铜催化抗坏血酸还原酸性铬深蓝动力学光度法测定痕量铜  

KINETIC PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF COPPER BY ITS CATALYTIC EFFECT ON THE REDUCTION OF ACID CHROME DARK BLUE WITH ASCORBIC ACID

作　　者：王术皓[1] 杜凌云[1] 张爱梅[1] 李大成[1] 马春林[1] 

机构地区：[1]山东聊城师范学院化学系,聊城252059

出　　处：《理化检验（化学分册）》1999年第9期408-409,412,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在乙酸-乙酸钠介质中,以邻菲罗啉为活化剂,铜对抗坏血酸还原酸性铬深蓝具有强烈的催化作用,测定了反应的表观活化能,探讨了反应机理,建立了测定痕量铜的催化动力学新方法,测定的线性范围为2.5～60ng·ml^(-1),直接用于食品及人发中铜的测定。结果满意。It is found that in a HOAc-NaOAC buffer medium, the reduction of acid chrome dark blue by ascorbic acid is catalyzed by Cu( 1 ) ion and is activated by 1,10-phenanthroline. A brief discussion on the mechanism of this reaction is given and the apparent activation energy is also determined. Base on this phenomenon a new kinetic photometric method for the determination of trace amounts of copper is established- The linear range of the determination of copper is between 2.5~60ng ?ml^(-1). This method has been used in the determination of copper in some food samples and human hair samples and the results obtained are satisfactory.

关 键 词：测定 铜 酸性铬深蓝 催化光度法 

分 类 号：O614.121[理学—无机化学]