Abstract
A method for the analysis of hydroxy-substituted polynuclear aromatic hydrocarbons (hydroxy-PAHs), using gas chromatography with electron-capture (ECD) and mass spectrometric (MS) detectors, is described. Pentafluorobenzyl bromide (PFBBr) was used as derivatizing agent for the hydroxy-PAHs. Optimization of the derivatization conditions was performed, and electron impact and negative ion chemical ionization mass spectra were studied. Detection limits ranged 0.01 to 3.3 pg in ECD and negative ion chemical ionization mode (NICI)-SIM-MS values that allowed the determination of these compounds in environmental samples. Samples of air particulate matter were collected for the analysis of hydroxy-PAHs. The concentrations found for 5-hydroxyindol, 2-nitro-1-naphtho, 2-hydroxy-1,4-napthoquinone and 2-hydroxy-9-fluorenone ranged between 5 and 189 pg/m 3.
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