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Silver‐Selective Coated‐Wire Electrode Based on Resorc[4]arene Neutral Carrier
Author(s) -
Mazloum Mohammad,
Salavati Niassary M.,
Mirhoseini Chahooki S. H.,
Amini Mohammad K.
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200203)14:5<376::aid-elan376>3.0.co;2-m
Subject(s) - electrode , materials science , optoelectronics , inorganic chemistry , chemistry
A coated‐wire ion‐selective poly(vinyl chloride) membrane electrode based on 2,c‐8,c‐14,c‐20‐tetrabutyl‐4,6,10,12,16,18,22,24‐octaacetyl‐resorc[4]arene, as a neutral carrier, was successfully developed for detection of Ag(I) in aqueous solution. The electrode exhibited linear response with Nernstian slope of 58±1 mV per decade within the concentration range 1×10 −5 −0.1 M silver ion. The limit of detection as determined from the intersection of the extrapolated linear segments of the calibration plot, was 3×10 −6 M. The electrode exhibited good selectivities for Ag(I) with respect to alkali, alkaline earth and several heavy metal ions. The response time of the electrode was <20 s over the entire concentration range. The coated‐wire electrodes could be used for at least two months without a considerable divergence in their potential. The electrode is suitable for use in aqueous solutions in a wide pH range of 1.5–6.0. It was used as an indicator electrode in titration of Ag(I) with sodium chloride solution.