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:在 p H3 .50酸性介质中 ,Cu( )和 Fe( )在非离子表面活性剂 Tween-80存在下与 5-Br-PADAP生成有色配合物 .有色配合物最大吸收波长都位于 570 nm处 ;表观摩尔吸光系数分别为 7.96× 1 0 4 L· mol-1· cm-1和 6.3 0× 1 0 4 L· mol-1· cm-1;Cu( )在 0~ 1 3μg/2 5ml,Fe( )在 0~ 1 8μg/2 5ml范围内符合比耳定律 .用拟定的方法测定了铝片和水样中的 Cu( )和 Fe( ) ,结果令人满意
: Cu () and Fe () in the pH3.5 acidic medium produced a colored complex with 5-Br-PADAP in the presence of the non-ionic surfactant Tween-80.The maximum absorption wavelength of the colored complex was at 570 nm ; The apparent molar absorptivity was 7.96 × 10 4 L · mol -1 · cm -1 and 6.3 × 10 4 L · mol -1 · cm -1 respectively; , Beer ’s law was obeyed by Fe () in the range of 0 ~ 18μg / 25ml.The results of Cu (superscript 2 +) and Fe