Chitosan as flocculant agent for clarification of stevia extract
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | http://repositorio.unifesp.br/handle/11600/6886 http://dx.doi.org/10.1590/S0104-14282012005000066 |
Resumo: | Stevia is used as a sweetener due to its low calorific value and its taste, which is very similar to that of sucrose. After extraction from dried leaves, stevia extract is dark in colour, and therefore needs to be whitened to increase acceptance by consumers. In this study we tested chitosan, a cationic polyelectrolyte, as flocculant agent for the whitening of the Stevia extract. Positive charges of chitosan can interact electrostatically with a counter-ion, sodium tripolyphosphate (TPP), and then chitosan precipitates. A factorial design was used to study the whitening process, in which Glycosides Removal, Colour Removal, Turbidity Removal and Soluble Solids Removal were evaluated. The studied factors were Chitosan Mass and pH of the TPP solution. The results showed that chitosan is a good flocculant agent, being able to flocculate both the glycosides and the pigments that make the extract coloured. |
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Oliveira, Silvia P. D. deMahl, Cynthia Regina AlbrechtSimões, Márcia R.Silva, Classius Ferreira da [UNIFESP]UNIOESTE Centro de Engenharias e Ciências ExatasUniversidade Federal de São Paulo (UNIFESP)2015-06-14T13:43:31Z2015-06-14T13:43:31Z2012-01-01Polímeros. Associação Brasileira de Polímeros, v. 22, n. 4, p. 401-406, 2012.0104-1428http://repositorio.unifesp.br/handle/11600/6886http://dx.doi.org/10.1590/S0104-14282012005000066S0104-14282012000400016.pdfS0104-1428201200040001610.1590/S0104-14282012005000066WOS:000313083600016Stevia is used as a sweetener due to its low calorific value and its taste, which is very similar to that of sucrose. After extraction from dried leaves, stevia extract is dark in colour, and therefore needs to be whitened to increase acceptance by consumers. In this study we tested chitosan, a cationic polyelectrolyte, as flocculant agent for the whitening of the Stevia extract. Positive charges of chitosan can interact electrostatically with a counter-ion, sodium tripolyphosphate (TPP), and then chitosan precipitates. A factorial design was used to study the whitening process, in which Glycosides Removal, Colour Removal, Turbidity Removal and Soluble Solids Removal were evaluated. The studied factors were Chitosan Mass and pH of the TPP solution. The results showed that chitosan is a good flocculant agent, being able to flocculate both the glycosides and the pigments that make the extract coloured.UNIOESTE Centro de Engenharias e Ciências ExatasUNIFESP Centro de Ciências Exatas e da TerraUNIFESP, Centro de Ciências Exatas e da TerraSciELO401-406engAssociação Brasileira de PolímerosPolímerosSteviasweetenerschitosanflocculationclarificationChitosan as flocculant agent for clarification of stevia extractinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALS0104-14282012000400016.pdfapplication/pdf748162${dspace.ui.url}/bitstream/11600/6886/1/S0104-14282012000400016.pdfe0fcc4118267d2183f8e93433fe66776MD51open accessTEXTS0104-14282012000400016.pdf.txtS0104-14282012000400016.pdf.txtExtracted texttext/plain26516${dspace.ui.url}/bitstream/11600/6886/9/S0104-14282012000400016.pdf.txt8f59c63bfbdfb22479b64c84d443e303MD59open accessTHUMBNAILS0104-14282012000400016.pdf.jpgS0104-14282012000400016.pdf.jpgIM Thumbnailimage/jpeg8270${dspace.ui.url}/bitstream/11600/6886/11/S0104-14282012000400016.pdf.jpg0b51788921998f98be74ea1be52c019dMD511open access11600/68862023-06-05 19:33:16.495open accessoai:repositorio.unifesp.br:11600/6886Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:33:16Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Chitosan as flocculant agent for clarification of stevia extract |
title |
Chitosan as flocculant agent for clarification of stevia extract |
spellingShingle |
Chitosan as flocculant agent for clarification of stevia extract Oliveira, Silvia P. D. de Stevia sweeteners chitosan flocculation clarification |
title_short |
Chitosan as flocculant agent for clarification of stevia extract |
title_full |
Chitosan as flocculant agent for clarification of stevia extract |
title_fullStr |
Chitosan as flocculant agent for clarification of stevia extract |
title_full_unstemmed |
Chitosan as flocculant agent for clarification of stevia extract |
title_sort |
Chitosan as flocculant agent for clarification of stevia extract |
author |
Oliveira, Silvia P. D. de |
author_facet |
Oliveira, Silvia P. D. de Mahl, Cynthia Regina Albrecht Simões, Márcia R. Silva, Classius Ferreira da [UNIFESP] |
author_role |
author |
author2 |
Mahl, Cynthia Regina Albrecht Simões, Márcia R. Silva, Classius Ferreira da [UNIFESP] |
author2_role |
author author author |
dc.contributor.institution.none.fl_str_mv |
UNIOESTE Centro de Engenharias e Ciências Exatas Universidade Federal de São Paulo (UNIFESP) |
dc.contributor.author.fl_str_mv |
Oliveira, Silvia P. D. de Mahl, Cynthia Regina Albrecht Simões, Márcia R. Silva, Classius Ferreira da [UNIFESP] |
dc.subject.eng.fl_str_mv |
Stevia sweeteners chitosan flocculation clarification |
topic |
Stevia sweeteners chitosan flocculation clarification |
description |
Stevia is used as a sweetener due to its low calorific value and its taste, which is very similar to that of sucrose. After extraction from dried leaves, stevia extract is dark in colour, and therefore needs to be whitened to increase acceptance by consumers. In this study we tested chitosan, a cationic polyelectrolyte, as flocculant agent for the whitening of the Stevia extract. Positive charges of chitosan can interact electrostatically with a counter-ion, sodium tripolyphosphate (TPP), and then chitosan precipitates. A factorial design was used to study the whitening process, in which Glycosides Removal, Colour Removal, Turbidity Removal and Soluble Solids Removal were evaluated. The studied factors were Chitosan Mass and pH of the TPP solution. The results showed that chitosan is a good flocculant agent, being able to flocculate both the glycosides and the pigments that make the extract coloured. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012-01-01 |
dc.date.accessioned.fl_str_mv |
2015-06-14T13:43:31Z |
dc.date.available.fl_str_mv |
2015-06-14T13:43:31Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
Polímeros. Associação Brasileira de Polímeros, v. 22, n. 4, p. 401-406, 2012. |
dc.identifier.uri.fl_str_mv |
http://repositorio.unifesp.br/handle/11600/6886 http://dx.doi.org/10.1590/S0104-14282012005000066 |
dc.identifier.issn.none.fl_str_mv |
0104-1428 |
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S0104-14282012000400016.pdf |
dc.identifier.scielo.none.fl_str_mv |
S0104-14282012000400016 |
dc.identifier.doi.none.fl_str_mv |
10.1590/S0104-14282012005000066 |
dc.identifier.wos.none.fl_str_mv |
WOS:000313083600016 |
identifier_str_mv |
Polímeros. Associação Brasileira de Polímeros, v. 22, n. 4, p. 401-406, 2012. 0104-1428 S0104-14282012000400016.pdf S0104-14282012000400016 10.1590/S0104-14282012005000066 WOS:000313083600016 |
url |
http://repositorio.unifesp.br/handle/11600/6886 http://dx.doi.org/10.1590/S0104-14282012005000066 |
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Polímeros |
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401-406 |
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Associação Brasileira de Polímeros |
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Associação Brasileira de Polímeros |
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