Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode
Main Author: | |
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Publication Date: | 2005 |
Other Authors: | , , |
Format: | Article |
Language: | eng |
Source: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Download full: | http://hdl.handle.net/10400.22/2947 |
Summary: | A square-wave voltammetric (SWV) method using a hanging mercury drop electrode (HMDE) has been developed for determination of the herbicide molinate in a biodegradation process. The method is based on controlled adsorptive accumulation of molinate for 10 s at a potential of -0.8 V versus AgCl/Ag. An anodic peak, due to oxidation of the adsorbed pesticide, was observed in the cyclic voltammogram at ca. -0.320 V versus AgCl/Ag; a very small cathodic peak was also detected. The SWV calibration plot was established to be linear in the range 5.0x10-6 to 9.0x10-6 mol L-1; this corresponded to a detection limit of 3.5x10-8 mol L-1. This electroanalytical method was used to monitor the decrease of molinate concentration in river waters along a biodegradation process using a bacterial mixed culture. The results achieved with this voltammetric method were compared with those obtained by use of a chromatographic method (HPLC–UV) and no significant statistical differences were observed. |
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Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrodeHanging mercury drop electrodeSquare-wave voltammetryMolinateBiodegradationA square-wave voltammetric (SWV) method using a hanging mercury drop electrode (HMDE) has been developed for determination of the herbicide molinate in a biodegradation process. The method is based on controlled adsorptive accumulation of molinate for 10 s at a potential of -0.8 V versus AgCl/Ag. An anodic peak, due to oxidation of the adsorbed pesticide, was observed in the cyclic voltammogram at ca. -0.320 V versus AgCl/Ag; a very small cathodic peak was also detected. The SWV calibration plot was established to be linear in the range 5.0x10-6 to 9.0x10-6 mol L-1; this corresponded to a detection limit of 3.5x10-8 mol L-1. This electroanalytical method was used to monitor the decrease of molinate concentration in river waters along a biodegradation process using a bacterial mixed culture. The results achieved with this voltammetric method were compared with those obtained by use of a chromatographic method (HPLC–UV) and no significant statistical differences were observed.Springer-VerlagRepositório Científico do Instituto Politécnico do PortoBarroso, M. FátimaNunes, O. C.Vaz, M. Carmo V. F.Delerue-Matos, Cristina2013-11-25T15:42:27Z20052005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/2947eng10.1007/s00216-004-2971-9info: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:RCAAP2023-03-13T12:42:33Zoai:recipp.ipp.pt:10400.22/2947Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:23:58.141054Repositório 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 |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
title |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
spellingShingle |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode Barroso, M. Fátima Hanging mercury drop electrode Square-wave voltammetry Molinate Biodegradation |
title_short |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
title_full |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
title_fullStr |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
title_full_unstemmed |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
title_sort |
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode |
author |
Barroso, M. Fátima |
author_facet |
Barroso, M. Fátima Nunes, O. C. Vaz, M. Carmo V. F. Delerue-Matos, Cristina |
author_role |
author |
author2 |
Nunes, O. C. Vaz, M. Carmo V. F. Delerue-Matos, Cristina |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Repositório Científico do Instituto Politécnico do Porto |
dc.contributor.author.fl_str_mv |
Barroso, M. Fátima Nunes, O. C. Vaz, M. Carmo V. F. Delerue-Matos, Cristina |
dc.subject.por.fl_str_mv |
Hanging mercury drop electrode Square-wave voltammetry Molinate Biodegradation |
topic |
Hanging mercury drop electrode Square-wave voltammetry Molinate Biodegradation |
description |
A square-wave voltammetric (SWV) method using a hanging mercury drop electrode (HMDE) has been developed for determination of the herbicide molinate in a biodegradation process. The method is based on controlled adsorptive accumulation of molinate for 10 s at a potential of -0.8 V versus AgCl/Ag. An anodic peak, due to oxidation of the adsorbed pesticide, was observed in the cyclic voltammogram at ca. -0.320 V versus AgCl/Ag; a very small cathodic peak was also detected. The SWV calibration plot was established to be linear in the range 5.0x10-6 to 9.0x10-6 mol L-1; this corresponded to a detection limit of 3.5x10-8 mol L-1. This electroanalytical method was used to monitor the decrease of molinate concentration in river waters along a biodegradation process using a bacterial mixed culture. The results achieved with this voltammetric method were compared with those obtained by use of a chromatographic method (HPLC–UV) and no significant statistical differences were observed. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005 2005-01-01T00:00:00Z 2013-11-25T15:42:27Z |
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/10400.22/2947 |
url |
http://hdl.handle.net/10400.22/2947 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1007/s00216-004-2971-9 |
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 |
Springer-Verlag |
publisher.none.fl_str_mv |
Springer-Verlag |
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 |
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RCAAP |
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RCAAP |
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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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799131334695714816 |