酸性铬兰k褪色指示反应动力学光度法测定微量铬

Catalytic Kinetic Spectrophotometry the Determination of Trace Chromium(VI)

本文研究了在硫酸介质中 ,微量铬催化过硫酸钾氧化酸性铬兰K褪色的指示反应 ,确立了催化动力学测定铬 (VI)的新方法。该法检出极限为 7.79× 10 -6g·L-1,测定线性范围 0 ～8.0 μg/5 0mLCr(VI) ,本法已用于电镀废水中铬 (VI)的测定。

In this paper a new catalytic method for determining trace Chromium has been studied.Chromium(VI) can catalyze the decolorization oxidation of acid chrome blue k.by crossing the sulphuric acid potassium.The detection limit of this method is 7.79×10 -6 g·L -1 .The linear range of determination is 0～8.0ug/50mLCr(VI).The method has been used to determine trace Cr(VI)in electroplation wastewater with satisfactory results.