流动注射法在线测定氨性废水中的镍  

On-line determination of nickel in ammoniacal waste water by flow injection ayalysis

作　　者：李继东[1] 王长华[1] 郑永章[1] 伍星[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《分析试验室》2004年第12期6-8,共3页Chinese Journal of Analysis Laboratory

摘　　要：在过硫酸铵存在下,丁二酮肟与氨性水溶液中微量镍生成可溶性酒红色络合物。据此采用反相流动注射光度分析法,建立了在线测定氨性废水中镍的方法。在最大吸收波长440nm处进行在线光度测定,采样频率60次 h。方法测定下限为0.04μg mL,RSD小于1%,加标回收在95%～105%。方法可用于水样分析。A reversed flow injection on-line analysis spectrophotometric method for determination of nickel in ammoniacal waste water based on the formation of soluble colorized ion association complex with diacetyldioxime in the presence of ammonia peroxy-disulfate was established. The maximum absorption of the complex was at 440 nm and the sampling frequency was 60 times per hour. The determination limits for nickel was 0.04 μg/mL. The precision of measurement was less than 1% RSD and the recoveries of standard addition were 95%～105%. The method was applied to the determination of nickel in ammoniacal waste water with satisfactory results.

关 键 词：反相流动注射 光度法 在线分析 镍 

分 类 号：O557.32[理学—热学与物质分子运动论]