电感耦合等离子体质谱法同时测定矿石中钨钼铜

Simultaneous determination of tungsten,molybdenum and copper in ores by inductively coupled plasma-mass spectrometry

研究了过氧化钠碱熔-柠檬酸络合钨-盐酸酸化,电感耦合等离子体质谱法同时检测矿石中钨、钼、铜三种元素的分析方法。对助熔剂用量,柠檬酸用量,盐酸用量进行了条件实验,确定了样品处理方法;对分析检测仪器参数进行了优化,筛选了仪器测量条件;用标准物质验证了分析方法正确度和精密度,相对误差均小于4%,相对标准偏差(RSD,n=12)均小于5%。本分析方法实现了在同一体系中对钨、钼、铜的同时快速检测,检测范围适合常量和微量钨、钼、铜的分析。

A method for simultaneous determination of tungsten, molybdenum and copper in ores was established by inductively coupled plasma mass spectrometry after sodium peroxide fusion-citric acid complex with tungsten-hydrochloric acid acidification. The conditional experiments of flux dosage, citric acid dosage and hydrochloric acid dosage were carried out to obtain sample treatment method. The instrumental parameters for analysis were optimized. The measuring conditions of instrument were selected. The accuracy and precision of analytical method were verified by certified reference ma- terial. The relative errors were smaller than 4 ~. The relative standard deviations （RSD, n= 12） were smaller than 5 ~. The rapid simultaneous determination of tungsten, molybdenum and copper was realized in the same system. The detection range of method was applicable to the analysis of mac- ro and micro amount of tungsten, molybdenum and copper.