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Analytical Letters Volume 34, 2001 - Issue 5
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Original Articles

ANODIC STRIPPING VOLTAMMETRIC DETERMINATION OF SILVER(I) AT A CARBON PASTE ELECTRODE MODIFIED WITH S2O2-DONOR PODAND

Kwang Soo Ha Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Chinju, 660-701, South Korea
,
Joong Hyun Kim Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Chinju, 660-701, South Korea
,
Youn Shick Ha Department of Health Administration, Chinju Health College, Chinju, 660-757, South Korea
,
Shim Sung Lee Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Chinju, 660-701, South KoreaCorrespondence[email protected]
&
Moo Lyong Seo Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Chinju, 660-701, South Korea
Pages 675-686 | Received 23 Oct 2000, Accepted 03 Jan 2001, Published online: 02 Feb 2007
 
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Abstract

Chemically modified electrodes for Ag(I) ion determination were constructed by incorporating S2O2-donor podand, L1 with a carbon paste mixture composed of graphite powder. Ag(I) ion was chemically deposited onto the surface of the modified electrode and then reduced at -0.4 V vs. Ag/AgCl. Well-defined stripping voltammetric peak was obtained by scanning the potential to the positive direction. By differential pulse stripping voltammetry, the appropriate calibration graph for Ag(I) was obtained between 5.0 × 10-7 M and 1.5 × 10-6 M and detection limit was 2.0 × 10-7 M. The ionic species such as Cd(II), Cu(II), Zn(II), Hg(II), EDTA, and oxalate(II) did not influence the determination of Ag(I) ion, except Pb(II).

ACKNOWLEDGMENTS

The support of the Korea Research Foundation (Project No. 99-005-D00004) is gratefully acknowledged.

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