Levoglucosan, a tracer for the assessment of the biomass burning contribution to atmospheric particulate matter (PM) concentrations, was determined by means of high-performance anion-exchange chromatography (HPAEC) with pulsed amperometric detection (PAD). In this work we propose a modification in the instrumental set-up aiming at an improvement in the detector response by adding NaOH after chromatographic separation to increase the pH. The comparison between this technique and the gas chromatography/mass spectrometry (GC/MS) method commonly used showed good agreement. Repeatability is 4.8% RSD, limits of detection for pevoglucosan, mannosan and galactosan are in the range 0.001-0.002 µg mL-1 in solution, corresponding to 3-4 ng m-3 for 24 m3 of air sampled. PM10 samples were characterised for levoglucosan and for organic and elemental carbon contents. The preliminary results reported here for five sites in the Lombardy region (Northern Italy) are, as far as we know, the first data on levoglucosan contribution to OC in Italy. The levoglucosan concentrations observed in Lombardy vary in the range 173-963 ng m-3 with an average levoglucosan-C to OC ratio ranging from 1.5% to 2.5%.
A simplified method for levoglucosan quantification in wintertime atmospheric particulate matter by high performance anion-exchange chromatography coupled with pulsed amperometric detection / A. Piazzalunga, P. Fermo, R. Vecchi, G. Valli, V. Bernardoni, M. A. De Gregorio. - In: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY. - ISSN 0306-7319. - 90:12(2010), pp. 934-947.
|Titolo:||A simplified method for levoglucosan quantification in wintertime atmospheric particulate matter by high performance anion-exchange chromatography coupled with pulsed amperometric detection|
FERMO, PAOLA (Secondo)
BERNARDONI, VERA (Penultimo)
|Parole Chiave:||Atmospheric aerosol ; levoglucosan ; HPAEC-PAD ; anhydrosugars ; biomass burning|
|Settore Scientifico Disciplinare:||Settore CHIM/01 - Chimica Analitica|
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
|Data di pubblicazione:||2010|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1080/03067310903023619|
|Appare nelle tipologie:||01 - Articolo su periodico|