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Direct detection of...
Direct detection of ammonium ion by means of oxygen electrocatalysis at a copper-polyaniline composite on a screen-printed electrode
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- Zhybak, Mykhailo T. (författare)
- Linköpings universitet,Tekniska fakulteten,Institutionen för fysik, kemi och biologi,Institute of Molecular Biology and Genetics, NAS of Ukraine, Kyiv, 03680, Ukraine
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- Vagin, Mikhail Yu. (författare)
- Linköpings universitet,Fysik och elektroteknik,Institutionen för fysik, kemi och biologi,Tekniska fakulteten
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- Beni, Valerio, 1972- (författare)
- RISE,Acreo,ACREO Swedish ICT, -601 74, Norrköping, SE, Sweden
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- Liu, Xianjie (författare)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
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- Dempsey, Eithne (författare)
- Centre for Research in Electroanalytical Technologies, Department of Science, Institute of Technology Tallaght, Tallaght, Dublin, Ireland
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- Turner, Anthony P. F. (författare)
- Linköpings universitet,Biosensorer och bioelektronik,Tekniska fakulteten
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- Korpan, Yaroslav I. (författare)
- National Academy of Sciences of Ukraine, Ukraine,Institute of Molecular Biology and Genetics, NAS of Ukraine, Kyiv, 03680, Ukraine
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(creator_code:org_t)
- 2016-03-29
- 2016
- Engelska.
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Ingår i: Microchimica Acta. - : Springer Science and Business Media LLC. - 0026-3672 .- 1436-5073. ; 183:6, s. 1981-1987
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We describe a composite material for use in electrochemical oxygen reduction. A screen-printed electrode (SPE) was consecutively modified with electrodeposited copper, a Nafion membrane and electropolymerized polyaniline (PANi) to give an electrocatalytic composite of type PANi/Nafion/Cu2O/SPE that displays good electrical conductivity at neutral pH values. It is found that the presence of ammonia causes complex formation with Cu(I), and this causes electroreduction of oxygen to result in an increased cathodic current. The finding was applied to the quantification of ammonium ions in the 1 to 1000 μM concentration range by amperometry at −0.45 V (vs. Ag/AgCl). This Faradaic phenomenon offers the advantage of direct voltammetric detection, one of the lowest known limits of detection (0.5 μM), and high sensitivity (250 mA∙M−1∙cm−2). It was applied to the determination of ammonium ion in human serum where it compared well with the photometric routine approach for clinical analysis using glutamate dehydrogenase. [Figure not available: see fulltext.]
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Andra medicinska och farmaceutiska grundvetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Other Basic Medicine (hsv//eng)
Nyckelord
- Amperometry
- Conductive polymer
- EDX
- Electrochemical impedance spectroscopy
- Nanocomposite
- SEM
- Serum analysis
- XPS
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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