Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer

Autores
Lima, Marcelo B.; Andrade, Stéfani I. E.; Harding, David P.; Pistonesi, Marcelo Fabian; Fernández Band, Beatriz Susana; Araújo, Mário C.U.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Both turbidimetric and photometric determinations of total tannins in samples of green and black tea, using a micro-flow-batch analyzer (μFBA) were studied. The miniaturized system was formed using photocurable urethane-acrylate resin and ultraviolet lithography technique. The turbidimetric method was based on the precipitation reaction of Cu (II) with tannins in acetate medium at a pH of 4.5. The photometric method was based on the complexation reaction of tannins with ferrous tartrate. The turbidimetric μFBA was able to test 200 samples per hour. The photometric μFBA allowed 300 analyses per hour, generating 136 μL of residue per analysis. The paired t test, at a 95% confidence level, showed no statistically significant differences between results obtained by both methods and the reference method. The urethane-acrylate μFBA maintained satisfactory physical and chemical properties, and represents an improvement over conventional flow-batch analyzer.
Fil: Lima, Marcelo B.. Universidade Federal da Paraíba; Brasil
Fil: Andrade, Stéfani I. E.. Universidade Federal da Paraíba; Brasil
Fil: Harding, David P.. Universidade Federal da Paraíba; Brasil
Fil: Pistonesi, Marcelo Fabian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Araújo, Mário C.U.. Universidade Federal da Paraíba; Brasil
Materia
FLOW-BATCH SYSTEM
GREEN AND BLACK TEA
MICROFABRICATION
PHOTOMETRIC DETERMINATION
TANNINS
TURBIDIMETRIC DETERMINATION
URETHANE-ACRYLATE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/58632
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/58632
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzerLima, Marcelo B.Andrade, Stéfani I. E.Harding, David P.Pistonesi, Marcelo FabianFernández Band, Beatriz SusanaAraújo, Mário C.U.FLOW-BATCH SYSTEMGREEN AND BLACK TEAMICROFABRICATIONPHOTOMETRIC DETERMINATIONTANNINSTURBIDIMETRIC DETERMINATIONURETHANE-ACRYLATEhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Both turbidimetric and photometric determinations of total tannins in samples of green and black tea, using a micro-flow-batch analyzer (μFBA) were studied. The miniaturized system was formed using photocurable urethane-acrylate resin and ultraviolet lithography technique. The turbidimetric method was based on the precipitation reaction of Cu (II) with tannins in acetate medium at a pH of 4.5. The photometric method was based on the complexation reaction of tannins with ferrous tartrate. The turbidimetric μFBA was able to test 200 samples per hour. The photometric μFBA allowed 300 analyses per hour, generating 136 μL of residue per analysis. The paired t test, at a 95% confidence level, showed no statistically significant differences between results obtained by both methods and the reference method. The urethane-acrylate μFBA maintained satisfactory physical and chemical properties, and represents an improvement over conventional flow-batch analyzer.Fil: Lima, Marcelo B.. Universidade Federal da Paraíba; BrasilFil: Andrade, Stéfani I. E.. Universidade Federal da Paraíba; BrasilFil: Harding, David P.. Universidade Federal da Paraíba; BrasilFil: Pistonesi, Marcelo Fabian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Araújo, Mário C.U.. Universidade Federal da Paraíba; BrasilElsevier Science2012-01-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/58632Lima, Marcelo B.; Andrade, Stéfani I. E.; Harding, David P.; Pistonesi, Marcelo Fabian; Fernández Band, Beatriz Susana; et al.; Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer; Elsevier Science; Talanta; 88; 15-1-2012; 717-7230039-9140CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0039914011010587info:eu-repo/semantics/altIdentifier/doi/10.1016/j.talanta.2011.11.076info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:53:39Zoai:ri.conicet.gov.ar:11336/58632instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:53:39.769CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
title Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
spellingShingle Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
Lima, Marcelo B.
FLOW-BATCH SYSTEM
GREEN AND BLACK TEA
MICROFABRICATION
PHOTOMETRIC DETERMINATION
TANNINS
TURBIDIMETRIC DETERMINATION
URETHANE-ACRYLATE
title_short Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
title_full Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
title_fullStr Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
title_full_unstemmed Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
title_sort Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer
dc.creator.none.fl_str_mv Lima, Marcelo B.
