摘要
在 CTMAB存在下 ,In( )与 3,4 -二羟基偶氮苯 - 4′-磺酸钠 (DAS)形成 1∶ 4的络合物 ,在 518nm波长处 ,表观摩尔吸光系数为 7.4× 10 4 L· mol-1· cm-1,In( )含量在 0— 30 μg/ 2 5m L范围内服从比耳定律。萃取分离干扰离子后 ,用于铝粉中微量铟的测定 ,结果令人满意。
In the presence of cationic surfactant CTMAB,the colour reaction of DAS with In(Ⅲ)has been studied.It is estimated that the molar ratio of In(Ⅲ)to DAS in the complex is 1∶4.Molar absorptivity is 7.4×10 4L·mol -1 ·cm -1 at 518nm.Beer's Law is obeyed in the range of 0—30μg \{In(Ⅲ)\} per 25mL solution.Spectrophotometric method for the determination of In(Ⅲ)has been established and used in the determination of In(Ⅲ)in aluminum powder with satisfactory results.
出处
《光谱实验室》
CAS
CSCD
2001年第4期502-505,共4页
Chinese Journal of Spectroscopy Laboratory
