质谱法测定果蔬中
13种金属元素
刘慧1,2，钱强1,2，金尉1,2，王莉莉1,2
Vol. 7 No. 11 Nov.,2016
(1.苏州出入境检验检疫局检验检疫综合技术中心，苏州215104;2.苏州世标检测技术有限公司，苏州
215104)
摘要：目的
建立电感耦合等离子体质谱法(inductivelycoupledplasmamassspectrometry，ICP-MS)和在线内
标法测定果蔬中铅(Pb)、砷(As)、镉(Cd)、铜(Cu)、铬(Cr)5种重金属元素及钠(Na)、钾(K)、钙(Ca)、锌(Zn) 硒(Se)、镁(Mg)、铁(Fe)、锰(Mn)8种微量元素的方法。方法对样品微波消解的功率和进样酸度进行优化，果蔬样品经微波消解后，进行ICP-MS测定，并对方法的线性关系、准确度、精密度和定量限进行考察。结果选 009 r≥0.9991，重金属元素的方法检出限为0.5μg/L，微量元素的方法检出限为10μg/L。13种元素的加标回收率为 79.2%~91.6%，相对标准偏差小于5%，符合GB/T27404-2008中的要求。结论
：本方法快速、准确、灵敏度高，
可用于果蔬中重金属元素及微量元素的测定。
关键词：电感耦合等离子体质谱法；微波消解；果蔬；重金属元素；微量元素
Determinationofi3kindsofmetalelementsinfruitsandvegetablesbyinductively
coupledplasmamassspectrometry
LIU Huil.2", QIAN Qiang'2, JIN Weil-2, WANG Li-Lil.2
(1. Comprehensive Technology Center of Suzhou Entry-Exit Inspection and Quarantine Buream, Suzhou 215104,
Chind; 2. Suzhoa World Standard Testing Technology Co., Lid., Suzhou 215104, China)
ABSTRACT: ObjectiveTo establish a method for determination of 5 kinds of heavy metals (Pb, As, Cd, Cu, Cr) and 8 kinds of trace elements (Na, K, Ca, Zn, Se, Mg, Fe, Mn) in fruits and vegetables by inductively coupled plasma eaeee digestion and sample acidity were optimized, and the samples were detected by ICP-MS after microwave digestion. At the same time, the linear relation, accuracy, precision and quantitative limit of the method were investigated ResultsThe appropriate power of the microwave digestion instrument was 1600 W, and the sample acidity was selected 3%. The correlation coefficients (r) of standard curves of 13 kinds of elements standard were greater than 0.9991, and the detection limits of heavy metals and trace elements were 0.5 μg/L and 10 μg/L, respectively. The recoveries of 13 kinds of elements were ranged from 79.2% to 91.6% with the relative standard deviations (RSDs) less than 5%, which met the requirements of GB/T 27404-2008. ConclusionThe method is rapid, sensitive and accurate, which can be used for the determination of heavy metal elements and trace elements in fruits and vegetables
*通讯作者：刘慧，助理工程师，主要研究方向为食晶理化检测。E-mail:847008295@qq.com
*Corresponding author: LIU Hui, Assistant Engineer, Comprehensive Technology Center of Suzhou Entry-Exit Inspection and Quarantine Bureau,
No.98, Suhui Road, Suzhou 215104, China. E-mail: 847008295@qq.com 万方数据