摘要
基于在硫酸介质中，抗坏血酸存在下，钒对溴酸钾氧化结晶紫的催化褪色作用，建立了催化褪色法测定超痕量钒的新方法。该法线性范围５～８０ｎｇ／２５ｍＬ，灵敏度为２０×１０－１０ｇ／ｍＬ。方法用于水中钒的测定，结果满意。
A Simple and sensitive catalytic discolored method has been developed for determining trace vanadium. It is based on the catalysis of V(Ⅴ) to discoloration of crystal violet oxidized with potassium bromate in diluted sulfuric acid medium in the presence of ascorbic acid, The linear range of determination is from 5 to 80ng/25mL V(Ⅴ). The sensitivity is 2×10-10g/mL. This method is applied to the determination of trace vanadium in natural water with satisfactory result.
出处
《四川农业大学学报》
CSCD
1998年第2期196-198,共3页
Journal of Sichuan Agricultural University
关键词
结晶
催化褪色
钒
超痕量
测定
CRYSTAL VIOLET CATALYTIC DISCOLORED VANADIUM.
