Volcanic ashes as a source for nitrated and oxygenated polycyclic aromatic hydrocarbon pollution

GUIÑEZ, MARÍA; ESCUDERO, LUIS; MANDELLI, ALEJANDRO; MARTINEZ, LUIS D.; CERUTTI, SOLEDAD

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

SPRINGER HEIDELBERG

Año: 2020 vol. 27 p. 16972 - 16982

0944-1344

In this study, a novel, simple, and highly sensitive analytical procedure for the quantitative evaluation of oxygenated and nitratedpolycyclic aromatic hydrocarbons in volcanic ash samples based on dispersive solid?liquid microextraction (DSLME) coupled toultra 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 werebetween 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 theexistence 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