新型酸性光亮镀锡铜合金液中微量铜的快速测定  

Rapid Determination of Minim Copper in Newly Acidic Bright Tin-Copper Alloy Plating Bath

作　　者：罗序燕[1] 

机构地区：[1]南方冶金学院材化学院,江西赣州341000

出　　处：《材料保护》2004年第3期49-50,共2页Materials Protection

基　　金：江西省自然科学基金项目 ( 985 0 2 3 )

摘　　要：采用 5 -Br -PADAP光度法测定酸性光亮镀锡铜合金液中的微量铜 ,优选出最佳测定波长。研究了酸度 甘油浓度和显色剂浓度以及各种干扰离子对测定的影响 ,铜含量在 0～ 2 0 μg/ 2 5mL范围内 ,服从比尔定律。加标回收试验结果表明 ,该方法重复性好 ,准确度高 ,简单快速 ,回收率为 99%～ 10 2 % ,具有很好的实用价值和应用前景 。Minim copper in new acidic bright tin-copper alloy plating bath was determined by spectrophotometrie method using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol(5-Br-PADAP)as chromogenic reagent,and measuring wavelength was optimized.The effects of acidity,concentration of glycerol and chromogenic reagent,and various interference ions were studied.Beer's law was followed for copper content among 0-20μg/25 mL.Experimental results of standard addition show that the method has good repeatability and accuracy with recovery rate of 99%～102%.The method is simple,rapid and has better practicability and application prospect that is acceptable for direct determination of minim copper without separation in acidic bright tin-copper alloy plating bath.

关 键 词：铜测定 光度法 5-BR-PADAP 酸性光亮镀液 锡铜合金 

分 类 号：TQ153[化学工程—电化学工业]