【摘要】 <正> 有关铜的催化显色反应已有不少研究,Cu²⁺催化过氧化氢氧化多元酚的反应也有报导,但卤阴离子和Al³⁺对该反应的活化作用是最近才发现的。本文研究了Cu²⁺-没食子酸（GA）-H₂O₂催化显色体系,发现F^-、Cl^-、Br^-对该体系具有活化作用,适宜浓度的Cl^-可使该反应灵敏度提高十倍,若再加入Al³⁺,还可以大大加快反应速度。没食子酸与邻苯二酚相比性质较稳定,水中溶解度颇大,易于配制和保存。基于该反应拟订了测定铜的催化光度法,用于测定血清和纯锌样品中的痕量铜,结果尚好。更多还原

【Abstract】 The catalytic colour reactions of Cu-gallic acid-hydrogen peroxide-activator system have been studied Cl^- and Al³⁺ are good activators for the system. In the presence of NaCl, the determination limit of copper is down from 6x10^-3M to 6x10^-7M, while in the presence of Cl^- and Al³⁺, down from 6x10^-8M to 6x10^-8 M. The interference of diverse ions has been studied. A highly sensitive cataly-tic spectrophotometric method is proposed for the determination of microamoun- ts of Cu in high-purity Zn and in blood serum.更多还原