岩石标准物质均匀性的XRF检查法  

A Study on Homogeneity Test of Powdered Rock Reference Materails by XRF Method

作　　者：颜茂弘 鲍琪儿 王祖荫 应志春 梁国立[1] 罗代洪 Yan Maohong;Bao Qier;Wang Zuyin;Ying Zhichun;Liang Guoli;Luo Daihong

机构地区：[1]中国地质科学院岩矿测试研究所

出　　处：《岩矿测试》1988年第1期61-64,I0011,共5页Rock and Mineral Analysis

摘　　要：长期以来岩石标准物质均匀性检查多系采用方差分析F检验作包装单元(使用单元)间的均匀程度一致性检验。这种检验以假定单元内物质分布均匀为前提,而对单元内物质分布是否足够均匀未作实际检验。本文主要探讨用XRF法作标准物质均匀性检查的一些问题。This paper deals with a method of test for the homogeneity of powdered rock reference materials by means of X-ray fluorescence method.The method is simple, rapid and precise and is able to perform multi-element analysis. A conventi- onal method is used "to detect whether the between-unit (long range) variation is statistically significant compared with the vvithin-unit (short range) variation. An XRF method is designed to detect whether the within-unit (short range) variation is statistically significant compared with the known variation of the measurement method as well. The bias of measurement method is separated from the total variance, and a quantitative measure for the inhomogeneity of a material is obtained.Any drift on the XRF signal can be judged by correlation analysis. A formula for calculating the actual subsample mass of XRF determination is derived.The statistical values of F and t are obtained directly from the output of the XRF instrument by a computerized data processing programme.

关 键 词：一致性检验 检查法 方差分析 均匀程度 XRF法 F检验 均匀性 单元内 

分 类 号：G63[文化科学—教育学]