About: Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1135/cccc2010076
Description	Catecholamines (CAs) are important neurotransmitters and hormones in mammalian species. They are highly reactive and are readily oxidized to aminochromes. That enables the use of electrochemical method for their determination. In this paper, differential pulse voltammetric (DPV) determination and HPLC with amperometric detection of dopamine (D), epinephrine (E), norepinephrine (NE) and L-Dopa (DOPA) is developed and optimized. The carbon paste electrode (CPE) prepared of carbon powder CR2 and single-wall carbon nanotubes (SWCNT) (50:50 m/m) was used. The miniaturized body for CPE was used to reduce consumption of all chemicals. In Britton-Robinson buffer solution pH 6, the limits of detection 1 x 10(-6), 2 x 10(-6), 2 x 10(-6) and 8 x 10(-6) mol dm(-3) have been found for DPV determination of D, E, NE and DOPA, respectively. HPLC was carried out using 0.1 M phosphate buffer pH 3: methanol (95: 5) mobile phase containing 10 mM EDTA. The above described CPE in a wall-jet arrangement was used for amperometric detection. The limit of detection of each analyte in a mixture was 2 x 10(-6) mol dm(-3). Practical application of this method on spiked urine samples was verified. Catecholamines (CAs) are important neurotransmitters and hormones in mammalian species. They are highly reactive and are readily oxidized to aminochromes. That enables the use of electrochemical method for their determination. In this paper, differential pulse voltammetric (DPV) determination and HPLC with amperometric detection of dopamine (D), epinephrine (E), norepinephrine (NE) and L-Dopa (DOPA) is developed and optimized. The carbon paste electrode (CPE) prepared of carbon powder CR2 and single-wall carbon nanotubes (SWCNT) (50:50 m/m) was used. The miniaturized body for CPE was used to reduce consumption of all chemicals. In Britton-Robinson buffer solution pH 6, the limits of detection 1 x 10(-6), 2 x 10(-6), 2 x 10(-6) and 8 x 10(-6) mol dm(-3) have been found for DPV determination of D, E, NE and DOPA, respectively. HPLC was carried out using 0.1 M phosphate buffer pH 3: methanol (95: 5) mobile phase containing 10 mM EDTA. The above described CPE in a wall-jet arrangement was used for amperometric detection. The limit of detection of each analyte in a mixture was 2 x 10(-6) mol dm(-3). Practical application of this method on spiked urine samples was verified. (en)
Title	Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode (en)
skos:prefLabel	Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode (en)
skos:notation	RIV/00216208:11310/10:10111330!RIV12-MSM-11310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LC06035), Z(MSM0021620857)
http://linked.open...iv/cisloPeriodika	12
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Jemelková, Zuzana Zima, Jiří Barek, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	256688
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/10:10111330
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HPLC; Voltammetry; Electrochemistry; HPLC-ED; voltammetry; Differential pulse; Catecholamines; Carbon nanotubes; Carbon paste electrode (en)
http://linked.open.../riv/klicoveSlovo	Electrochemistry Catecholamines Differential pulse HPLC-ED Carbon paste electrode HPLC voltammetry Carbon nanotubes Voltammetry
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[BE681E219B5C]
http://linked.open...i/riv/nazevZdroje	Collection of Czechoslovak Chemical Communications
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Centre of Biophysical Chemistry, Bioelectrochemistry and Bioanalysis. New Tools for Genomics, Proteomics and Biomedicine.
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	75
http://linked.open...iv/tvurceVysledku	Barek, Jiří Zima, Jiří Jemelková, Zuzana
http://linked.open...ain/vavai/riv/wos	000285770100001
http://linked.open...n/vavai/riv/zamer	Nové molekulární systémy pro pokročilé aplikace prospěšné pro zdraví a šetrné k životnímu prostředí
issn	0010-0765
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1135/cccc2010076
http://localhost/t...ganizacniJednotka	11310
is http://linked.open...avai/riv/vysledek of	Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode Electroanalysis of some catecholamines at a single-wall nanotubes modified carbon paste electrode

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