新型浓缩柱富集铅的流动注射分光光度法研究  

A Research on Enrichment of Trace Amounts of Lead(Ⅱ) with a New Concentration Column by Flow Injection Analysis Spectrophotometry

作　　者：孙冬梅[1] 张新申[1] 佟玲[2] 俞凌云[1] 许鹏飞[3] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]四川大学建筑与环境学院,四川成都610065 [3]四川大学化学工程学院,四川成都610065

出　　处：《皮革科学与工程》2008年第6期52-56,共5页Leather Science and Engineering

基　　金：海水痕量金属元素现场自动分析系统的探索研究国家863攻关课题(2002AA639290)

摘　　要：采用一种新型的浓缩柱来富集水溶液中的微量Pb^2＋，并将其与流动注射分光光度法联用，对富集条件和解吸条件做了详细的研究。以1-（2-吡啶偶氮）-2-萘酚（PAN）为显色剂，并对显色体系进行了优化。在最佳实验条件下，该方法在1-80μg·L^-1的范围内，Pb^2＋的质量浓度与峰高成良好线性关系，相关系数r=0．9981。相对标准偏差为1．75%（40μg·L^-1 Pb^2＋，n=8），检出限为0．20μg·L^-1。实验表明，这种新型的浓缩柱对水溶液中的微量Ph^2＋具有良好的富集作用。A new concentration column was adopted here to enrich trace amounts of Pb^2＋ ions from aqueous solutions. The enrichment and desorption conditions were discussed by concentration column combination with flow injection spectrophotometry. Pb^2＋ can be determined with 1-（2- pyridine azo）-2-naphthol as Colour developing reagent and the Chromogenic systemsystem was optimized. Under the optimal condition, the linear range was from 1 to 80 g L^-1 of standard solutions （correlation coefficient r =0. 9981）. The relative standard deviation （RSD） was 1.75% （ n =8） obtained by injecting standard solution with 40 g L^-1 Pb^2＋. The detection limit was 0. 20 g L^-1. Consequently, this new concentration column is feasible in the enrichment of trace amounts of Pb^2＋ ions from aqueous solutions.

关 键 词：浓缩柱 PB^2+ 富集 解吸 

分 类 号：O614.433[理学—无机化学]