Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli

The inactivation kinetics of Escherichia coli ATCC 35218 in hydrogen peroxide solutions at different concentrations (0-3.00% w/v) and pH values (3.0-7.2) at 25C was studied. Effectiveness of H2O2 solutions against E. coli ATCC 35218 appeared to improve at both higher H 2O2 concentrations and more ac...

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Autores principales: Raffellini, S., Guerrero, S., Alzamora, S.M.
Formato: JOUR
Materias:
Escherichia coli
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01496085_v28_n4_p514_Raffellini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01496085_v28_n4_p514_Raffellini
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spelling todo:paper_01496085_v28_n4_p514_Raffellini2023-10-03T15:01:06Z Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli Raffellini, S. Guerrero, S. Alzamora, S.M. Escherichia coli The inactivation kinetics of Escherichia coli ATCC 35218 in hydrogen peroxide solutions at different concentrations (0-3.00% w/v) and pH values (3.0-7.2) at 25C was studied. Effectiveness of H2O2 solutions against E. coli ATCC 35218 appeared to improve at both higher H 2O2 concentrations and more acidic pH values. As the H2O2 level was lowered, the influence of the pH of the solution on the rate of E. coli destruction was more notorious. Most of the inactivation semilogarithmic curves were not linear. Inactivation kinetics was modeled by using a Weibull type distribution of resistances. Quadratic polynomial models were applied to express the effects of H2O 2 concentration and pH on the exposure time needed to reduce the microbial population by 5 log. © 2008, The Author(s). Fil:Raffellini, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Guerrero, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alzamora, S.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01496085_v28_n4_p514_Raffellini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Escherichia coli
spellingShingle Escherichia coli
Raffellini, S.
Guerrero, S.
Alzamora, S.M.
Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
topic_facet Escherichia coli
description The inactivation kinetics of Escherichia coli ATCC 35218 in hydrogen peroxide solutions at different concentrations (0-3.00% w/v) and pH values (3.0-7.2) at 25C was studied. Effectiveness of H2O2 solutions against E. coli ATCC 35218 appeared to improve at both higher H 2O2 concentrations and more acidic pH values. As the H2O2 level was lowered, the influence of the pH of the solution on the rate of E. coli destruction was more notorious. Most of the inactivation semilogarithmic curves were not linear. Inactivation kinetics was modeled by using a Weibull type distribution of resistances. Quadratic polynomial models were applied to express the effects of H2O 2 concentration and pH on the exposure time needed to reduce the microbial population by 5 log. © 2008, The Author(s).
format JOUR
author Raffellini, S.
Guerrero, S.
Alzamora, S.M.
author_facet Raffellini, S.
Guerrero, S.
Alzamora, S.M.
author_sort Raffellini, S.
title Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
title_short Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
title_full Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
title_fullStr Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
title_full_unstemmed Effect of hydrogen peroxide concentration and pH on inactivation kinetics of Escherichia coli
title_sort effect of hydrogen peroxide concentration and ph on inactivation kinetics of escherichia coli
url http://hdl.handle.net/20.500.12110/paper_01496085_v28_n4_p514_Raffellini
work_keys_str_mv AT raffellinis effectofhydrogenperoxideconcentrationandphoninactivationkineticsofescherichiacoli
AT guerreros effectofhydrogenperoxideconcentrationandphoninactivationkineticsofescherichiacoli
AT alzamorasm effectofhydrogenperoxideconcentrationandphoninactivationkineticsofescherichiacoli
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