流动注射-催化分光光度法直接测定海水中的痕量铜  

Direct Determination of Trace Copper(Ⅱ) in Seawater by Flow Injection Catalytic Photometry

作　　者：魏良[1] 张新申[2] 代以春[3] 谢永红[2] 黄进[2] 肖凯[2] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川大学轻纺与食品学院,四川成都610065 [3]四川科学城神工环保科技有限公司,四川绵阳621900

出　　处：《皮革科学与工程》2008年第5期52-55,共4页Leather Science and Engineering

基　　金：国家863项目(编号:2006AA09Z173)

摘　　要：在pH=8．0的NH4Cl-NH3·H2O缓冲液中，以丙氨酸为增敏剂，铜能催化H2O2还原中性红褪色，据此建立了流动注射一催化分光光度法直接测定海水中的痕量铜。铜含量在2．0～32．0μg／L质量浓度范围内符合比尔定律，检出限为0．12μg／L，平行测定10．00μg/L铜14次，相对标准偏差为1．3％。方法用于实际海水样品分析，回收率在97．2％～105．2％之间。It is found that the copper can catalyze the fading reaction of neutral red reduced by hydrogen peroxide using the alanine as a sensitizer in NH4Cl-NH3H2O medium（pH=8.0）. Based on this method, a new flow injection catalytic photometric method was proposed for determination of trace copper in seawater. Beers law is obeyed in the concentration range of 2. 0～32. 0μg/ L of copper. The relative standard deviation of 1.3% was obtained by injecting 10.00μg/L copper of standard solution （ n = 14）. The＇detection limit calculated from three times of the average background noise was 0. 12 μg/L. The recoveries of sea samples were between 97.2% and 105. 2%.

关 键 词：铜(П) 中性红 催化光度法 流动注射分析 丙氨酸 

分 类 号：X834[环境科学与工程—环境工程]