Interference of copper and nickel on electrochemical hydride generation

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DOIResolve DOI: http://doi.org/10.1039/JA9961100421
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TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
Volume11
Issue6
Pages421425; # of pages: 5
AbstractInterferences by copper and nickel on electrochemical hydride generation of stibine, arsine and hydrogen selenide were examined using flow injection sample introduction. Direct interference or memory interference by either metal was found to be severe when using lead, pyrolytic graphite or vitreous carbon as a cathode. With a lead cathode, corresponding signal recoveries (%) for AsH3, SbH3, and SeH2 were, 20, 20 and 60 in the presence of 20, 10 and 40 µg ml–1 of NiII, respectively, and 30 and 50 for AsH3, and SbH3 in the presence of 120 and 7.5 µg ml–1 of CuII, respectively. Although nickel presented less interference on arsine production with a platinum cathode [no interference from 600 µg ml–1 NiII], arsine production efficiency is too low to be analytically useful with this material (<8%). An increase in acidity of the catholyte solution and use of thiourea or L-cysteine resulted in no alleviation of interference from copper on stibine production [50% suppression due to 7.5 µg ml–1 CuII]. A discussion is presented outlining the potential remedial action which can be undertaken to minimize or eliminate such interferences.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedNo
Identifier10391186
NRC number1273
NPARC number8898181
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Record identifierb34c5664-5233-47db-8e42-fb3917783183
Record created2009-04-22
Record modified2016-05-09
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