亮绿SF-过氧化氢体系催化动力学光度法测定痕量钒

Determination of Trace Vanadium by Catalytic Kinetic Spectrophotometry in Light Green SF-hydrogen Peroxide System

在硫酸介质中，痕量钒（V）能明显催化过氧化氢氧化亮绿SF褪色，通过研究该反应的最佳实验条件和动力学参数，建立了测定痕量钒的新催化动力学光度法。该方法选择性强、操作简便、快速，其线性范围为0．0～40ng／mL，检出限为5．2ng／L。方法用于水样及茶叶中痕量钒（V）的测定，结果满意。

Based on the catalytic effect of vanadium on the discoloring reaction of light green SF oxidized by H2 02 in medium of sulfuric acid, a new method for the determination of vanadium（ V ） was proposed. The optimum determination condition and kinetic parameters have been investigated. The detection limit is 5.2 ng/L with linear range of 0. 0 - 40 ng/mL for vanadium （ V ）. The method has been applied to the determination of trace vanadium in water and tea samples with satisfactory results.