Electroanalysis of Heavy Metals in the Cork of Quercus Suber

Detalhes bibliográficos
Autor(a) principal: Ponte-e-Sousa, João
Data de Publicação: 2003
Outros Autores: Neto-Vaz, António, Teixeira, Jorge
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/2980
Resumo: This will enable Pb(II) determination optimisation, regarding environmental aspects of the perpetuation of Quercus suber Montado (similar to Forest). It will also allow a more profound toxicological quality control of corks (barks). These two last referred aspects are very related ones, once accepted that the more advanced could the certification of the quality patterns of corks (barks) be, more will be the sustainability of Quercus suber ecosystem. Which we believe can be done, amongst other vectors, by studying such an important environmental issue as heavy metals. It is shown that Pb(II) quantification in the cork (bark) of Quercus suber tree (Cork Oak) is possible, using Differential Pulse Anodic Stripping Voltammetry (DPASV). The samples digestion was made in a mixture of H2O2 and HNO3 1:8, in a closed recipient at approximately 90 ºC. The measures were made in NaCl 0.1 M, using a Hanging Mercury Drop Electrode, a Glassy-Carbon Rod Counter Electrode, and an Ag/AgCl/KCl 3M reference electrode, after a 180 s deposition step. The results have shown the determination of a coherent stripping potential of -0.405 V (SD=0.0005 V), and a fine linear adjustment after the standard addition method (R2 = 0.997). They have also revealed the interest of further studies. The need to test other electroanalysis requisites was understood, and imposed by the proof of the complex nature of the matrix.
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spelling Electroanalysis of Heavy Metals in the Cork of Quercus Subercork (bark)Pb(II)Differential Pulse AnodicenvironmentThis will enable Pb(II) determination optimisation, regarding environmental aspects of the perpetuation of Quercus suber Montado (similar to Forest). It will also allow a more profound toxicological quality control of corks (barks). These two last referred aspects are very related ones, once accepted that the more advanced could the certification of the quality patterns of corks (barks) be, more will be the sustainability of Quercus suber ecosystem. Which we believe can be done, amongst other vectors, by studying such an important environmental issue as heavy metals. It is shown that Pb(II) quantification in the cork (bark) of Quercus suber tree (Cork Oak) is possible, using Differential Pulse Anodic Stripping Voltammetry (DPASV). The samples digestion was made in a mixture of H2O2 and HNO3 1:8, in a closed recipient at approximately 90 ºC. The measures were made in NaCl 0.1 M, using a Hanging Mercury Drop Electrode, a Glassy-Carbon Rod Counter Electrode, and an Ag/AgCl/KCl 3M reference electrode, after a 180 s deposition step. The results have shown the determination of a coherent stripping potential of -0.405 V (SD=0.0005 V), and a fine linear adjustment after the standard addition method (R2 = 0.997). They have also revealed the interest of further studies. The need to test other electroanalysis requisites was understood, and imposed by the proof of the complex nature of the matrix.Portugaliae Electrochimica Acta2011-12-22T17:35:40Z2011-12-222003-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/2980http://hdl.handle.net/10174/2980engjcps@uevora.ptnvaz@uevora.ptjmgt@uevora.ptPonte-e-Sousa, JoãoNeto-Vaz, AntónioTeixeira, Jorgeinfo: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:RCAAP2024-01-03T18:39:45Zoai:dspace.uevora.pt:10174/2980Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:58:31.104951Repositório 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 Electroanalysis of Heavy Metals in the Cork of Quercus Suber
title Electroanalysis of Heavy Metals in the Cork of Quercus Suber
spellingShingle Electroanalysis of Heavy Metals in the Cork of Quercus Suber
Ponte-e-Sousa, João
cork (bark)
Pb(II)
Differential Pulse Anodic
environment
title_short Electroanalysis of Heavy Metals in the Cork of Quercus Suber
title_full Electroanalysis of Heavy Metals in the Cork of Quercus Suber
title_fullStr Electroanalysis of Heavy Metals in the Cork of Quercus Suber
title_full_unstemmed Electroanalysis of Heavy Metals in the Cork of Quercus Suber
title_sort Electroanalysis of Heavy Metals in the Cork of Quercus Suber
author Ponte-e-Sousa, João
author_facet Ponte-e-Sousa, João
Neto-Vaz, António
Teixeira, Jorge
author_role author
author2 Neto-Vaz, António
Teixeira, Jorge
author2_role author
author
dc.contributor.author.fl_str_mv Ponte-e-Sousa, João
Neto-Vaz, António
Teixeira, Jorge
dc.subject.por.fl_str_mv cork (bark)
Pb(II)
Differential Pulse Anodic
environment
topic cork (bark)
Pb(II)
Differential Pulse Anodic
environment
description This will enable Pb(II) determination optimisation, regarding environmental aspects of the perpetuation of Quercus suber Montado (similar to Forest). It will also allow a more profound toxicological quality control of corks (barks). These two last referred aspects are very related ones, once accepted that the more advanced could the certification of the quality patterns of corks (barks) be, more will be the sustainability of Quercus suber ecosystem. Which we believe can be done, amongst other vectors, by studying such an important environmental issue as heavy metals. It is shown that Pb(II) quantification in the cork (bark) of Quercus suber tree (Cork Oak) is possible, using Differential Pulse Anodic Stripping Voltammetry (DPASV). The samples digestion was made in a mixture of H2O2 and HNO3 1:8, in a closed recipient at approximately 90 ºC. The measures were made in NaCl 0.1 M, using a Hanging Mercury Drop Electrode, a Glassy-Carbon Rod Counter Electrode, and an Ag/AgCl/KCl 3M reference electrode, after a 180 s deposition step. The results have shown the determination of a coherent stripping potential of -0.405 V (SD=0.0005 V), and a fine linear adjustment after the standard addition method (R2 = 0.997). They have also revealed the interest of further studies. The need to test other electroanalysis requisites was understood, and imposed by the proof of the complex nature of the matrix.
publishDate 2003
dc.date.none.fl_str_mv 2003-09-01T00:00:00Z
2011-12-22T17:35:40Z
2011-12-22
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/2980
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dc.language.iso.fl_str_mv eng
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dc.relation.none.fl_str_mv jcps@uevora.pt
nvaz@uevora.pt
jmgt@uevora.pt
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dc.publisher.none.fl_str_mv Portugaliae Electrochimica Acta
publisher.none.fl_str_mv Portugaliae Electrochimica Acta
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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