Multivariate optimization for cloud point extraction and determination of lanthanides
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 UFRGS |
Texto Completo: | http://hdl.handle.net/10183/85284 |
Resumo: | A cloud point extraction (CPE) method is proposed for pre-concentration of lanthanides and subsequent determination using inductively coupled plasma optical emission spectrometry (ICP OES). Octylphenoxypolyethoxyethanol (Triton X-114) and 1-(2-thenoyl)-3,3,3-trifluoraceton (TTA) are used as surfactant and complexant of the lanthanides, respectively. A three-factor Doehlert matrix design with seven, five, and three levels is used to optimize the TTA and Triton X-114 concentration and the pH of the solution, respectively. The better conditions for pre-concentration are 0.001 to 0.005 mol L 1 TTA, 0.05 to 0.3% (m/v) Triton X-114 and pH from 5.5 to 7.0. Under these conditions, the fourteen naturally occurring lanthanide elements can be pre-concentrated together and then measured. The conditions established were pH 6.0 and 0.175 (m/v) Triton X-114 for all investigated elements; 0.005 mol L 1 TTA for Sm, Eu, Gd, Tb, Ho, Yb and Lu; and 0.001 mol L 1 TTA for La, Ce, Pr, Nd, Dy, Er and Tm. By using axially viewed plasma and pneumatic nebulization/aerosol desolvation, the limits of detection were 0.028, 0.099, 0.103, 0.020, 0.018, 0.014, 0.013, 0.047, 0.015, 0.009, 0.022, 0.003, 0.002 and 0.002 mg L 1 for La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, respectively. The proposed method was applied for lanthanides determination in mineral water, river water and reference water. |
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Depoi, Fernanda dos SantosBentlin, Fabrina Regia StummFerrão, Marco FlôresPozebon, Dirce2014-01-04T01:52:05Z20121759-9660http://hdl.handle.net/10183/85284000857109A cloud point extraction (CPE) method is proposed for pre-concentration of lanthanides and subsequent determination using inductively coupled plasma optical emission spectrometry (ICP OES). Octylphenoxypolyethoxyethanol (Triton X-114) and 1-(2-thenoyl)-3,3,3-trifluoraceton (TTA) are used as surfactant and complexant of the lanthanides, respectively. A three-factor Doehlert matrix design with seven, five, and three levels is used to optimize the TTA and Triton X-114 concentration and the pH of the solution, respectively. The better conditions for pre-concentration are 0.001 to 0.005 mol L 1 TTA, 0.05 to 0.3% (m/v) Triton X-114 and pH from 5.5 to 7.0. Under these conditions, the fourteen naturally occurring lanthanide elements can be pre-concentrated together and then measured. The conditions established were pH 6.0 and 0.175 (m/v) Triton X-114 for all investigated elements; 0.005 mol L 1 TTA for Sm, Eu, Gd, Tb, Ho, Yb and Lu; and 0.001 mol L 1 TTA for La, Ce, Pr, Nd, Dy, Er and Tm. By using axially viewed plasma and pneumatic nebulization/aerosol desolvation, the limits of detection were 0.028, 0.099, 0.103, 0.020, 0.018, 0.014, 0.013, 0.047, 0.015, 0.009, 0.022, 0.003, 0.002 and 0.002 mg L 1 for La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, respectively. The proposed method was applied for lanthanides determination in mineral water, river water and reference water.application/pdfengAnalytical Methods. London. Vol. 4, no. 9 (2012), p. 2809-2014LantanídeosExtração no ponto de nuvemEspectrometria de emissão ótica com plasma indutivamente acopladoMultivariate optimization for cloud point extraction and determination of lanthanidesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000857109.pdf000857109.pdfTexto completo (inglês)application/pdf470094http://www.lume.ufrgs.br/bitstream/10183/85284/1/000857109.pdfebab38221d7cf486ab905703898f4bb6MD51TEXT000857109.pdf.txt000857109.pdf.txtExtracted Texttext/plain25674http://www.lume.ufrgs.br/bitstream/10183/85284/2/000857109.pdf.txte4cd95a2f7cfe9cd7a705f5c19dc312fMD52THUMBNAIL000857109.pdf.jpg000857109.pdf.jpgGenerated Thumbnailimage/jpeg2059http://www.lume.ufrgs.br/bitstream/10183/85284/3/000857109.pdf.jpg6e43ada8052ff5947981463a6b546a01MD5310183/852842018-10-18 07:41:49.076oai:www.lume.ufrgs.br:10183/85284Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-18T10:41:49Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Multivariate optimization for cloud point extraction and determination of lanthanides |
