微波消解-ICP-MS法测定食品、水产品及.docVIP

微波消解-ICP-MS法测定食品、水产品及动物组织中33种金属元素 曾海英1王家磊1沈萍萍1赵玉梅1李钰金2刘远平3毕志明4刘志敏 (1. 威海时进食品检测服务有限公司荣成264309; 2. 泰祥集团—山东省冷冻调理食品加工技术企业重点实验室荣成264309; 3. 泰祥集团—荣成泰祥食品股份有限公司荣成264309; 4. 荣成市食品工业促进局荣成264309) 摘 要: 目的 建立微波消解-ICP-MS测定食品中33种元素的检测方法, 内标法定量。方法 试样经硝酸-过氧化氢进行微波消解、赶酸、定容后利用ICP-MS进行分析测定。本方法选用7种元素作为内标, 对分析信号的本底和基体效应具有很好的补偿作用。同时引入碰撞反应气He, 可有效去除多原子离子的干扰。结果 该方法对各元素的检出限为0.002~2.50 μg/L, 相对标准偏差RSD值在0.979%~4.96%之间, 加标回收率在83.4%~107%之间, 对有证生物成分标准物质扇贝粉样品的分析结果与所给的标准值相吻合。结论 该方法简便快捷, 灵敏度高, 重现性好, 是分析食品样品中的多元素的可靠、高效的方法。 关键词微波消解; 电感耦合等离子质谱法; 重金属 Determination of 33 kinds of metallic elements in food aquatic products and animal tissues by microwave digestion and ICP-MS method ZENG Hai-Ying1, WANG Jia-Lei1, SHEN Ping-Ping1, ZHAO Yu-Mei1, Li Yu-Jin2,LIU Yuan-Ping3, BI Zhi-Ming4, LIU Zhi-Min1* (1. Weihai Shijin Food Inspection Service Co., Ltd., Rongcheng 264309, China; 2. Shandong Provincial Key Laboratory of Processing Techology of Frozen Prepared Food (Taixiang Group), Rongcheng 264309, China; 3. Rongcheng Tai XiangFood Co., Ltd. (Taixiang group), Rongcheng 264309, China; 4. Rongcheng Food Industry Promotion Agency,Rongcheng 264309, China) ABSTRACT: Objective To establish a method for determination of 33 kinds of elements in food by microwave digestion-ICP-MS and internal standard method. Methods The samples firstly was digested, acid-driven and volume controlled ?by nitric acid-hydrogen peroxide via microwave, and then be tested by the method of ICP-MS. Seven elements were selected as internal standard, which had a good compensation for the analysis of the signal background and the matrix effect. Furthermore, Helium was used as collision-reaction gas, which could effectively get rid of the disturbance of multi-atomic ion. Results The detection limit for each element was 0.002~2.50 g/L, the relative standard deviation (RSD) was 0.979%~4.96%, and the addition standard recovery was 83.4%~107%. The analysis result of the scallop powder elements was in accordance with the given standard. Concl