偏硼酸锂碱熔-电感耦合等离子体发射光谱法测定硫化物矿中硅酸盐相的主成分  

Determination of Major Components in Silicate Phase of Sulphide Ores by ICP-AES with Lithium Metaborate Fusion Sample Pretreatment

作　　者：马生凤[1] 温宏利[1] 巩爱华[1] 屈文俊[1] 曹亚萍[1] 

机构地区：[1]国家地质实验测试中心,北京100037

出　　处：《岩矿测试》2009年第6期535-540,共6页Rock and Mineral Analysis

基　　金：国家地质实验测试中心基本科研业务费项目资助(121235068101801)

摘　　要：通过实验发现偏硼酸锂不能有效分解硫化物矿,但可有效分解其中以氧化物存在的造岩元素,从而可测定硫化物矿中硅酸盐相的二氧化硅、三氧化二铝、氧化钙、氧化镁、氧化钾、氧化钠、二氧化钛、氧化锰、五氧化二磷共9个主要组分。实验确定了用电感耦合等离子体发射光谱法测定硫化物矿的分解条件及测定条件。对铜、铅、锌（银）矿石与精矿成分分析标准物质GBW 07162-GBW 07168以及硫化物单矿物标准物质GBW 07267-GBW 07270进行分析测定,方法精密度（RSD）〈7%,准确度（RE）〈5%,能够满足样品分析中各元素定量分析的要求。同时向定值不全的硫化物标准物质中加岩石标样GBW 07105做流程加标试验,回收率大部分在90%-110%。Sulphide ores can＇t be completely decomposed by LiBO2 flux, but petrogenetic elements existed in oxide form was decompounded completely. Therefore, a method for the determination of major components in silicate phase of sulphide ores, including SiO2, Al2O3, CaO, MgO, K2O, Na2O, TiO2, MnO and P2O5 by inductively coupled plasma-atomic emission spectrometry （ICP-AES） with lithium metaborate fusion sample pretreatment was proposed. The sample dissolution parameters and ICP-AES instrument operating condition were studied and optimized. The accuracy and precision of the method were tested by analyzing different National Standard Reference Materials. The results were in good agreement with the certified values with accuracy of RE 〈 5% and precision of 〈 7% RSD. The recovery of these components in sulphide ores was 90% -110%. The method has been successfully used in routine analysis of sulphide ores.

关 键 词：偏硼酸锂 电感耦合等离子体发射光谱法 硫化物矿 造岩元素 

分 类 号：O657.31[理学—分析化学] P578.2[理学—化学]