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+ ...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.展开更多
文摘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.
