分子筛修饰电极的研究(Ⅱ)──NaY-聚乙烯醇电极对铅离子的响应  

Studies on Zeolite Modified Electrode (Ⅱ)──Stripping Voltammograms of Ph^(2+) on Zeolite-Polyvinyl Electrode

作　　者：邹明珠[1] 鲁洁 茹钦华[2] 

机构地区：[1]吉林大学化学系,长春130023 [2]东北师范大学化学系,长春130024

出　　处：《高等学校化学学报》1997年第10期1618-1620,共3页Chemical Journal of Chinese Universities

基　　金：中国科学院长春应用化学研究所电分析化学开放实验室基金

摘　　要：A new zeolite modified electrode was prepared by using zeolite/polyvinyl as amodifier on GCE. The anodic stripping voltammograms of Ph2+ on ZPE is caused by zeoliteselective adsorption to Pb. The linear range of Ph2+ in 0. 5 mol/L KCl(pH=2. 0) solution is1. 0 × 10-6～ 1. 0 × 10-3 mol/L with 0. 999 correlation coefficient (n ＝ 6). The relativestandard deviation of the response to 4. 0 × 10-6 mol/L Pb2+ on ZPE which has been repeatedlyproduced for ten times is 2. 5 %. The detection limit is 3. 0× 10-7 mol/L Pb2+. To the 1. 0×10-6 mol/L Ph2+, 1 000 times A13+, Na+, K+, CI-, SO, NO3-, Hg2+, 100 times Ni2+,Co2+, Cu2+, Zn2+, Cd2+, Mn2+ and 10 times Ca2+, Fe3+, Mo6+, Cr3+ do not disturb theanalysis. The ZPE shows a high selectivity, sensitivity and a desired reproducibility. Itssensitivity dropped to 90% of the original value after it had been continuously used for thousandtimes.A new zeolite modified electrode was prepared by using zeolite/polyvinyl as amodifier on GCE. The anodic stripping voltammograms of Ph2+ on ZPE is caused by zeoliteselective adsorption to Pb. The linear range of Ph2+ in 0. 5 mol/L KCl(pH=2. 0) solution is1. 0 × 10-6～ 1. 0 × 10-3 mol/L with 0. 999 correlation coefficient (n ＝ 6). The relativestandard deviation of the response to 4. 0 × 10-6 mol/L Pb2+ on ZPE which has been repeatedlyproduced for ten times is 2. 5 %. The detection limit is 3. 0× 10-7 mol/L Pb2+. To the 1. 0×10-6 mol/L Ph2+, 1 000 times A13+, Na+, K+, CI-, SO, NO3-, Hg2+, 100 times Ni2+,Co2+, Cu2+, Zn2+, Cd2+, Mn2+ and 10 times Ca2+, Fe3+, Mo6+, Cr3+ do not disturb theanalysis. The ZPE shows a high selectivity, sensitivity and a desired reproducibility. Itssensitivity dropped to 90% of the original value after it had been continuously used for thousandtimes.

关 键 词：分子筛 聚乙烯醇 铅离子 修饰电极 NAY 

分 类 号：O657.15[理学—分析化学] O614.433[理学—化学]