M. Shamsipur, S. Kazemi
Dec 1, 2000
Citations
0
Influential Citations
34
Citations
Journal
Electroanalysis
Abstract
A new PVC membrane sensor for nickel ions based on dibenzodiaza-15-crown-4 as membrane carrier was prepared. The electrode exhibits a Nernstian response for Ni2+ ions over a concentration range 7.1×10–7–1.2×10–2 M and a limit of detection of 5.6×10–7 M (0.03 ppm). It has a response time of about 20 s and can be used for at least two months without any divergence in potential. The proposed sensor revealed good selectivities for Ni2+ over a wide variety of other metal ions and can be used in the pH range of 3.0–6.0. It was used for direct determination of Ni2+ in solution and, as an indicator electrode, in potentiometric titration of nickel ions.