配位吸附波同时测定PbA和InA  

Polargraphic Adsorption Wave of Lead, Indium-Dibromo-o-Benzenediamine-Diacetamide Ester Complex and Simultaneous Determination of Pb?Ⅱand InⅢ

作　　者：周长利[1] 罗川南[1] 张霞[1] 赵迪思[1] 孙长春[1] 

机构地区：[1]济南大学应用化学系,济南250022

出　　处：《分析化学》2004年第10期1359-1361,共3页Chinese Journal of Analytical Chemistry

摘　　要：在 0 .0 5mol/L氯乙酸 氯乙酸钠 (pH 3.0 )介质中 ,Pb2 + 、In3 + 与二溴邻苯二胺双草酰胺酸酯 (DBAC)生成络合物 ,并吸附于电极表面 ,分别于 - 0 .5 0V、- 0 .6 3V(vs .SCE)得到络合物吸附还原波。其二阶导数峰电流与Pb2 + 、In3 + 浓度分别在 2 .5× 10 -8～ 6 .0× 10 -6mol/L、7.5× 10 -8～ 3.4× 10 -6mol/L内呈良好的线性关系 ;检出限分别为 1.5× 10 -8mol/LPb2 + 和 4 .5× 10 -8mol/LIn3 + 。应用于陶瓷颜料、矿石中微量Pb、In的测定 ,结果满意。In a buffer solution of 0.05 mol/L ClCH_2COOH-ClCH_2COONa(pH 3.0), the complex of Lead  and Indium -dibromo-o-benzenediamine-diacetamide ester (DBAC) was adsorbed on the surface of mercury electrode and produced a reduction peak at -0.50V, -0.63 V (vs. SCE), respectively. The detection limit and the linear range of the concentration of Pb 2+, In 3+ to the single-sweep 2th-order derivative osilloplarographic peak current(I″_p) were 1.5×10 -8 mol/L Pb 2+, 4.5×10 -8 mol/L In 3+ and 2.5×10 -8～6.0×10 -6 mol/L Pd 2+, 7.5×10 -8～3.4×10 -6 mol/L In 3+, respectively.The method has been applied to the determination of trace In 3+ in dyestuff and ore samples with satisfactory results.

关 键 词：配位吸附波 同时测定 铅 铟 二溴邻苯二胺双草酰胺酸酯 环境污染物质 

分 类 号：O657.14[理学—分析化学]