微波消解ICP-MS测定海洋沉积物中微量元素  

DETERMINATION OF TRACE ELEMENT IN SEDIMENT BY MICROWAVE DIGESTION-ICP-MS

作　　者：王彦美[1] 张欣[1] 陈道华[1] 郑凯清[1] 

机构地区：[1]广州海洋地质调查局国土资源部海洋监测中心,广州510760

出　　处：《化学分析计量》2010年第6期25-28,共4页Chemical Analysis And Meterage

基　　金：国土资源部中国地质调查局引进现代分析测试设备配套方法研究项目(1212010816025);中国科学院可再生能源与天然气水合物重点实验室开放基金项目(0907k8)

摘　　要：采用微波消解一电感耦合等离子体质谱（ICP—MS）法同时测定海洋沉积物中的Cr、co、Ni、Cu、zn、cd、Ph7种微量元素。对微波消解酸体系和微波程序进行了优化，结果表明：由4mL HNO，与2mLHF组成的混合酸对沉积物消解效果好；阶段升温，最高温度200℃，消解30min有着最佳的消解效果。采用本实验方法对7种不同类型的海洋沉积物标准物质进行了测定，测定结果与标准值一致。各元素的检出限在0．009～0．17ng／g之间。该方法快速简便、准确度高，可用于海洋沉积物样品中多元素同时测定。7 kinds of elements which included Cr, Co, Ni, Cu, Zn, Cd, Pb in sediment were determined by microwave digestion - ICP - MS. Large numbers of experiment indicated that the mixture of 4 mL HNO3 and 2 mL HF were found to give the best digestion results towards sediment type of samples. The best microwave heating program was that 3 steps to the top temperature, and keeping 30 minutes at 200℃. Seven kinds of national standard reference materials were tested by this method, and the test - values accorded with the standard values. The method detection limits for 7 kinds of elements were 0. 009 - 0.17 ng/g. The method is rapid and simple with high accuracy and can be widely applied to the determination of sediment samples.

关 键 词：微波消解 ICP—MS 海洋沉积物 微量元素 

分 类 号：O657.63[理学—分析化学]