二甲酚橙分光光度法测定化学镀镍液中的铅浓度  

Determination of Lead in Electroless Nickel Plating Solution by Xylenol Orange Spectrophotometry

作　　者：窦国金[1] 郑莹[1] 麦欣欣[1] 高灿柱[1] 

机构地区：[1]山东大学环境科学与工程学院,山东济南250100

出　　处：《材料保护》2012年第5期72-74,88,共3页Materials Protection

摘　　要：化学镀镍液中的镍离子对铅离子浓度测定的干扰较大。先将化学镀镍液中的铅离子与镍离子分离,再用二甲酚橙分光光度法测定镀镍液中铅的浓度。结果显示:当化学镀镍液中镍/铅浓度比<120时,可以直接用分光光度法进行测定;当镍/铅浓度比>120时,需先将镍离子与铅离子分离,再用分光光度法测定。该方法快速、简捷、误差小,是一种测定化学镀镍液中铅浓度的好方法。Ni2+ and Pb2+ in electroless Ni plating solution were separated,and then the concentration of Pb2+ was determined by xylenol orange spectrophotometry.It was found that the concentration of Pb2+ in electroless Ni plating bath could be directly determined by spectrophotometry when the concentration ratio of Ni2+ to Pb2+ was below 120.However,when the concentration ratio of Ni2+ to Pb2+ was above 120,it needed to separate Ni2+ and Pb2+ at the first step,and then to determine the concentration of Pb2+ by spectrophotometry.The established method was facile and could be readily used to determine the concentration of Pb2+ in electroless Ni plating bath with a small relative error.

关 键 词：检测分析 分光光度法 化学镀镍液 铅浓度 二甲酚橙 

分 类 号：O657.3[理学—分析化学]