Document Detail


Charge-transfer triiodide ion-selective electrode based on 7,16-dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane.
MedLine Citation:
PMID:  15790116     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
A new PVC membrane electrode for the triiodide ion based on a charge-transfer complex of iodine with 7,16-dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane as a membrane carrier was prepared. The electrode exhibits a Nernstian response for triiodide ions over a wide concentration range (1.0 x 10(-1)-1.0 x 10(-5) M) with a slope of 59.3 +/- 0.9 mV decade(-1) and a detection limit of 6.3 x 10(-6) M. It has a response time of 30 s and can be used for at least 3 months without any divergence in the potential. The potentiometric response is independent of the pH, in the pH range 1.6 - 10.0. The proposed electrode has shown very high selectivity for the triiodide ion over a wide variety of other anions. This electrode was successfully applied as an indicator electrode in the potentiometric titration of ascorbic acid and hydroquinone from pharmaceutical preparations as well as ascorbic acid in orange juice and dissolved O2 in tap water.
Authors:
Golamreza Khayatian; Hadi Rezatabar; Abdollah Salimi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Analytical sciences : the international journal of the Japan Society for Analytical Chemistry     Volume:  21     ISSN:  0910-6340     ISO Abbreviation:  Anal Sci     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-25     Completed Date:  2006-05-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8511078     Medline TA:  Anal Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  297-302     Citation Subset:  -    
Affiliation:
Department of Chemistry, Kurdistan University, Sanandaj, Iran. gkhayatian@yahoo.com
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