络合吸附波测定痕量锡(Ⅳ)  

Polarographic Adsorption Wave of Tine(Ⅳ)-Sodium-7-(1-Benzenazo)-8-Hydroxquinoline-5-Sulfonate Complex

作　　者：周长利[1] 卢燕[2] 李竹云 李秀玲[2] 贺季文 

机构地区：[1]中国科学院兰州化学物理研究所 [2]山东建筑材料工业学院应用化学系,济南250022

出　　处：《分析化学》1999年第6期672-675,共4页Chinese Journal of Analytical Chemistry

摘　　要：在pH4.0的0.06mol/L HAc-NaAc介质中,Sn(Ⅳ)与7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠(BQ)形成的络合物于-0.58 V(vs.SCE)处得到一良好的吸附还原波,二阶导数波高与Sn(Ⅳ)浓度在1.0×10^(-7)～4.0×10^(-6)mol/L范围内呈线性关系;检出限5.5×10^(-8)mol/L.该法用于测定冶金样品中痕量锡(Ⅳ),结果较好.对络合物组成和电极反应机理进行了研究.In a buffer solution of 0.06 mol/L HAc-NaAc (pH 4.0), the complex of Tin(Ⅳ)-sodium-7-(1-Benzeneazo)-8-Hydroxquinoline-5-Sulfonate(BQ) was adsorbed on the surface of mercury electrode and produced a reduction peak at -0.58 V(vs.SCE). The detection limit and the linear range of theconcentration of Sn( IV) to the single-sweep second order derivative osillopolarographic current ( Ip ) were5.5×10-8 mol/L and 1.0×10～7～4.0×10-6 mol/L Sn(Ⅳ), respectively. The method has beenapplied to the determination of trace Sn (Ⅳ) in steel with satisfactory results. The mechanism of theelectrode process has also been studied

关 键 词：BQ 配合吸附波 测定 锡 极谱法 

分 类 号：O614.432[理学—无机化学]