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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 was caused by zeoliteselective adsorption to Pb. The linear range of Ph2 + in0.5 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 relative standard deviation of the response to 4. 0 × 10-6 mol / L Pb2 + on ZPE which has been repeatedproduced 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 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. , sensitivity and a desired reproducibility. Its sensitivity has been reduced to 90% of the original value after it had been continuously used for thousandtimes.