X射线荧光光谱法测定大洋多金属结核中多种元素  

Determination of 37 Elements in Oceanic Polymetallic Nodule by X ray Fluorescence Spectrometry

作　　者：李国会 王晓红 王毅民 

机构地区：[1]地球物理与地球化学勘探研究所 [2]岩矿测试技术研究所

出　　处：《岩矿测试》1998年第3期197-202,共6页Rock and Mineral Analysis

基　　金："大洋矿产资源研究开发"国家专项

摘　　要：采用粉末压片和熔融法制样，理论α系数和散射线内标法校正元素间的吸收增强效应，在３０８０Ｅ２型Ｘ射线荧光光谱仪上测定多金属结核中的Ｎａ２Ｏ、ＭｇＯ、Ａｌ２Ｏ３、ＳｉＯ２、Ｐ２Ｏ５、Ｓ、Ｃｌ、Ｋ２Ｏ、ＣａＯ、ＴｉＯ２、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎ、Ｇａ、Ａｓ、Ｓｅ、Ｂｒ、Ｎｂ、Ｚｒ、Ｙ、Ｒｂ、Ｓｒ、Ｐｂ、Ｂａ、Ｍｏ、Ｔｌ、Ｌａ、Ｃｅ、Ｎｄ、Ｔｈ、Ｕ和Ｗ等３７种组分。方法经大洋多金属结核标准物质分析验证，其分析结果与标准值符合，具有较好的准确度。经１０次重复测定同一样品，方法的精度（ＲＳＤ，ｎ＝１０）：对大多数主、次组分小于１％；其余痕量元素除Ａｓ（９％）、Ｃｒ（６％）和Ｌａ（９％）外，均小于５％。A method has been developed for the determination of 37 elements in oceanic polymetallic nodules by wavelength dispersive X ray fluorescence spectrometry (WDXRF). The specimens were prepared by both techniques of borate fusion and pressed powder pellets. Calibration was carried out with certified reference materials and synthetic standards. The absorption enhancement effects between elements were corrected using theoretical α coefficients (for major and miner elements) and the scattered radiation as internal standard (for trace elements). The accuracy of the method was evaluated by analysis of certified reference materials of GSPN 1 and GSPN 2. The precision (RSD, n =10) of the method is less than 1% for most major elements and 5% for other elements expect As (9%), Cr (6%) and La (9%).

关 键 词：多金属结核 X射线荧光法 化学组成 大洋 

分 类 号：P744.3[天文地球—海洋科学]