β-环糊精交联聚合物(β-CDP)包结吡啶偶氮-间苯二酚PAR修饰碳糊电极富集测定痕量钴  

The Inclusion Complex of β-Cyclodextrin Cross-linking Polymer with Pyridylazo-resorcinol Modified Carbon Paste Electrode for Trace Cobalt (Ⅱ) Determination

作　　者：刘海燕[1] 张国荣[1] 王艳玲[1] 

机构地区：[1]山东师范大学化学系,济南250014

出　　处：《化学传感器》2001年第4期31-37,共7页Chemical Sensors

摘　　要：本文报道β-CDP-PAR包结树脂修饰碳糊电极在0.1mol-L^(-1)NH_4Cl 缓冲液中,开路富集,与Co^(2+)生成电活性络合物,经介质交换,电位氧化,用微分脉冲阴极溶出伏安法测定,在-0.19V 产生一灵敏的阴极峰,在浓度为2.0×1^(-9)～1.0×10^(-5)mol·L^(-1)范围内与峰电流成良好的线性关系,检测限为1.0×10^(-5)mol·L～(-1)。此方法已用于水样中钴的测定,得到了满意的结果。A carbon paste electrode chemically modified with the inclusion complex of β-cy- clodextrin cross-linking polymer with pyridylazo-resorcinol preconcentrated cobalt ion in 0.1 mol·L^(-1)NH_4Cl buffer in an open circuit.This was followed by mediun exchange to a blank solution where the accumulated Co^(2+) was oxidized.Subsequently a differential pulse cathodic stripping voltammetry was used for determination of cobalt ion.There was a sensitive peak at the potential of -0.19V,the peak current is directly proportional to the concentration of Co^(2+) over the range 2.0×10^(-9)～1.0×10^(-5)mol·L^(-1).The detection limit is 1.0×10^(-9)mol·L^(-1).The developed method was applied to Cobalt (Ⅱ) in potabse water.

关 键 词：痕量钴 吡啶偶氮-间苯二酚 PAR β-环糊精 交联 聚合物 (β-CDP) 微分脉冲阴极溶出伏安法 水质监测 

分 类 号：O657.1[理学—分析化学]