锑-铜-茜素络合剂体系极谱行为的研究  

Studies on Polarographic Behavior of Antimony copper Alizarin Complexone System

作　　者：彭晖[1] 黎拒难[1] 

机构地区：[1]湘潭大学化学化工学院

出　　处：《分析试验室》1998年第4期30-33,共4页Chinese Journal of Analysis Laboratory

摘　　要：在１．０ｍｏｌ／Ｌ甲酸－甲酸钠－０．０３ｍｏｌ／Ｌ邻苯二甲酸氢钾混合底液（ｐＨ３．５）中，锑－茜素络合剂（ＡＬＣ）络合物在单扫示波极谱上于－０．５３Ｖ（ｖｓ．ＳＣＥ）产生一极谱波。加入１．６×１０－３ｍｏｌ／ＬＣｕ（Ⅱ）后，灵敏度有较大提高，峰电流与锑浓度在２．０×１０－８～３．０×１０－６ｍｏｌ／Ｌ范围内呈线性关系，检测限达１．０×１０－８ｍｏｌ／Ｌ。研究了电极反应机理。方法应用于铜合金中锑的测定，结果满意。n a supporting electrolyte containing 1×10 -5 mol/L alizarin complexone,1mol/L HCOOH HCOONa,0.03mol/L potassium hydrogen phthalate,at pH3.5,a sensitive adsorptive complex wave of antimony alizarin complexone was obtained by using single sweep polarography.The peak potential was -0.53V ( vs .SCE).After adding copper(Ⅱ),it became more sensitive.The peak current was linearly related to the concentration of antimony(Ⅲ) in the range from 2.0×10 -8 to 3.0×10 -6 mol/L.The detection limit was 1×10 -8 mol/L.The reversibility and the mechanism of electrode reaction were investigated in detail.The method has been applied to the direct determination of antimony in copper alloys with satisfactory results.

关 键 词：锑 铜 茜素络合剂 极谱吸附波 测定 

分 类 号：O614.531[理学—无机化学]