岩矿测试2012，Vol.31Issue(3)：425-429,5.
高压密闭消解-电感耦合等离子体质谱法测定海洋沉积物中稀土元素
Determination of Rare Earth Elements in the Marine Sediments by Inductively Coupled Plasma-Mass Spectrometry with High-pressure Closed Digestion
摘要
Abstract
Using a HF-HNO3 system with high-pressure closed digestion, a method to determine concentrations of fifteen rare earth elements ( REEs) in marine sediments was studied by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Experimental conditions such as mass spectrum interferences, digestion methods and acid systems have been investigated. Compared to electric heating plate digestion and microwave digestion, high-pressure closed digestion has the advantages of using less acid, achieving complete digestion and causing less damage to the digestion process. The correction equation effectively calibrated polyatomic ions interferences formed by Ba and light rare earth elements. The marine sediment samples were dissolved completely by HF-HNO3 system, and the relative error (RE) was less than 5%. The method detection limits were 3-15 ng/g. The proposed method was validated by the marine sediment reference materials GBW 07309, GBW 07311 and GBW 07313. The results were consistent with certified values, and the relative standard deviation (RSD) and relative error were both less than 5%. The determination precision (RSD, n =6) of the Yangtze River estuary sediment samples was less than 5% , and the recoveries were 95. 8% - 104%. This method has a low detection limit with high precision and accuracy, all of which meet the requirements to analyze a large number of marine sediment samples.关键词
海洋沉积物/稀土元素/高压密闭消解/电感耦合等离子体质谱法Key words
marine sediment/ rare earth element/ high-pressure closed digestion/ Inductively Coupled Plasma-Mass Spectrometry分类
海洋科学引用本文复制引用
高晶晶,刘季花,张辉,白亚之,崔菁菁,何连花..高压密闭消解-电感耦合等离子体质谱法测定海洋沉积物中稀土元素[J].岩矿测试,2012,31(3):425-429,5.基金项目
国家自然科学基金项目(40976038) （40976038）
国家海洋局青年海洋科学基金项目(2012325) （2012325）
国家海洋局第一海洋研究所基本科研业务费项目(GY02-2009G22) （GY02-2009G22）
海洋公益性行业科研专项经费项目(201105003) （201105003）
