ICP-MS法测定英德红茶中的45种元素  

Determination of 45 elements in Yingde black tea by ICP-MS

作　　者：张先彩 张春华[2] 黄晓兰[2] 吴惠勤[2] ZHANG Xian-cai1,2,3, ZHANG Chun-hua2, HUANG Xiao-lan2,WU Hui-qin2(1. Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China; 2. Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Institute of Analysis, Cruangzhou , Guangdong 510070, China; 3. University of Chinese Academy of Sciences, Beijing 100049, Chin)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国广州分析测试中心广东省分析测试技术公共实验室,广东广州510070 [3]中国科学院大学,北京100049

出　　处：《食品与机械》2018年第2期62-66,96,共6页Food and Machinery

基　　金：广东省科技计划项目(编号:2015A030401065)

摘　　要：采用微波消解-电感耦合等离子体质谱法测定英德红茶中的45种元素,试验结果表明,45种元素的线性关系良好,相关系数在0.999 5以上,各元素的检出限为0.000 1~20.090 0μg/L,加标回收率为82.58%~119.19%,相对标准偏差(RSD)为0.20%~7.03%,除Sb外,其他元素精密度RSD为0.15%~9.14%,采用茶叶标准样品(GBW10083)对该方法进行验证,除Cd略低于标准值外,其他元素的测定值均在标准值范围之内。该方法在线性相关性、检出限、精密度、准确度和加标回收率方面均满足实际样品测定要求,具有快速简便、准确可靠等优点。The inductively coupled plasma mass spectrometry（ICPMS）combined with microwave digestion was employed in this study for the determination of forty five elements in Yingde black tea.The results showed that 45 elements had good linearity and correlation coefficients all greater than 0.999 5.The limits of detection（LODs）were ranged from 0.000 1 to 20.090 0μg/L.The recovery rates were between 82.58% and 119.19% with the relative standard deviations（RSDs）of 0.20%-7.03%.The RSD of all the elements except Sb was 0.15%-9.14%in precision experiments.The method was validated by standard reference material（GBW10083）, the determination values of elements other than Cd are all within the standard value range.It showed that the method had the advantages of rapidness,simplicity and accuracy,which met the requirements of sample determination in terms of linearity, detection limit,precision,accuracy and recovery rate.

关 键 词：电感耦合等离子体质谱 微波消解 茶叶 元素 

分 类 号：O657.63[理学—分析化学] TS272.7[理学—化学]