Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000600023 |
Resumo: | Simulated body fluids (SBFs) are largely used as biocompatibility screening and also as an alternative process to the plasma spray coating. Biomimetic processes occur heterogeneously on metallic surface; therefore, the use of a microelectrode technique is highly advisable to detect surface changes. In this work, the local pH was monitored during the first 44 h of deposition of calcium phosphates on titanium samples with a simplified SBF solution. Three-dimensional data (local pH, x-y coordinates) were used to simulate equilibrium concentrations of all species. Based on these quantities, relative supersaturations and Gibbs energy variations of hydroxyapatite and octacalcium phosphate were evaluated. The conjoint experimental and theoretical approach suggested that neither local alkalinity nor free calcium concentration alone produces an adequate scenario of precipitation conditions, but the use of both procedures results in interesting findings not achieved using only a single approach. |
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Journal of the Brazilian Chemical Society (Online) |
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Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurementsion-selective microelectrodehydroxyapatitelocal pHbiomimetic precipitationSimulated body fluids (SBFs) are largely used as biocompatibility screening and also as an alternative process to the plasma spray coating. Biomimetic processes occur heterogeneously on metallic surface; therefore, the use of a microelectrode technique is highly advisable to detect surface changes. In this work, the local pH was monitored during the first 44 h of deposition of calcium phosphates on titanium samples with a simplified SBF solution. Three-dimensional data (local pH, x-y coordinates) were used to simulate equilibrium concentrations of all species. Based on these quantities, relative supersaturations and Gibbs energy variations of hydroxyapatite and octacalcium phosphate were evaluated. The conjoint experimental and theoretical approach suggested that neither local alkalinity nor free calcium concentration alone produces an adequate scenario of precipitation conditions, but the use of both procedures results in interesting findings not achieved using only a single approach.Sociedade Brasileira de Química2013-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000600023Journal of the Brazilian Chemical Society v.24 n.6 2013reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20130137info:eu-repo/semantics/openAccessPlatt,Gustavo M.Bastos,Ivan N.Andrade,Mônica C. deTaryba,MarinaLamaka,Sviatlana V.Simões,AldaSoares,Glória D.eng2013-06-27T00:00:00Zoai:scielo:S0103-50532013000600023Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2013-06-27T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
title |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
spellingShingle |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements Platt,Gustavo M. ion-selective microelectrode hydroxyapatite local pH biomimetic precipitation |
title_short |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
title_full |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
title_fullStr |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
title_full_unstemmed |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
title_sort |
Thermodynamic simulation of phosphate precipitation based on ion-selective microelectrode measurements |
author |
Platt,Gustavo M. |
author_facet |
Platt,Gustavo M. Bastos,Ivan N. Andrade,Mônica C. de Taryba,Marina Lamaka,Sviatlana V. Simões,Alda Soares,Glória D. |
author_role |
author |
author2 |
Bastos,Ivan N. Andrade,Mônica C. de Taryba,Marina Lamaka,Sviatlana V. Simões,Alda Soares,Glória D. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Platt,Gustavo M. Bastos,Ivan N. Andrade,Mônica C. de Taryba,Marina Lamaka,Sviatlana V. Simões,Alda Soares,Glória D. |
dc.subject.por.fl_str_mv |
ion-selective microelectrode hydroxyapatite local pH biomimetic precipitation |
topic |
ion-selective microelectrode hydroxyapatite local pH biomimetic precipitation |
description |
Simulated body fluids (SBFs) are largely used as biocompatibility screening and also as an alternative process to the plasma spray coating. Biomimetic processes occur heterogeneously on metallic surface; therefore, the use of a microelectrode technique is highly advisable to detect surface changes. In this work, the local pH was monitored during the first 44 h of deposition of calcium phosphates on titanium samples with a simplified SBF solution. Three-dimensional data (local pH, x-y coordinates) were used to simulate equilibrium concentrations of all species. Based on these quantities, relative supersaturations and Gibbs energy variations of hydroxyapatite and octacalcium phosphate were evaluated. The conjoint experimental and theoretical approach suggested that neither local alkalinity nor free calcium concentration alone produces an adequate scenario of precipitation conditions, but the use of both procedures results in interesting findings not achieved using only a single approach. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000600023 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000600023 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20130137 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.24 n.6 2013 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318174910283776 |