新型浓缩柱富集-流动注射光度法测定水中的痕量铜  

Determination of trace copper in river water by the concentration column-flow injection spectrophotometry

作　　者：赵欢欢[1] 张新申[2] 曹凤梅 李辉[1] 陈淑娟[2] 

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

出　　处：《分析试验室》2012年第7期16-19,共4页Chinese Journal of Analysis Laboratory

基　　金：国家863计划项目(2007AA092001-5)资助

摘　　要：以二乙氨基二硫代甲酸钠(DDTC)分光光度法为基础,将新型浓缩柱在线富集与流动注射联用以测定水中痕量Cu2+,对浓缩柱的富集、解吸条件以及流动注射参数进行了考察。在最佳条件下,在0.25～45μg/L的范围内,Cu2+的浓度与峰高呈良好线性关系,其线性方程为:y=3.0553ρ+4.2244(R2=0.9984),检出限为0.082μg/L,相对标准偏差(RSD)为3.1%(25μg/L Cu2+,n=10)。利用本方法测定河水中的痕量铜,回收率在95.6%～99.6%之间。Based on DDTC spectrophotometry,a new on-line column preconcentration system combined with flow injection analysis（FIA） was adopted to determinate trace amounts of Cu2＋ in river water.The conditions of enrichment and desorption from the concentration column and parameters for flow injection were investigated in detail.Under optimal conditions,there was an excellent linearity between the absorption peak height and concentration of Cu2＋ in the range of 0.25~45 μg/L,with a detection limit of 0.082 μg/L and a relative standard deviation of 3.1%（25 μg/L Cu2＋,n = 10）.The linear regression equation was y = 3.0553x ＋ 4.2244（R2 = 0.9984）.Finally,the system was used for the determination of trace amounts of Cu2＋ in river water,and recoveries were from 95.6% to 99.6%.

关 键 词：铜 流动注射 浓缩柱 

分 类 号：O657.3[理学—分析化学]