研究了 p H4 .0— 5 .0的乙酸 -乙酸钠缓冲介质中 ,有 CTMAB存在下 ,1,5 -二 ( 2 -羟基 - 5 -氯苯 ) - 3-氰基甲月替 ( HCPCF)与铜的显色反应。铜 ( )与 HCPCF形成 1∶ 3稳定的蓝色配合物 ,λmax=62 2 nm,ε6 2 2 =3.3× 10 4 L· mol-1· cm-1,在 0— 2 4μg/2 5 m L铜浓度范围内符合比耳定律 ,可直接用于茶叶中微量铜的测定 ,结果令人满意 In the presence of CTMAB, the effects of 1,5 - bis (2 - hydroxy - 5 - chlorobenzene) -3 - cyanometabolide (HCPCF) Color reaction with copper. Copper () and HCPCF form a 1: 3 stable blue complex with λmax = 62 2 nm and ε6 2 2 = 3.3 × 10 4 L · mol -1 · cm -1. Beer’s law is obeyed in the range of copper concentration, which can be directly applied to the determination of trace copper in tea with satisfactory results