【摘要】 研究了在ＨＡｃ－ＮａＡｃ介质中间磺基偶氮氯膦（ＣＰＡｍｓ）分光光度法测定Ｃｒ（Ⅲ）的最佳条件。在ｐＨ４．６条件下，ＣＰＡｍＳ与Ｃｒ（Ⅲ）形成的配合物最大吸收位于６２２ｎｍ，摩尔吸光系数ε＿ｍａｘ＝２．９９×１０￣４，有色物质的组成为Ｃｒ（Ⅲ）：ＣＰＡｍＳ＝１：１，１～２５μｇ／２５ｍｌ的铬（Ⅲ）符合比尔定律。方法用于钢样及人发中铬的测定，得到了满意的结果。更多还原

【Abstract】 The spectrophotometric determination of chromium with m- sulfochlorophosphonazo in HAc-NaAc mediumat pH 4．6 was studied. There is a maximum absorbance at 622nm and the apparent molar absorptivity is 2．99×10~4Beer’s lawis followed in the chromium concerntration10Mh｛chanel concernmation range of 1-25μg in 25ml of solution. This method has been successfully applied to determine chromium im steel and human hair samples. The results obtained are satisfactory.更多还原