Potentiometric chemical sensors for the detection of paralytic shellfish toxins
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/10773/37693 |
Resumo: | Potentiometric chemical sensors for the detection of paralytic shellfish toxins have been developed. Four toxins typically encountered in Portuguese waters, namely saxitoxin, decarbamoyl saxitoxin, gonyautoxin GTX5 and C1&C2, were selected for the study. A series of miniaturized sensors with solid inner contact and plasticized polyvinylchloride membranes containing ionophores, nine compositions in total, were prepared and their characteristics evaluated. Sensors displayed cross-sensitivity to four studied toxins, i.e. response to several toxins together with low selectivity. High selectivity towards paralytic shellfish toxins was observed in the presence of inorganic cations with selectivity coefficients ranging from 0.04 to 0.001 for Na+ and K+ and 3.6*10-4 to 3.4*10-5 for Ca2+. Detection limits were in the range from 0.25 to 0.9 μmolL-1 for saxitoxin and decarbamoyl saxitoxin, and from 0.08 to 1.8 μmolL-1 for GTX5 and C1&C2, which allows toxin detection at the concentration levels corresponding to the legal limits. Characteristics of the developed sensors allow their use in the electronic tongue multisensor system for simultaneous quantification of paralytic shellfish toxins. |
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Potentiometric chemical sensors for the detection of paralytic shellfish toxinsChemical sensorsParalytic shellfish toxinsPotentiometryIonophoresPotentiometric chemical sensors for the detection of paralytic shellfish toxins have been developed. Four toxins typically encountered in Portuguese waters, namely saxitoxin, decarbamoyl saxitoxin, gonyautoxin GTX5 and C1&C2, were selected for the study. A series of miniaturized sensors with solid inner contact and plasticized polyvinylchloride membranes containing ionophores, nine compositions in total, were prepared and their characteristics evaluated. Sensors displayed cross-sensitivity to four studied toxins, i.e. response to several toxins together with low selectivity. High selectivity towards paralytic shellfish toxins was observed in the presence of inorganic cations with selectivity coefficients ranging from 0.04 to 0.001 for Na+ and K+ and 3.6*10-4 to 3.4*10-5 for Ca2+. Detection limits were in the range from 0.25 to 0.9 μmolL-1 for saxitoxin and decarbamoyl saxitoxin, and from 0.08 to 1.8 μmolL-1 for GTX5 and C1&C2, which allows toxin detection at the concentration levels corresponding to the legal limits. Characteristics of the developed sensors allow their use in the electronic tongue multisensor system for simultaneous quantification of paralytic shellfish toxins.Elsevier2023-05-11T15:00:58Z2018-05-01T00:00:00Z2018-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37693eng0039-914010.1016/j.talanta.2018.01.031Ferreira, Nádia S.Cruz, Marco G. N.Gomes, Maria Teresa S.R.Rudnitskaya, Alisainfo: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:RCAAP2024-02-22T12:13:37Zoai:ria.ua.pt:10773/37693Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:08:17.889711Repositório 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 |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
title |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
spellingShingle |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins Ferreira, Nádia S. Chemical sensors Paralytic shellfish toxins Potentiometry Ionophores |
title_short |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
title_full |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
title_fullStr |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
title_full_unstemmed |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
title_sort |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins |
author |
Ferreira, Nádia S. |
author_facet |
Ferreira, Nádia S. Cruz, Marco G. N. Gomes, Maria Teresa S.R. Rudnitskaya, Alisa |
author_role |
author |
author2 |
Cruz, Marco G. N. Gomes, Maria Teresa S.R. Rudnitskaya, Alisa |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ferreira, Nádia S. Cruz, Marco G. N. Gomes, Maria Teresa S.R. Rudnitskaya, Alisa |
dc.subject.por.fl_str_mv |
Chemical sensors Paralytic shellfish toxins Potentiometry Ionophores |
topic |
Chemical sensors Paralytic shellfish toxins Potentiometry Ionophores |
description |
Potentiometric chemical sensors for the detection of paralytic shellfish toxins have been developed. Four toxins typically encountered in Portuguese waters, namely saxitoxin, decarbamoyl saxitoxin, gonyautoxin GTX5 and C1&C2, were selected for the study. A series of miniaturized sensors with solid inner contact and plasticized polyvinylchloride membranes containing ionophores, nine compositions in total, were prepared and their characteristics evaluated. Sensors displayed cross-sensitivity to four studied toxins, i.e. response to several toxins together with low selectivity. High selectivity towards paralytic shellfish toxins was observed in the presence of inorganic cations with selectivity coefficients ranging from 0.04 to 0.001 for Na+ and K+ and 3.6*10-4 to 3.4*10-5 for Ca2+. Detection limits were in the range from 0.25 to 0.9 μmolL-1 for saxitoxin and decarbamoyl saxitoxin, and from 0.08 to 1.8 μmolL-1 for GTX5 and C1&C2, which allows toxin detection at the concentration levels corresponding to the legal limits. Characteristics of the developed sensors allow their use in the electronic tongue multisensor system for simultaneous quantification of paralytic shellfish toxins. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-05-01T00:00:00Z 2018-05-01 2023-05-11T15:00:58Z |
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/10773/37693 |
url |
http://hdl.handle.net/10773/37693 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0039-9140 10.1016/j.talanta.2018.01.031 |
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 |
instname_str |
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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1799137735882047488 |