Publication
Electrochemical sensor for simultaneous determination of herbicide MCPA and its metabolite 4-chloro-2-methylphenol. Application to photodegradation environmental monitoring
dc.contributor.author | Rahemi, V. | |
dc.contributor.author | Garrido, J. M. P. J. | |
dc.contributor.author | Borges, F. | |
dc.contributor.author | Brett, C. M. A. | |
dc.contributor.author | Garrido, E. M. P. J. | |
dc.date.accessioned | 2016-01-25T10:54:20Z | |
dc.date.available | 2016-01-25T10:54:20Z | |
dc.date.issued | 2015 | |
dc.description.abstract | The development and application of a polyaniline/carbon nanotube (CNT) cyclodextrin matrix (PANI-β-CD/MWCNT)-based electrochemical sensor for the quantitative determination of the herbicide 4-chloro-2-methylphenoxyacetic acid (MCPA) and its main transformation product 4-chloro-2-methylphenol in natural waters are described. A simple cyclic voltammetry-based electrochemical methodology, in phosphate buffer solution at pH 6.0, was used to develop a method to determine both MCPA and 4-chloro-2-methylphenol, without any previous extraction or derivatization steps. A linear concentration range (10 to 50 μmol L−1) and detection limits of 1.1 and 1.9 μmol L−1, respectively, were achieved using optimized cyclic voltammetric parameters. The proposed method was successfully applied to the determination of MCPA and 4-chloro-2-methylphenol in natural water samples with satisfactory recoveries (94 to 107 %) and in good agreement with the results obtained by an established high-performance liquid chromatography technique, no significant differences being found between the methods. Interferences from ionic species and other herbicides used for broad-leaf weed control were shown to be small. The newly developed methodology was also successfully applied to MCPA photodegradation environmental studies. | pt_PT |
dc.identifier.doi | 10.1007/s11356-014-3693-y | pt_PT |
dc.identifier.issn | 0944-1344 | |
dc.identifier.uri | http://hdl.handle.net/10400.22/7485 | |
dc.language.iso | eng | pt_PT |
dc.publisher | Springer | pt_PT |
dc.relation.ispartofseries | Environmental Science and Pollution Research;Vol. 22, Issue 6 | |
dc.relation.publisherversion | http://link.springer.com/article/10.1007/s11356-014-3693-y | pt_PT |
dc.subject | Herbicides | pt_PT |
dc.subject | MCPA | pt_PT |
dc.subject | 4-Chloro-2-methylphenol | pt_PT |
dc.subject | Voltammetric sensor | pt_PT |
dc.subject | Carbon nanotubes | pt_PT |
dc.title | Electrochemical sensor for simultaneous determination of herbicide MCPA and its metabolite 4-chloro-2-methylphenol. Application to photodegradation environmental monitoring | pt_PT |
dc.type | journal article | |
dspace.entity.type | Publication | |
oaire.citation.endPage | 4499 | pt_PT |
oaire.citation.issue | 6 | pt_PT |
oaire.citation.startPage | 4491 | pt_PT |
oaire.citation.title | Environmental Science and Pollution Research | pt_PT |
oaire.citation.volume | 22 | pt_PT |
rcaap.rights | restrictedAccess | pt_PT |
rcaap.type | article | pt_PT |