目前,关于光度法测定痕量铜的方法很多,其中应用催化光度法测定痕量铜也有报道.本文采用具有助发色基团的2,4-二硝基苯肼在氯酸钾的催化作用下,与变色酸偶合,然后与Cu(Ⅱ)配合显色,反应机理如下:(?)试验确定了反应最佳条件,配合物的表现摩尔吸光系数ε=2.43×10~5L·mol~(-1)·cm~(-1),铜量在1 At present, there are many methods for the determination of trace copper by spectrophotometry, in which the determination of trace copper by catalytic spectrophotometry has also been reported.Under the catalytic action of 2,4-dinitrophenylhydrazine with chromophore, The reaction mechanism was as follows: (?) Test to determine the optimum reaction conditions, the performance of the complex molar absorption coefficient ε = 2.43 × 10 ~ 5L · mol ~ (-1) ) · Cm ~ (-1), the amount of copper is 1