Character of carbonyl compounds and their source in Guangzhou Wanqingsha atmosphere

Carbonyl compounds were measured in Wanqingsha, Guangzhou. The measurements were based on the rapid reaction of carbonyl compounds with 2, 4-dinitrophenylhydrazine (DNPH), and their derivatives were detected by HPLC. 12 carbonyls were detected in samples. Acetone was the most abundant carbonyl, followed by formaldehyde, acetaldehyde and propionaldehyde. Con-centrations of these four carbonyls were 22.07, 9.99, 7.80 and 1.20 μg·m-3, respectively. Concentrations of carbonyl in daytime were higher than that at night. Concentrations rations of formaldehyde/acetaldehyde and acetaldehyde/propionaldehyde showed that an-thropogenic sources were the main sources. Pearson correlations for formaldehyde, acetaldehyde, propionaldehyde and butyralde-hyde showed they had similar sources. Wanqingsha was in the downwind of Guangzhou, the pollutants in urban atmosphere can transport to Wanqingsha.