Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/16702 |
Resumo: | Partition of 12 nonionic organic compounds in aqueous PEG-8000–Na2SO4 two-phase system was examined. Effects of four salt additives (NaCl, NaSCN, NaClO4, and NaH2PO4) in the concentration range from 0.027 up to ca. 1.9 M on binodal curve of PEG-sulfate two-phase system and solute partitioning were explored. It was found that different salt additives at the relatively high concentrations display different effects on both phase separation and partition of various nonionic solutes. Analysis of the results indicates that the PEG–Na2SO4 ATPS with the up to 0.215 M NaCl concentration may be viewed as similar to the ATPS without NaCl in terms of the Collander equation’s predictive ability of the partitioning behavior of nonionic compounds. All ATPS with each of the salt additive used at the concentration of 0.027 M may be viewed as similar to each other as the Collander equation holds for partition coefficients of nonionic solutes in these ATPS. Collander equation is valid also for the compounds examined in the ATPS with additives of NaSCN and NaClO4 at the concentrations up to 0.215 M. The observed similarity between these ATPS might be explained by the similar effects of these two salts on the water structure. At concentrations of the salt additives exceeding the aforementioned values, different effects of salt additives on partitioning of various nonionic solutes are displayed. In order to explain these effects of salt additives it is necessary to examine the intensities of different solute–solvent interactions in these ATPS within the framework of the so-called Linear Solvation Energy Relationship (LSER) model. |
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Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase systemAqueous two-phase systemsSalt additivesNon-ionic solutes partitioningCollander equationScience & TechnologyPartition of 12 nonionic organic compounds in aqueous PEG-8000–Na2SO4 two-phase system was examined. Effects of four salt additives (NaCl, NaSCN, NaClO4, and NaH2PO4) in the concentration range from 0.027 up to ca. 1.9 M on binodal curve of PEG-sulfate two-phase system and solute partitioning were explored. It was found that different salt additives at the relatively high concentrations display different effects on both phase separation and partition of various nonionic solutes. Analysis of the results indicates that the PEG–Na2SO4 ATPS with the up to 0.215 M NaCl concentration may be viewed as similar to the ATPS without NaCl in terms of the Collander equation’s predictive ability of the partitioning behavior of nonionic compounds. All ATPS with each of the salt additive used at the concentration of 0.027 M may be viewed as similar to each other as the Collander equation holds for partition coefficients of nonionic solutes in these ATPS. Collander equation is valid also for the compounds examined in the ATPS with additives of NaSCN and NaClO4 at the concentrations up to 0.215 M. The observed similarity between these ATPS might be explained by the similar effects of these two salts on the water structure. At concentrations of the salt additives exceeding the aforementioned values, different effects of salt additives on partitioning of various nonionic solutes are displayed. In order to explain these effects of salt additives it is necessary to examine the intensities of different solute–solvent interactions in these ATPS within the framework of the so-called Linear Solvation Energy Relationship (LSER) model.Luisa A. Ferreira acknowledges the financial support (SFRH/BPD/47607/2008) from Fundacao para a Ciencia e a Tecnologia (Lisboa, Portugal).ElsevierUniversidade do MinhoFerreira, Luísa A.Teixeira, J. A.Mikheeva, Larissa M.Chait, ArnonZaslavsky, Boris Y.20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/16702eng0021-967310.1016/j.chroma.2011.05.06821665218info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:08:46Zoai:repositorium.sdum.uminho.pt:1822/16702Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:00:02.291893Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
title |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
spellingShingle |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system Ferreira, Luísa A. Aqueous two-phase systems Salt additives Non-ionic solutes partitioning Collander equation Science & Technology |
title_short |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
title_full |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
title_fullStr |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
title_full_unstemmed |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
title_sort |
Effect of salt additives on partition of nonionic solutes in aqueous PEG–sodium sulfate two-phase system |
author |
Ferreira, Luísa A. |
author_facet |
Ferreira, Luísa A. Teixeira, J. A. Mikheeva, Larissa M. Chait, Arnon Zaslavsky, Boris Y. |
author_role |
author |
author2 |
Teixeira, J. A. Mikheeva, Larissa M. Chait, Arnon Zaslavsky, Boris Y. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ferreira, Luísa A. Teixeira, J. A. Mikheeva, Larissa M. Chait, Arnon Zaslavsky, Boris Y. |
dc.subject.por.fl_str_mv |
Aqueous two-phase systems Salt additives Non-ionic solutes partitioning Collander equation Science & Technology |
topic |
Aqueous two-phase systems Salt additives Non-ionic solutes partitioning Collander equation Science & Technology |
description |
Partition of 12 nonionic organic compounds in aqueous PEG-8000–Na2SO4 two-phase system was examined. Effects of four salt additives (NaCl, NaSCN, NaClO4, and NaH2PO4) in the concentration range from 0.027 up to ca. 1.9 M on binodal curve of PEG-sulfate two-phase system and solute partitioning were explored. It was found that different salt additives at the relatively high concentrations display different effects on both phase separation and partition of various nonionic solutes. Analysis of the results indicates that the PEG–Na2SO4 ATPS with the up to 0.215 M NaCl concentration may be viewed as similar to the ATPS without NaCl in terms of the Collander equation’s predictive ability of the partitioning behavior of nonionic compounds. All ATPS with each of the salt additive used at the concentration of 0.027 M may be viewed as similar to each other as the Collander equation holds for partition coefficients of nonionic solutes in these ATPS. Collander equation is valid also for the compounds examined in the ATPS with additives of NaSCN and NaClO4 at the concentrations up to 0.215 M. The observed similarity between these ATPS might be explained by the similar effects of these two salts on the water structure. At concentrations of the salt additives exceeding the aforementioned values, different effects of salt additives on partitioning of various nonionic solutes are displayed. In order to explain these effects of salt additives it is necessary to examine the intensities of different solute–solvent interactions in these ATPS within the framework of the so-called Linear Solvation Energy Relationship (LSER) model. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 2011-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/16702 |
url |
http://hdl.handle.net/1822/16702 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0021-9673 10.1016/j.chroma.2011.05.068 21665218 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132394379280384 |