流动注射-分光光度法测定环境水样中微量铀  

Flow injection-spectrophotometric determination of micro amounts of uranium in environment water

作　　者：罗道成[1] 杨运泉[2] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]湘潭大学化工学院,湖南湘潭410005

出　　处：《化学试剂》2004年第1期25-26,共2页Chemical Reagents

摘　　要：在硝酸介质中 ,铀 (Ⅵ )可与 2 ( 3 羧基苯偶氮 ) 7 ( 4 氯 2 膦酸基苯偶氮 ) 1 ,8 二羟基 3 ,6 萘二磺酸 (CPA mK)迅速反应生成蓝色配合物 ,据此建立了一种新的测量微量铀的流动注射光度法。方法的检出限为 0 0 3 2mg/L ,U(Ⅵ )量在 0～3 5mg/L范围内符合比尔定律。方法用于测定环境水样中微量铀 ,结果满意。A new flow injection spectrophotometic method for the determination of micro amounts of uranium was established,which was based on a blue complex formed by uranium with 2-(3-carboxy phenylazo)-7-(4-chlorine-2-phosphonic phenylazo)-1,8-dihydroxy-3,6-naphthalene-disulfonic acid (CPA-mK) in the medium of nitric acid.Beer′s law is obeyed for U(Ⅵ) concentration in the range of 0～35mg/L,the detection limit of the method is 0.032 mg/L.The metheod has been applied to the determination of micro amounts of uranium in environment water with satisfactory results.

关 键 词：环境监测 微量分析 含量测定 铀 流动注射-分光光度法 环境水样 2-(3-羧基苯偶氮)-7-(4-氯-2-膦酸基苯偶氮)-1 8-二羟基-3 6-萘二磺酸 

分 类 号：X832[环境科学与工程—环境工程] X131.2