Oxygented and nitrated PAHs in the atmosphere of Buenos Aires. Determination by UHPLC(+)APCI-MS/MS

FABIANA FUJIWARA; GOMEZ DARIO; MARIA GUIÑEZ; SMICHOWSKI PATRICIA; SOLEDAD CERUTTI

PISA

Congreso; COLLOQUIUM SPECTROSCOPICUM INTERNATIONALE XL; 2017

Colloquium Spectroscopium Internationale

Oxygenated and nitrated polycyclic aromatic hydrocarbons (OPAHs and NPAHs) were determined in PM2.5, PM10, and tree barks samples collected in Buenos Aires, Argentina. Different strategies were followed for the collectionof fine and coarse fractions including type of filters and samplers. Samples of PM2.5 were collected on glass fiber filters with a medium volume sampler while for PM10 glass and quartz fiber filters high volume sampler were used. For PAHs derivatives quantification ultra high performance liquid chromatography-atmospheric pressure chemical ionization tandem mass spectrometry (UHPLC-APCI-MS/MS) was used. Data acquisition under MS/MS was achieved by applying multiple reaction monitoring to provide a high degree of sensitivity and specificity. The chromatographic separation was carried out on a reverse phase rapid resolution column using a gradient mode. In APM, four PAHs derivatives were detected at concentrations ranging from 0.01 to 240.62 ng m-3.