info:eu-repo/semantics/article
Volcanic ashes as a source for nitrated and oxygenated polycyclic aromatic hydrocarbon pollution
Fecha
2020-05Registro en:
Guiñez, María Evangelina; Escudero, Luis Ariel; Mandelli Roubineau, Alejandro Luis; Martinez, Luis Dante; Cerutti, Estela Soledad; Volcanic ashes as a source for nitrated and oxygenated polycyclic aromatic hydrocarbon pollution; Springer Heidelberg; Environmental Science and Pollution Research; 27; 14; 5-2020; 16972-16982
0944-1344
CONICET Digital
CONICET
Autor
Guiñez, María Evangelina
Escudero, Luis Ariel
Mandelli Roubineau, Alejandro Luis
Martinez, Luis Dante
Cerutti, Estela Soledad
Resumen
In this study, a novel, simple, and highly sensitive analytical procedure for the quantitative evaluation of oxygenated and nitrated polycyclic aromatic hydrocarbons in volcanic ash samples based on dispersive solid–liquid microextraction (DSLME) coupled to ultra high-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS) was developed. Diverse chemometric tools were applied to optimize DSLME working conditions. Thus, a linear calibration curve for all the target analytes in the concentration range from 0.01 to 100 μg g−1 (r2 > 0.994) was obtained. The limits of detection for all the compounds were between 14.6 and 56.0 pg g−1, with high reproducibility (relative standard deviation (RSD) was below 8.1% for all the analytes). Additionally, recoveries ranged from 94.2 to 100%. The applicability of the method was evaluated and the feasibility of the existence of nitrated and oxygenated-PAHs in volcanic ashes at ultra-trace levels was demonstrated, which reveals an unknown source of distribution of these pollutants to the environment.