Concentration of Peroxides and Formaldehyde in Air and Rain and Gas-Rain Partitioning |
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| Authors: | O Largiuni M C Giacomelli G Piccardi |
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| Institution: | (1) Department of Chemistry, University of Florence, via G. Capponi 9, 50121 Florence, Italy |
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| Abstract: | Rain and air of Florence have been collected in a continuous way andanalysed by flow analysis spectrofluorimetric methods for formaldehydeand hydrogen peroxide. Diurnal and seasonal variations were observed;the mean/maximum concentrations of all data (as  gm–3) are 3.3/23.4 for HCHO and 0.4/4.93 forH2O2. The effect of external sources and ofphotochemical reactions produces periods of positive and negativecorrelations for these compounds. The mean/maximum rain concentration ofall data are 98/443 g l–1 for HCHO and 84/685 g l–1 for H2O2. Concentrationratios rain/air and discrepancies to Henry's Law equilibrium arediscussed. |
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| Keywords: | hydrogen peroxide formaldehyde organic peroxides air samples rain samples flow analysis fluorimetry Henry's Law |
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