Perchlorate Selective Membrane Electrode Based on Surfactant-Modified Zeolite Y Nanocluster

Surfactant modified zeolite Y nano cluster was used to characterize its ability as an anion carrier in a PVC membrane electrode. The electrode showed excellent response characteristics to perchlorate anion. The electrode exhibited Nernstian response to ClO4 − anion over a wide concentration range covering the range 1.2×10-6 to 1.5×10-1 M with low detection limit 5.7×10−7 M and a slope of 59.6±0.8 mV per decade of perchlorate concentration. The electrode possess fast response time, reasonable reproducibility, appropriate lifetime and, most importantly, good selectivity toward ClO4 − relative to a variety of other common anions. The electrode response to perchlorate remained constant in the temperature range of 20-45 oC and in the presence of 1.0×10-4–3.2×10-3 M NaNO3. The potentiometric response of the electrodes is independent of the pH of test solution in the pH range of 2.1–10.8. The proposed sensors were used in potentiometric determination of perchlorate ions in river and tap waters.