摘要
本文根据钨对孔雀绿—Ti^(3+)退色反应的催化作用,对用孔雀绿选择性电极催化电位法测定痕量钨进行了研究。实验表明,与催化光度法比较,该方法灵敏度高,其线性测定范围为4—32ng/ml,选择性好,而且操作简单,温度控制方便。本文测定了几种标准钢样中的钨含量,所得结果与标准值十分接近。
A new catalytic potentiometric method for determining trace tungsten is proposed. It is based on the ungsten (Ⅵ) catalysis to the reaction between malachite green and TiCl_3. The malachite green ion selective electrode indicates the variation of the concentration of malachite green to determine the reaction velocity, and the reaction velocity is proportional, to the concentration of tungsten. The linear range of the method is 4～32ng/ml for W (Ⅵ). The method shows high sensitivity and selectivity. The content of tungsten in standard steel samples is determined. The result obtained is very close to the standard content.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1990年第1期30-33,共4页
Chinese Journal of Analytical Chemistry
关键词
钨
孔雀绿电极
催化分析
标准钢样
Tungsten
Malachite green
Ion selective electrode
Catalytic analysis
