Chitosan as flocculant agent for clarification of stevia extract

Show simple item record Oliveira, Silvia P. D. de Mahl, Cynthia Regina Albrecht Simões, Márcia R. Silva, Classius Ferreira da [UNIFESP] 2015-06-14T13:43:31Z 2015-06-14T13:43:31Z 2012-01-01
dc.identifier.citation Polímeros. Associação Brasileira de Polímeros, v. 22, n. 4, p. 401-406, 2012.
dc.identifier.issn 0104-1428
dc.description.abstract 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. en
dc.format.extent 401-406
dc.language.iso eng
dc.publisher Associação Brasileira de Polímeros
dc.relation.ispartof Polímeros
dc.rights Acesso aberto
dc.subject Stevia en
dc.subject sweeteners en
dc.subject chitosan en
dc.subject flocculation en
dc.subject clarification en
dc.title Chitosan as flocculant agent for clarification of stevia extract en
dc.type Artigo
dc.contributor.institution UNIOESTE Centro de Engenharias e Ciências Exatas
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation UNIOESTE Centro de Engenharias e Ciências Exatas
dc.description.affiliation UNIFESP Centro de Ciências Exatas e da Terra
dc.description.affiliationUnifesp UNIFESP, Centro de Ciências Exatas e da Terra
dc.identifier.file S0104-14282012000400016.pdf
dc.identifier.scielo S0104-14282012000400016
dc.identifier.doi 10.1590/S0104-14282012005000066
dc.description.source SciELO
dc.identifier.wos WOS:000313083600016


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