title |
Multivariate optimization for cloud point extraction and determination of lanthanides |
spellingShingle |
Multivariate optimization for cloud point extraction and determination of lanthanides Depoi, Fernanda dos Santos Lantanídeos Extração no ponto de nuvem Espectrometria de emissão ótica com plasma indutivamente acoplado |
title_short |
Multivariate optimization for cloud point extraction and determination of lanthanides |
title_full |
Multivariate optimization for cloud point extraction and determination of lanthanides |
title_fullStr |
Multivariate optimization for cloud point extraction and determination of lanthanides |
title_full_unstemmed |
Multivariate optimization for cloud point extraction and determination of lanthanides |
title_sort |
Multivariate optimization for cloud point extraction and determination of lanthanides |
author |
Depoi, Fernanda dos Santos |
author_facet |
Depoi, Fernanda dos Santos Bentlin, Fabrina Regia Stumm Ferrão, Marco Flôres Pozebon, Dirce |
author_role |
author |
author2 |
Bentlin, Fabrina Regia Stumm Ferrão, Marco Flôres Pozebon, Dirce |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Depoi, Fernanda dos Santos Bentlin, Fabrina Regia Stumm Ferrão, Marco Flôres Pozebon, Dirce |
dc.subject.por.fl_str_mv |
Lantanídeos Extração no ponto de nuvem Espectrometria de emissão ótica com plasma indutivamente acoplado |
topic |
Lantanídeos Extração no ponto de nuvem Espectrometria de emissão ótica com plasma indutivamente acoplado |
description |
A cloud point extraction (CPE) method is proposed for pre-concentration of lanthanides and subsequent determination using inductively coupled plasma optical emission spectrometry (ICP OES). Octylphenoxypolyethoxyethanol (Triton X-114) and 1-(2-thenoyl)-3,3,3-trifluoraceton (TTA) are used as surfactant and complexant of the lanthanides, respectively. A three-factor Doehlert matrix design with seven, five, and three levels is used to optimize the TTA and Triton X-114 concentration and the pH of the solution, respectively. The better conditions for pre-concentration are 0.001 to 0.005 mol L 1 TTA, 0.05 to 0.3% (m/v) Triton X-114 and pH from 5.5 to 7.0. Under these conditions, the fourteen naturally occurring lanthanide elements can be pre-concentrated together and then measured. The conditions established were pH 6.0 and 0.175 (m/v) Triton X-114 for all investigated elements; 0.005 mol L 1 TTA for Sm, Eu, Gd, Tb, Ho, Yb and Lu; and 0.001 mol L 1 TTA for La, Ce, Pr, Nd, Dy, Er and Tm. By using axially viewed plasma and pneumatic nebulization/aerosol desolvation, the limits of detection were 0.028, 0.099, 0.103, 0.020, 0.018, 0.014, 0.013, 0.047, 0.015, 0.009, 0.022, 0.003, 0.002 and 0.002 mg L 1 for La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, respectively. The proposed method was applied for lanthanides determination in mineral water, river water and reference water. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2014-01-04T01:52:05Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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format |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/85284 |
dc.identifier.issn.pt_BR.fl_str_mv |
1759-9660 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000857109 |
identifier_str_mv |
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url |
http://hdl.handle.net/10183/85284 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Analytical Methods. London. Vol. 4, no. 9 (2012), p. 2809-2014 |
dc.rights.driver.fl_str_mv |
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eu_rights_str_mv |
openAccess |
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