Document Detail


Effect of interferents present in the internal solution or in the conducting polymer transducer on the responses of ion-selective electrodes.
MedLine Citation:
PMID:  16557407     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The effect of interferents present on the opposite side of the Pb2+-selective membrane has been studied for both internal solution and all-solid-state sensors with a conducting polymer (CP) transducer. For interferents with moderate selectivity coefficients (sodium cations) present in the internal solution or in the CP transducer phase, super-Nernstian responses were obtained. For sensors containing strongly discriminated interferents (lithium ions), however, responses typical of conventional electrodes are observed, despite the low activity of primary ions on the opposite side of the membrane. This effect is attributed to hindered incorporation of interfering ions into the membrane, which also impairs the long term stability of the potential. Because of the relatively small absolute amounts of interferents in the transducer of all-solid-state sensors, their exchange for primary ions occurs quickly. Thus, transformation of the sensor to one with a micromolar detection limit and high potential stability is observed.
Authors:
Agata Michalska; Marcin Ocypa; Krzysztof Maksymiuk
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Publication Detail:
Type:  Journal Article     Date:  2006-03-24
Journal Detail:
Title:  Analytical and bioanalytical chemistry     Volume:  385     ISSN:  1618-2642     ISO Abbreviation:  Anal Bioanal Chem     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-04-21     Completed Date:  2007-06-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101134327     Medline TA:  Anal Bioanal Chem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  203-7     Citation Subset:  -    
Affiliation:
Department of Chemistry, Warsaw University, Pasteura 1, 02-093 Warsaw, Poland. agatam@chem.uw.edu.pl
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