Authors
Mehran Javanbakht, Mohammad Reza Ganjali, Parviz Norouzi, Alireza Badiei, Abed Hasheminasab, Majid Abdouss
Publication date
2007/6
Journal
Electroanalysis: An International Journal Devoted to Fundamental and Practical Aspects of Electroanalysis
Volume
19
Issue
12
Pages
1307-1314
Publisher
WILEY‐VCH Verlag
Description
A new dipyridyl‐functionalized silica gel (DPSG) was synthesized. The potentiometric response of silver ion was investigated at a carbon paste electrode chemically modified with functionalized nanoporous silica gel. The electrodes with a DPSG proportions of 10.1% (w/w), showed very stable potential. Calibration plots with Nernstian slopes for Ag+ were observed, 58.7 (±0.9) mV decade−1, over a wide linear range of concentration (5.0×10−7 to 1.0×10−1 M). The electrode has a detection limit of 1.0×10−7 M. The selectivity coefficients measured by the match potential method in acetate buffer, pH 5.5, were investigated. The electrode has fast response time, high performance, high sensitivity in wide cation activity ranges, and good long term stability (more than 6 months). The method was satisfactory and used to determine the concentration of silver ion in waste waters contaminated by this metal.
Total citations
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Scholar articles
M Javanbakht, MR Ganjali, P Norouzi, A Badiei… - Electroanalysis: An International Journal Devoted to …, 2007