Perchlorate selective membrane electrodes based on synthesized platinum(II) complexes for low-level concentration measurements

Three synthesized platinum(II) complexes, [PtR 2(NN)] (R = Me, p-MeC 6H 4 and p-MeOC 6H 4; NN = 2,2′-bipyridyl), were studied to characterize their ability as an anion carrier in a PVC membrane electrode. The polymeric membrane electrodes (PME) and also coated glassy carbon electrodes (CGCE) prepare...

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Bibliographic Details
Published in:	Sensors and actuators. B, Chemical Vol. 120; no. 2; pp. 447 - 454
Main Authors:	Soleymanpour, A., Hamidi Asl, E., Nabavizadeh, S.M.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 10-01-2007
Subjects:	Actuators Anions Electrodes Membranes Perchlorate ion selective electrode Perchlorates Platinum complex Potentiometry PVC membrane electrode Sensors Urine PVC membrane electrode Perchlorate ion selective electrode Potentiometry Platinum complex
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Summary:	Three synthesized platinum(II) complexes, [PtR 2(NN)] (R = Me, p-MeC 6H 4 and p-MeOC 6H 4; NN = 2,2′-bipyridyl), were studied to characterize their ability as an anion carrier in a PVC membrane electrode. The polymeric membrane electrodes (PME) and also coated glassy carbon electrodes (CGCE) prepared with [Pt( p-MeOC 6H 4) 2(NN)] showed excellent response characteristics to perchlorate ions. The electrodes exhibited Nernstian responses to ClO 4 − ions over a wide concentration range from 5 × 10 −7 to 4.0 × 10 −1 M for PME and 1.5 × 10 −7 to 2.7 × 10 −1 M for CGCE with low detection limits (4.0 × 10 −7 M for PME and 1.0 × 10 −7 M for CGCE). The electrodes possess fast response time, satisfactory reproducibility, appropriate lifetime and, most importantly, good selectivity toward ClO 4 − relative to a variety of other common anions. The potentiometric response of the electrodes is independent of the pH of the test solution in the pH range 2.5–9.5. The proposed sensors were used in potentiometric determination of perchlorate ions in mineral water, urine samples and also samples containing interfering anions. The interaction of the ionophore with perchlorate ions was shown by UV–vis spectroscopy.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0925-4005 1873-3077
DOI:	10.1016/j.snb.2006.02.036