过氧化氢-邻氨基酚体系催化显色光度法测定微量铜

以乙酸-乙酸钠缓冲溶液（pH=5．6）为介质，过氧化氢在微量cu（Ⅱ）的催化作用下，氧化邻氨基酚显色，显色程度与Cu（Ⅱ）含量成正比。方法的最大吸收波长为463nrn，在冰水浴中反应10min，Cu（Ⅱ）含量在睢10ug·mL-1围内呈线性关系，回归方程为A=0．007c＋0．0129。此方法用于污水中微量铜的测定，RSD为3．21％（n=6），加标回收率在90．6％。109．9％之间。

Determination of Trace Copper by Catalytic Colouration Spectrophotometry in Hydrogen Peroxide-o-Aminophenol Systerm

Under the catalysis of trace Cu（ II ）, the o-aminophenol was oxided to color by hydrogen peroxide in the acetic acid- sodium acetate buffer solution medium（pH=5.6）. The maximum absorption wavelength of this method was at 463nm and the reaction time was 10 min in the ice-water bath. A linear relationship of Cu（ II ） was established in the range of 0-10 u g/mL. The regression equation of calibration curve was A=0.007c＋0.0129. This method was used to determine the trace copper in the polluted water, the RSD was 3.21% （n=6） and the recovery of standard addition was between 90.6% ~109.9 %.