铜合金中六价铬的测定  

Determination of Cr^(6+) in The Copper Alloys

作　　者：陈晓东[1] 麦丽碧[1] 许洁瑜[1] 杨勇[1] 叶志飞[1] 李颖[1] 熊文[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院)分析测试中心,广东广州510651

出　　处：《广东化工》2013年第16期203-204,共2页Guangdong Chemical Industry

摘　　要：文章用二苯碳酰二肼光度法测定铜合金中六价铬的含量。研究了吸收波长、酸度、显色剂用量、显色时间以及干扰离子等因素对测定的影响,确定了最大吸收波长及反应最佳条件。用本法测定样品,相对标准偏差为0.12%～0.32%(n=7),回收率在99.8%以上,本法与ICP法测定结果吻合。Diphenylcarbohydrazide spectrophotometric method used to determine hexavalent chromium in the copper alloys was introduced. The influence of absorption wavelength, acidity, the dosages of chromogenic reagent, coloring time and interfering ions was tested. The maximumabsorption and optimum working conditions were determined. The method was applied to determination of hexavalent chromium in the copper and copper alloys with the RSD of 0.12 %0.32 %（n-7）, and the recovery was more than 99.8 %.The measured results by this method were in good agreement with those obtained by ICP.

关 键 词：六价铬 光度法 测定 

分 类 号：O65[理学—分析化学]