研究了新试剂 1 ,5-二 ( 2 -羟基 - 5-溴苯 ) - 3-氰基甲 ( HBPCF)与铜的显色反应 ,在p H=3.6的乙酸 -乙酸钠介质中 ,Cu( )与 HBPCF反应生成蓝色配合物 ,在 630 nm处有最大吸收 ,表观摩尔吸光系数为 2 .8× 1 0 4 L· mol- 1· cm- 1,Cu( )浓度在 0～ 2 5μg/2 5m L范围中皆服从比耳定律。该试剂在此条件下选择性很好 ,可应用于茶叶、绿豆及铝合金中微量铜的直接测定 ,结果令人满意。 The color reaction of the new reagent 1, 5 - bis (2 - hydroxy - 5 - bromobenzene) - 3 - cyanomethylchloramide with copper was studied. In the acetic acid - () With HBPCF to produce the blue complex with the maximum absorption at 630 nm, the apparent molar absorptivity of 2.8 × 10 4 L · mol -1 · cm -1 and Cu 2+ concentration of 0 ~ 2 5μg / 2 5m L range obey Beer’s law. The reagent under this condition has good selectivity and can be applied to the direct determination of trace copper in tea, mung bean and aluminum alloy with satisfactory results.