Publication
Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode
| dc.contributor.author | Barroso, M. Fátima | |
| dc.contributor.author | Nunes, O. C. | |
| dc.contributor.author | Vaz, M. Carmo V. F. | |
| dc.contributor.author | Delerue-Matos, Cristina | |
| dc.date.accessioned | 2013-11-25T15:42:27Z | |
| dc.date.available | 2013-11-25T15:42:27Z | |
| dc.date.issued | 2005 | |
| dc.description.abstract | 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. | por |
| dc.identifier.doi | 10.1007/s00216-004-2971-9 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.22/2947 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Springer-Verlag | por |
| dc.relation.ispartofseries | Analytical and Bioanalytical Chemistry; Vol. 381, Issue 4 | |
| dc.relation.publisherversion | http://link.springer.com/article/10.1007%2Fs00216-004-2971-9 | por |
| dc.subject | Hanging mercury drop electrode | por |
| dc.subject | Square-wave voltammetry | por |
| dc.subject | Molinate | por |
| dc.subject | Biodegradation | por |
| dc.title | Square-wave voltametric method for determination of molinate concentration in a biological process using a hanging mercury drop electrode | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 883 | por |
| oaire.citation.issue | Issue 4 | |
| oaire.citation.startPage | 879 | por |
| oaire.citation.title | Analytical and Bioanalytical Chemistry | por |
| oaire.citation.volume | Vol. 381 | por |
| person.familyName | de Sá Barroso | |
| person.familyName | Delerue-Matos | |
| person.givenName | Maria de Fátima | |
| person.givenName | Cristina | |
| person.identifier.ciencia-id | AF16-22E5-5EBD | |
| person.identifier.ciencia-id | 9A1A-43FB-5C27 | |
| person.identifier.orcid | 0000-0001-9011-5992 | |
| person.identifier.orcid | 0000-0002-3924-776X | |
| person.identifier.rid | D-4990-2013 | |
| person.identifier.scopus-author-id | 25631648000 | |
| person.identifier.scopus-author-id | 6603741848 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 3d701c85-4580-4614-be6d-5a1abc8cf729 | |
| relation.isAuthorOfPublication | 09f6a7bd-2f15-42b0-adc5-04bd22210519 | |
| relation.isAuthorOfPublication.latestForDiscovery | 09f6a7bd-2f15-42b0-adc5-04bd22210519 |