孔雀绿-PVA-磷钼酸铵分光光度法测定无铅锡基焊料中磷含量  

Determination of Phosphorus Content in Lead Free Tin Based Solder with Malachite Green-PVA-Ammonium Phosphomolybdate Pectrophotometry

作　　者：李丽 段泽平 韩红兰 孙彪 许金泉 黄慧兰 LI Li;DUAN Zeping;HAN Honglan;SUN Biao;XU Jinquan;HUANG Huilan(Yunnan Tin New Material Company Limited,Kunming 650500,China)

机构地区：[1]云南锡业新材料有限公司,云南昆明650500

出　　处：《湖南有色金属》2024年第4期109-114,共6页Hunan Nonferrous Metals

摘　　要：文章提出了孔雀绿-PVA-磷钼酸铵以三元络合物体系测定无铅锡基焊料中磷的方法,且能稳定存在于含有聚乙烯醇的水溶液中。缔合物最大吸收峰值位于600 nm波长处,波尔吸收系数ε=8.27×10^(4)L/mol·cm。线性回归方程为y=9.6731x-0.0761,相关系数为0.9995,25 mL溶液中磷质量在1~6μg范围内符合Lambert-Beer定律。测定无铅焊料中磷含量相对标准偏差0.80%~2.95%(n=11),加标回收率在96.59%~104.45%。优化样品前处理方式,缩短了样品前处理时间。该法显色酸度范围宽、共存离子干扰性小、选择性好、显色稳定时间长,准确度较高,易于操作。A method for determination of phosphorus in lead-free tin based solder using a ternary complex system of peacock green-PVA-ammonium phosphomolybdate was proposed,which can stably exist in aqueous solutions containing polyvinyl alcohol.The maximum absorption peak of the complex is located at a wavelength of 600 nm,and the Bohr absorption coefficientε=8.27×10^(4) L/mol·cm.The linear regression equation is y=9.6731x-0.0761,with a correlation coefficient of 0.9995,and the mass of phosphorus in a 25 mL solution conforms to Lambert Beer's law within the range of 1~6μg.The relative standard deviation for determining the phosphorus content in lead-free solder is 0.80%to 2.95%(n=11),and the recovery rate for spiking is 96.59%to 104.45%.Optimized the sample pre-treatment method and shortened the sample pre-treatment time.The colorimetric acidity range of this method is wide,the interference of coexisting ions is small,the selectivity is good,the colorimetric stability time is long,the accuracy is high,and it is easy to operate.

关 键 词：磷含量 孔雀绿 PVA 分光光度法 无铅焊料 

分 类 号：TG115.33[金属学及工艺—物理冶金]