Studies on Zeolite Modified Electrode (Ⅱ)──Stripping Voltammograms of Ph2+ on Zeolite-Polyvinyl Electrode

Abstract

Abstract: Anew zeolite modified electrode was prepared by using zeolite/polyvinyl as amodifier on GCE. The anodic stripping voltammograms of Pb²⁺ on ZPEis caused by zeoliteselective adsorption to Pb. The linear range of Pb²⁺ in 0.5 mol/L KCl(pH=2.0) solution is1. 0 × 10^-6～1. 0 × 10^-3 mol/Lwith 0. 999 correlation coefficient (n=6). The relativestandard deviation of the response to 4. 0 × 10^-6 mol/L Pb²⁺ on ZPEwhich 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⁺, 1000 times Al³⁺, Na⁺, K⁺, Cl^-, SO, NO_3-, Hg²⁺, 100 times Ni²⁺,Co²⁺, Cu²⁺, Zn²⁺, Cd²⁺, Mn²⁺ and 10 times Ca²⁺, Fe³⁺, Mo⁶⁺, Cr³⁺ do not disturb theanalysis. The ZPEshows a high selectivity, sensitivity and a desired reproducibility. Itssensitivity dropped to 90% of the original value after it had been continuously used for thousandtimes.

Key words: Zeolite, Polyvinyl, Lead ion, Modified electrode

CLC Number:

O657.15

TrendMD:

ZOU Ming-Zhu, LU Jie, RU Qin-Hua. Studies on Zeolite Modified Electrode (Ⅱ)──Stripping Voltammograms of Ph²⁺ on Zeolite-Polyvinyl Electrode[J]. Chem. J. Chinese Universities, 1997, 18(10): 1618.

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Studies on Zeolite Modified Electrode (Ⅱ)──Stripping Voltammograms of Ph²⁺ on Zeolite-Polyvinyl Electrode

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