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Measurement of phase-distributed nitrophenols in Rome ambient air
Angelo Cecinato1, Vincenzo Di Palo, Donatella Pomata
1Istituto sull'Inquinamento Atmosferico CNR, Via Salaria Km 29.300, CP 10, I-00016 Monterotondo Scalo RM, Italy. cecinato@iia.cnr.it
Abstract:
Atmospheric nitrophenols (NPs) were determined both in the gas and particle phases by combining the annular denuder sampling technique with GC-MS analysis. The phase distribution of six mono-NPs identified in air sampled in downtown Rome was assessed. 4-NP, 3-methyl-4-NP and 2,6-dimethyl-4-NP were found for more than 75% in the particle phase, whilst 2-NP, 4-methyl-2-NP and 5-methyl-2-NP predominated in the gas phase. Concentration levels lower than 20 ng m-3 were observed for all NPs, among which 4-NP (17.8+/-5.6 ng m-3) and 2-NP (10.4+/-4.2 ng m-3) were the most abundant congeners in the two phases, respectively.
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