EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION

The exact knowledge of the value of the extinction coefficient of the ABTS derived radical is necessary for its quantitative use in the evaluation of the antioxidant capacity of pure compounds and/or complex mixtures. We have performed experiments in order to stablish its lower and upper limits of i...

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Autores principales:	Henriquez,Carola, Lissi,Eduardo
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2002
Materias:	ABTS extintion coefficient antioxidants evaluation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400029
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spelling	oai:scielo:S0366-164420020004000292009-12-18EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATIONHenriquez,CarolaLissi,Eduardo ABTS extintion coefficient antioxidants evaluation The exact knowledge of the value of the extinction coefficient of the ABTS derived radical is necessary for its quantitative use in the evaluation of the antioxidant capacity of pure compounds and/or complex mixtures. We have performed experiments in order to stablish its lower and upper limits of its value. The limits obtained, 1.0 x 10(4) M-1 cm-1 <= epsilon 734 <= 1.6 x 10(4) M-1 cm-1 are fully compatible with previously reported data. However, the use of these values leads to large stoichiometric coefficients for the reaction of these radicals with simple substrates, such as monophenols or tryptophan.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaBoletín de la Sociedad Chilena de Química v.47 n.4 20022002-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400029en10.4067/S0366-16442002000400029
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ABTS extintion coefficient antioxidants evaluation
spellingShingle	ABTS extintion coefficient antioxidants evaluation Henriquez,Carola Lissi,Eduardo EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
description	The exact knowledge of the value of the extinction coefficient of the ABTS derived radical is necessary for its quantitative use in the evaluation of the antioxidant capacity of pure compounds and/or complex mixtures. We have performed experiments in order to stablish its lower and upper limits of its value. The limits obtained, 1.0 x 10(4) M-1 cm-1 <= epsilon 734 <= 1.6 x 10(4) M-1 cm-1 are fully compatible with previously reported data. However, the use of these values leads to large stoichiometric coefficients for the reaction of these radicals with simple substrates, such as monophenols or tryptophan.
author	Henriquez,Carola Lissi,Eduardo
author_facet	Henriquez,Carola Lissi,Eduardo
author_sort	Henriquez,Carola
title	EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
title_short	EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
title_full	EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
title_fullStr	EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
title_full_unstemmed	EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION
title_sort	evaluation of the extinction coefficient of the abts derived radical cation
publisher	Sociedad Chilena de Química
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400029
work_keys_str_mv	AT henriquezcarola evaluationoftheextinctioncoefficientoftheabtsderivedradicalcation AT lissieduardo evaluationoftheextinctioncoefficientoftheabtsderivedradicalcation
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EVALUATION OF THE EXTINCTION COEFFICIENT OF THE ABTS DERIVED RADICAL CATION

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