o-DGT Devices for the Determination of Emerging Contaminants in Aqueous Matrices
AUTOR(ES)
Wacheski, Tiago; Hara, Emerson L. Y.; Soares, Barbara G. S.; Silva, Bruno J. G. da; Abate, Gilberto; Grassi, Marco T.
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2021-01
RESUMO
Samplers based on the diffusive gradients in thin films for organics (o-DGT) were developed and applied in Brazilian aqueous matrices for the determination of four emerging contaminants (EC): 4-octylphenol, 4-nonylphenol, triclosan, and bisphenol A. The OASIS HLB resin used as the binding phase presented a high sorption capacity and the extraction associated with sonication, using a mixture of acetonitrile and methanol (2:1, v v-1) as the solvent, provided a higher desorbed mass of the compounds. The diffusion coefficients determined experimentally were in the range of the values found in the literature and the pH and ionic strength influenced the sorption of some compounds by the binding phase. The substances were detected and quantified in tap and river water samples after 7 days of deployment using gas chromatography tandem mass spectrometry (GC-MS/MS). Finally, the results indicate deficiencies in the current wastewater, as well as water treatment systems, and could contribute in the future to the improvement of public policies on basic sanitation in Brazil.
Documentos Relacionados
- Emerging Contaminants in Trans-American Waters
- Electrochemical biosensor-based devices for continuous phenols monitoring in environmental matrices
- A Simple and Effective Liquid-Liquid-Liquid Microextraction Method with Ultraviolet Spectrophotometric Detection for the Determination of Bisphenol A in Aqueous Matrices and Plastic Leachates
- Development of a digestion method for the determination of inorganic contaminants in polyvinyl acetate (PVAc)
- Methods for direct determination of mitomycin C in aqueous solutions and in urine