稀土-溴邻苯三酚红的极谱研究及应用  

Study on the electrochemical of rare earth with bromopyrogal-red and its analytical application

作　　者：陈红[1] 朱亮[2] 康敬万[1] 莫尊理[1] 高锦章[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070 [2]兰州铁道学院附属中学,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2002年第1期48-50,共3页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目 (2 9875 0 18);甘肃省自然科学基金资助项目 (ZS 0 2 5 0 0 8 Z)

摘　　要：在pH =5 0 0的HAc NaAc介质中 ,溴邻苯三酚红 (简称BPR)在汞电极上产生 2个还原峰 ,峰电位分别为- 0 95V和 - 1 0 3V (vs SCE) .加入稀土离子时 ,2峰都降低 ,并且在 - 1 0 3V处的峰电流的降低与加入稀土离子的浓度在 9× 10 - 8～ 1× 10 - 5mol/L范围内呈线性关系 ,检测下限达到 5 8× 10 - 8mol/L .该波可成功地用于微量稀土的测定 .通过对电极反应机理的研究 ,可以确定该体系是一个反应物强吸附、配体In pH=5.00 HAc-NaAc supporting electrolyte,BPR has a well-shaped polarographic reduction wave at -1.03?V(vs.SCE)and a smaller reduction wave at -0.95 V.When the rare earth ions were added,both peak currents decrease and the peak potential shifted negatively a little.The behavior and mechanism of the wave has been studied.The peak current of the -1.03?V were proportional to the concentration of rare earth ions in the range of 9×10 -8 ～ 1×10 -5?mol/L,the detection limit was down to 5.8×10 -8?mol/L.

关 键 词：稀土 溴邻苯三酚红 极谱分析 电极反应机理 BPR 

分 类 号：O614.33[理学—无机化学] O657.14[理学—化学]