研究了在表面活性剂 Tween60存在下 ,Ge( )与试剂 3,5-二溴 -4 -偶氮变色酸苯基荧光酮 (DBACPF)的显色反应和光度性质。在 0 .8mol/LH2 SO4介质中 ,Ge( )与试剂形成 1∶ 2的红色三元配合物 ,最大吸收波长为 534 nm,表观摩尔吸光系数为 1 .76× 1 0 5 L· mol- 1· cm- 1 ,Ge( )浓度在 0～ 6μg/2 5m L范围内符合比尔定律。拟定方法用于煤中微量锗的分析 ,结果令人满意 The color reaction and photometric properties of Ge () and 3,5-dibromo-4-azo chromophoric phenylfluorone (DBACPF) were investigated in the presence of Tween60. In 0.8 mol / LH 2 SO 4 medium, Ge () formed 1: 2 red ternary complex with the reagent, the maximum absorption wavelength was 534 nm, the apparent molar absorptivity was 1.76 × 105 L · mol- 1 · cm-1, Ge () concentration in the range of 0 ~ 6μg / 2 5mL Beer’s law. The proposed method was applied to the analysis of trace germanium in coal with satisfactory results