铟(Ⅲ)-7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠的配位吸附波及其应用  

Polarographic Adsorption Wave of Indium-Sodium-7-( 1-benzeneazo)-8-hydroxyquinoline-5-sulfonate Complex and Its Application

作　　者：周长利[1] 罗川南[1] 李慧芝[1] 卢燕[1] 

机构地区：[1]济南大学应用化学系,济南250022

出　　处：《分析化学》2002年第2期186-188,共3页Chinese Journal of Analytical Chemistry

摘　　要：在ｐＨ４．５的 ０．０１５ ｍｏｌ／Ｌ ＨＡｃ－ＮａＡｃ介质中，Ｉｎ铟（Ⅲ）－７－（１－苯偶氮）－８－羟基喹啉－５－磺酸钠（ＢＱ）在滴汞电极上于－０．６６５－０．７０ Ｖ（ｖｓ．ＳＣＥ）电位处得到络合物的吸附还原波，其一阶导数峰电流Ｉ＇ｐ与Ｉｎ（Ⅲ）浓度在４．０× １０^（－８）～３．５ × １０^（－６）ｍｏｌ／Ｌ范围内呈良好的线性关系，检测限为１．６ × １０^（－８）ｍｏｌ／Ｌ Ｉｎ（Ⅲ）．应用该法测定了铅粉和氢氧化铝样品中的微量铟，结果令人满意。对电极反应机理进行了探讨。In a buffer solution of 0.015 mol/L HAc-NaAc(pH 4.5), the complex of Indium(Ⅲ)-sodium-7-( 1-benzeneazo)-8-hydroxyquinoline-5-sulfonate( BQ) was adsorbed on the surface of mercury electrode and produced a reduction peak at-0.665 ～-.0 .70 V( vs. SCE). The detection limit and the linear range of the concentration of In(Ⅲ) to the single-sweep first order derivative osilloplarographic peak current(I'p) were 1 .6-10^(-8) mol/L and 4.0 × 10^(-8)-3.5 × 10^(-6) mol/L In(Ⅲ) respectively. The method has been applied to the determination of trace In(Ⅲ) in aluminium hydroxide and lead powder with satisfactory results . The mechanism of the eletrode process has also been discussed.

关 键 词：7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠 铟 配位吸附波 应用 测定 微量分析 

分 类 号：O657.1[理学—分析化学]