高钼钨矿中钼对三氧化钨测定值的干扰消除研究

The Interference Cancellation Effects on the Value Determination of Tungsten Trioxide by Molybdenum Contained in High Molybdenum Tungsten Mine

高钼钨矿中钼严重干扰三氧化钨量的测定准确性,通过采用光度法测定三氧化钨中钼含量,从钨量中扣除钼量的方法,得出正确的三氧化钨含量。笔者对硫氰酸盐光度法络合剂的用量,显色酸度,催化剂的用量,还原剂和显色剂的用量及显色体系的稳定性进行了实验,选取了最佳吸收波长。

The molybdenum associated in tungsten ore poses serious interference on the content determination accuracy of tungsten trioxide.The correct tungsten trioxide content is obtained by reducing the molybdenum content in tungsten trioxide from the tungsten amount.This paper makes experimental studies on the following aspects： the amount of complexing agent thiocyanate spectrophotometry,color acidity,amount of catalyst,amount of reducing agent and reagent and the stability of color system.The optimal absorption wavelength is selected.