钽铁、铌铁精矿中钨量的测定

摘要

研究了硫氰酸钾分光光度法测定钽铁、铌铁精矿中钨量,对络合剂、还原剂和显色剂的用量进行实验,考察了共存离子的干扰情况,选取了最佳吸收波长.实验结果表明,该法精密度和准确度均好,操作简单.适用钽铁、铌铁精矿中0.10％～10.00％钨的测定.%This paper studies an analytical method to determine tungsten trioxide content in niobium iron and tantalum iron concentrates by thiocyanate photometric. The choice of complexing agents, reducing agents and the amount of reagent were tested to select the best absortion. Experimental results show that the method precision and accuracy are favorable and easy to operate. The measurement range is 0.10 %~10.00 %.