催化光度法测定环境水样中的铬(Ⅵ)

The Determination of the Cr(Ⅵ) in the Water Sample by Catalytic Photometry

研究了Ｃｒ（Ⅵ）离子对Ｈ２Ｏ２氧化孔雀石绿退色反应的催化效应及其动力学条件，从而建立了痕量铬（Ⅵ）的催化光度法．本法的测定范围为１．０～５．０μｇ／２５ｍＬ，检出限为２．５６×１０－８ｇ／ｍＬ，用该法测定环境水样中的Ｃｒ（Ⅵ），取得满意的结果．

This paper studied the catalytic effect and dynamic conditions of trace Cr(Ⅵ) on the decolorization Malachite Green by H 2O 2 hence the devtopment of method for the determination of trace Cr(Ⅵ) .The linear response was in the range of 1.0 to 5.0μg/25mL,and the detection limit in this method was 2.56×10 -8 g·mL -1 .Satisfactory results were obtained from the determination of trace Cr(Ⅵ) in the water sample.