Method development for simultaneous determination of polar and nonpolar pesticides in surface water by low-temperature partitioning extraction (LTPE) followed by HPLC-ESI-MS/MS.

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dc.contributor.authorBarros, André Luis Corrêa de
dc.contributor.authorAbreu, Cíntia Grossi de
dc.contributor.authorCunha, Camila Cristina Rodrigues Ferreira da
dc.contributor.authorRodrigues, Daniel Aparecido da Silva
dc.contributor.authorAfonso, Robson José de Cássia Franco
dc.contributor.authorSilva, Gilmare Antônia da
dc.date.accessioned2020-06-15T14:42:38Z
dc.date.available2020-06-15T14:42:38Z
dc.date.issued2019
dc.description.abstractDuring this research, chemometric approaches were applied for optimization of the low-temperature partitioning extraction (LTPE) for the simultaneous analysis of the pesticides: acephate, difenoconazole, fenamidone, fluazifop, fluazinam, methamidophos, and thiamethoxam from surface water samples and determination by high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry. It was used the 23 full factorial and the Doehlert experimental designs. The extraction technique was optimized by evaluating the effects of the three variables: sample pH, ionic strength (addition of Na2HPO4), and organic solvent volume. Considering the interest to find an optimal condition for all analytes simultaneously, the best extraction parameters found were as follows: pH = 5.33, concentration of Na2HPO4 = 0.0088 mol L−1 and organic phase volume = 4.5 mL. The optimized methodology showed LOD and LOQ levels from 0.33 to 8.13 ng L−1 and from 1.09 to 26.84 ng L−1, respectively. The recovery values ranged from 38.37 and 99.83% and the RSD values varied from 2.33 to 18.92%. The method was applied to surface water analysis sampled in areas with intensive agricultural practices in Ouro Branco City, Minas Gerais, Brazil. The difenoconazole was detected in concentrations between 12.53 and 94.76 ng L−1.pt_BR
dc.identifier.citationBARROS, A. L. C. et al. Method development for simultaneous determination of polar and nonpolar pesticides in surface water by low-temperature partitioning extraction (LTPE) followed by HPLC-ESI-MS/MS. Environmental Science and Pollution Research, v. 26, p. 31609–31622, set. 2019. Disponível em: <https://link.springer.com/article/10.1007/s11356-019-06286-5>. Acesso em: 10 fev. 2020.pt_BR
dc.identifier.doihttps://doi.org/10.1007/s11356-019-06286-5pt_BR
dc.identifier.issn1614-7499
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12344
dc.identifier.uri2https://link.springer.com/article/10.1007/s11356-019-06286-5pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectMultivariate optimizationpt_BR
dc.subjectMass spectrometrypt_BR
dc.titleMethod development for simultaneous determination of polar and nonpolar pesticides in surface water by low-temperature partitioning extraction (LTPE) followed by HPLC-ESI-MS/MS.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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