Selective determination of dopamine in the presence of ascorbic acid at an over-oxidized poly(N-acetylaniline) electrode
An over-oxidized poly(N-acetylaniline) (PNAANI)/GCE was used to determine dopamine (DA) in a large excess of ascorbic acid (AA) by differential pulse voltammetry. A linear relation between Ip and DA concentration was found over the range 5.0 x 10(-7) to 2.0 x 10(-5) M. The detection limit was 1.68 x...
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| Veröffentlicht in: | Analyst (London) 2001-01, Vol.126 (6), p.736-738 |
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| container_title | Analyst (London) |
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| creator | Zheng, L Wu, S Lin, X Nie, L Rui, L |
| description | An over-oxidized poly(N-acetylaniline) (PNAANI)/GCE was used to determine dopamine (DA) in a large excess of ascorbic acid (AA) by differential pulse voltammetry. A linear relation between Ip and DA concentration was found over the range 5.0 x 10(-7) to 2.0 x 10(-5) M. The detection limit was 1.68 x 10(-8) M for S/N = 3 and 400 microM AA did not interfere with the DA determination. The high sensitivity was due to accumulation and selectivity was due to charge discrimination. The mechanism of selective determination of DA at over-oxidized PNAANI/GCE was also proposed. |
| doi_str_mv | 10.1039/b102534c |
| format | Article |
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A linear relation between Ip and DA concentration was found over the range 5.0 x 10(-7) to 2.0 x 10(-5) M. The detection limit was 1.68 x 10(-8) M for S/N = 3 and 400 microM AA did not interfere with the DA determination. The high sensitivity was due to accumulation and selectivity was due to charge discrimination. The mechanism of selective determination of DA at over-oxidized PNAANI/GCE was also proposed.</description><identifier>ISSN: 0003-2654</identifier><identifier>EISSN: 1364-5528</identifier><identifier>DOI: 10.1039/b102534c</identifier><identifier>PMID: 11445929</identifier><identifier>CODEN: ANALAO</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Analytical, structural and metabolic biochemistry ; Ascorbic Acid ; Biological and medical sciences ; Dopamine - analysis ; Electrochemistry ; Electrodes ; Fundamental and applied biological sciences. 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A linear relation between Ip and DA concentration was found over the range 5.0 x 10(-7) to 2.0 x 10(-5) M. The detection limit was 1.68 x 10(-8) M for S/N = 3 and 400 microM AA did not interfere with the DA determination. The high sensitivity was due to accumulation and selectivity was due to charge discrimination. The mechanism of selective determination of DA at over-oxidized PNAANI/GCE was also proposed.</description><subject>Analytical, structural and metabolic biochemistry</subject><subject>Ascorbic Acid</subject><subject>Biological and medical sciences</subject><subject>Dopamine - analysis</subject><subject>Electrochemistry</subject><subject>Electrodes</subject><subject>Fundamental and applied biological sciences. 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Psychology</topic><topic>Non peptidic neurotransmitters, polyamines</topic><topic>Other biological molecules</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zheng, L</creatorcontrib><creatorcontrib>Wu, S</creatorcontrib><creatorcontrib>Lin, X</creatorcontrib><creatorcontrib>Nie, L</creatorcontrib><creatorcontrib>Rui, L</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Analyst (London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zheng, L</au><au>Wu, S</au><au>Lin, X</au><au>Nie, L</au><au>Rui, L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Selective determination of dopamine in the presence of ascorbic acid at an over-oxidized poly(N-acetylaniline) electrode</atitle><jtitle>Analyst (London)</jtitle><addtitle>Analyst</addtitle><date>2001-01-01</date><risdate>2001</risdate><volume>126</volume><issue>6</issue><spage>736</spage><epage>738</epage><pages>736-738</pages><issn>0003-2654</issn><eissn>1364-5528</eissn><coden>ANALAO</coden><abstract>An over-oxidized poly(N-acetylaniline) (PNAANI)/GCE was used to determine dopamine (DA) in a large excess of ascorbic acid (AA) by differential pulse voltammetry. 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| ispartof | Analyst (London), 2001-01, Vol.126 (6), p.736-738 |
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| source | MEDLINE; Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Analytical, structural and metabolic biochemistry Ascorbic Acid Biological and medical sciences Dopamine - analysis Electrochemistry Electrodes Fundamental and applied biological sciences. Psychology Non peptidic neurotransmitters, polyamines Other biological molecules |
| title | Selective determination of dopamine in the presence of ascorbic acid at an over-oxidized poly(N-acetylaniline) electrode |
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