Andrade, Stéfani I. E.
Harding, David P.
Pistonesi, Marcelo Fabian
Fernández Band, Beatriz Susana
Araújo, Mário C.U.
author Lima, Marcelo B.
author_facet Lima, Marcelo B.
Andrade, Stéfani I. E.
Harding, David P.
Pistonesi, Marcelo Fabian
Fernández Band, Beatriz Susana
Araújo, Mário C.U.
author_role author
author2 Andrade, Stéfani I. E.
Harding, David P.
Pistonesi, Marcelo Fabian
Fernández Band, Beatriz Susana
Araújo, Mário C.U.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv FLOW-BATCH SYSTEM
GREEN AND BLACK TEA
MICROFABRICATION
PHOTOMETRIC DETERMINATION
TANNINS
TURBIDIMETRIC DETERMINATION
URETHANE-ACRYLATE
topic FLOW-BATCH SYSTEM
GREEN AND BLACK TEA
MICROFABRICATION
PHOTOMETRIC DETERMINATION
TANNINS
TURBIDIMETRIC DETERMINATION
URETHANE-ACRYLATE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Both turbidimetric and photometric determinations of total tannins in samples of green and black tea, using a micro-flow-batch analyzer (μFBA) were studied. The miniaturized system was formed using photocurable urethane-acrylate resin and ultraviolet lithography technique. The turbidimetric method was based on the precipitation reaction of Cu (II) with tannins in acetate medium at a pH of 4.5. The photometric method was based on the complexation reaction of tannins with ferrous tartrate. The turbidimetric μFBA was able to test 200 samples per hour. The photometric μFBA allowed 300 analyses per hour, generating 136 μL of residue per analysis. The paired t test, at a 95% confidence level, showed no statistically significant differences between results obtained by both methods and the reference method. The urethane-acrylate μFBA maintained satisfactory physical and chemical properties, and represents an improvement over conventional flow-batch analyzer.
Fil: Lima, Marcelo B.. Universidade Federal da Paraíba; Brasil
Fil: Andrade, Stéfani I. E.. Universidade Federal da Paraíba; Brasil
Fil: Harding, David P.. Universidade Federal da Paraíba; Brasil
Fil: Pistonesi, Marcelo Fabian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Araújo, Mário C.U.. Universidade Federal da Paraíba; Brasil
description Both turbidimetric and photometric determinations of total tannins in samples of green and black tea, using a micro-flow-batch analyzer (μFBA) were studied. The miniaturized system was formed using photocurable urethane-acrylate resin and ultraviolet lithography technique. The turbidimetric method was based on the precipitation reaction of Cu (II) with tannins in acetate medium at a pH of 4.5. The photometric method was based on the complexation reaction of tannins with ferrous tartrate. The turbidimetric μFBA was able to test 200 samples per hour. The photometric μFBA allowed 300 analyses per hour, generating 136 μL of residue per analysis. The paired t test, at a 95% confidence level, showed no statistically significant differences between results obtained by both methods and the reference method. The urethane-acrylate μFBA maintained satisfactory physical and chemical properties, and represents an improvement over conventional flow-batch analyzer.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-15
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/58632
Lima, Marcelo B.; Andrade, Stéfani I. E.; Harding, David P.; Pistonesi, Marcelo Fabian; Fernández Band, Beatriz Susana; et al.; Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer; Elsevier Science; Talanta; 88; 15-1-2012; 717-723
0039-9140
CONICET Digital
CONICET
url http://hdl.handle.net/11336/58632
identifier_str_mv Lima, Marcelo B.; Andrade, Stéfani I. E.; Harding, David P.; Pistonesi, Marcelo Fabian; Fernández Band, Beatriz Susana; et al.; Turbidimetric and photometric determination of total tannins in tea using a micro-flow-batch analyzer; Elsevier Science; Talanta; 88; 15-1-2012; 717-723
0039-9140
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0039914011010587
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.talanta.2011.11.076
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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