KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION

Kinetics and stoichiometric measurements based on the reactions of stable free radicals are among the most employed procedures in the evaluation of antioxidant activities of pure compounds and complex mixtures. In the present work it is shown that initial rates of diphenyl-picryl hydrazyl (DPPH) con...

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Autores principales:	CAMPOS,ANA MARIA, DURAN,NICOLE, LOPEZ-ALARCÓN,CAMILO, LISSI,EDUARDO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2012
Materias:	Diphenyl-picryl hydrazyl cinnamic acids reactivity stoichiometry
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000400010
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spelling	oai:scielo:S0717-970720120004000102013-04-04KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTIONCAMPOS,ANA MARIADURAN,NICOLELOPEZ-ALARCÓN,CAMILOLISSI,EDUARDO Diphenyl-picryl hydrazyl cinnamic acids reactivity stoichiometry Kinetics and stoichiometric measurements based on the reactions of stable free radicals are among the most employed procedures in the evaluation of antioxidant activities of pure compounds and complex mixtures. In the present work it is shown that initial rates of diphenyl-picryl hydrazyl (DPPH) consumption elicited by cinnamic acid derivatives are closely related to their reactivity towards peroxyl radicals. This implies that kinetic data regarding DPPH bleaching can be useful on the evaluation of antioxidant reactivities. On the other hand, data obtained at a single (long) reaction time are unrelated to the reactivity of the antioxidants and mostly reflect the number of phenol groups present in the tested sample.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.57 n.4 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000400010en10.4067/S0717-97072012000400010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Diphenyl-picryl hydrazyl cinnamic acids reactivity stoichiometry
spellingShingle	Diphenyl-picryl hydrazyl cinnamic acids reactivity stoichiometry CAMPOS,ANA MARIA DURAN,NICOLE LOPEZ-ALARCÓN,CAMILO LISSI,EDUARDO KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
description	Kinetics and stoichiometric measurements based on the reactions of stable free radicals are among the most employed procedures in the evaluation of antioxidant activities of pure compounds and complex mixtures. In the present work it is shown that initial rates of diphenyl-picryl hydrazyl (DPPH) consumption elicited by cinnamic acid derivatives are closely related to their reactivity towards peroxyl radicals. This implies that kinetic data regarding DPPH bleaching can be useful on the evaluation of antioxidant reactivities. On the other hand, data obtained at a single (long) reaction time are unrelated to the reactivity of the antioxidants and mostly reflect the number of phenol groups present in the tested sample.
author	CAMPOS,ANA MARIA DURAN,NICOLE LOPEZ-ALARCÓN,CAMILO LISSI,EDUARDO
author_facet	CAMPOS,ANA MARIA DURAN,NICOLE LOPEZ-ALARCÓN,CAMILO LISSI,EDUARDO
author_sort	CAMPOS,ANA MARIA
title	KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
title_short	KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
title_full	KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
title_fullStr	KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
title_full_unstemmed	KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION
title_sort	kinetic and stoichiometric evaluation of free radicals scavengers activities based on diphenyl-picryl hydrazyyl (dpph) consumption
publisher	Sociedad Chilena de Química
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000400010
work_keys_str_mv	AT camposanamaria kineticandstoichiometricevaluationoffreeradicalsscavengersactivitiesbasedondiphenylpicrylhydrazyyldpphconsumption AT durannicole kineticandstoichiometricevaluationoffreeradicalsscavengersactivitiesbasedondiphenylpicrylhydrazyyldpphconsumption AT lopezalarconcamilo kineticandstoichiometricevaluationoffreeradicalsscavengersactivitiesbasedondiphenylpicrylhydrazyyldpphconsumption AT lissieduardo kineticandstoichiometricevaluationoffreeradicalsscavengersactivitiesbasedondiphenylpicrylhydrazyyldpphconsumption
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KINETIC AND STOICHIOMETRIC EVALUATION OF FREE RADICALS SCAVENGERS ACTIVITIES BASED ON DIPHENYL-PICRYL HYDRAZYYL (DPPH) CONSUMPTION

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