催化显色光度法测定痕量铜  

DETERMINATION OF TRACE COPPER BY CATALYTIC COLOURATION SPECTROPHOTOMETRY

作　　者：施先义 邓必阳[2] 梁少俊[2] 

机构地区：[1]河池民族工业中等专业学校,广西河池547000 [2]广西师范大学化学化工系,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2002年第2期65-68,共4页Journal of Guangxi Normal University:Natural Science Edition

摘　　要：在乙酸 -乙酸钠 (p H5 .8)介质中及活化剂邻菲罗啉存在下 ,铜 ( )催化过氧化氢氧化邻氨基酚显色 ,建立了催化显色光度法测定痕量铜的新方法 .在 1 9°C下反应 8min,测定的线性范围为 0 .0 0 5～ 0 .1 8mg/L铜 ( ) ,回归方程为 A=0 .2 793 c-0 .0 0 6,相关系数为 0 .9988.方法用于自来水、野生甜茶、罗汉果中铜的测定 ,结果满意 .A new catalytic colouration spectrophotometry has been developed for the determination of trace copper.The method is based on the copper(Ⅱ) catalyzed oxidation of o- aminophenol by hydrogen peroxide in the presence of 1,10-phenanthroline as an activative regent in acetate medium (pH5.8).With the reaction being kept running for 8 minutes at room temperature,the determined range of copper is 0.005～0.18mg·L -1 and the regression equation of calibration graph is A=0.2793 c-0.006 with a correlation coefficient of 0.9988.The method is used to determine trace copper in type-water,wild sweet tea and momordica grosvenori,with satisfactory results.

关 键 词：催化显色光度法 显色反应 邻氨基酚 铜 含量测定 邻菲罗啡 过氧化氢 

分 类 号：O614.121[理学—无机化学] O657.32[理学—化学]