钼(Ⅵ)-7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠络合吸附波研究及应用  

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

作　　者：卢燕[1] 付佩玉[1] 周长利[1] 宋春红 李秀玲[2] 

机构地区：[1]山东建材工业学院应用化学系,济南250022 [2]浙江大学化学系,杭州310029

出　　处：《分析化学》1999年第11期1296-1299,共4页Chinese Journal of Analytical Chemistry

摘　　要：在pH4.8的0.013mol/L的HAc-NaAc介质中,钥(Ⅵ)-7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠体系在滴汞电极上,于-0.46V(vs.SCE)电位处得到良好的吸附还原波,其二阶导数峰电流I_p与Mo(Ⅵ)在2.5×10^(-8)～4.5×10^(-7)mol/L浓度范围内呈良好的线性关系,检测限为1.25×10^(-8)mol/L Mo(Ⅵ),方法用于钢样中微量钼的测定,结果较好.对电极机理进行了研究.Molybdenum-sodium-7-(1-benzeneazo)-8-hydroxyquinoline-5-sulfonate (BQ) complex pro- duces a reduction peak at-0.455 V( vs. SCE) on a dropping mercury electrode in 0.013 mol/L HAc-NaAc solution (pH = 4.8) . Under optimum conditions, the linear range of the concentration of Mo(Ⅵ)with the single-sweep second order derivative oscillopolarographic current was 2.5×10-8～4.5×10-7mol/L, the detection limit of Mo(VI) was 1.25×10-8 mol/L. This method has been applied to the determination of molybdenum in steel samples with satisfactory results. The mechanism of the electrode process has been studied.

关 键 词：钼 苯偶氮 羟基喹啉 磺酸钠 配合吸附波 测定 

分 类 号：O614.612[理学—无机化学]