【摘要】 自1997年12月~1998年7月,在覆盖整个青岛市区布设了6个采样点,用2,4-二硝基苯肼HPLC法测定了11种醛酮类羰基化合物在不同季节、不同时间的浓度.青岛市大气中甲醛、乙醛、丙酮及醛酮总量的平均浓度冬季分别为3.64,4.18,2.50,13.9mg/m3,夏季分别为9.95, 7.00,5.75,26.9mg/m3,夏季的浓度明显高于冬季,青岛市大气中甲醛占总羰基化合物的26.2%~37%,乙醛、丙酮分别占总羰基化合物的26.0%~30.1%和18.0%~21.4%.甲醛+乙醛+丙酮之和占总羰基化合物的74.3%~84.3%,甲醛和乙醛在冬、夏两季的相关性较差(R2=0.43),而乙醛和丙酮在夏季具有较强的相关性(R2=0.7399).更多还原

【Abstract】 Air samples were collected at six urban sites in Qingdao during December 1997~July 1998. The concentrations of 11 carbonyl compounds of aldehydes and ketones were determined in different season and time. The average concentrations of formaldehyde, acetaldehyde, acetone and the total carbonyls were 3.64, 4.18, 2.50 and 13.9mg/m3 in winter and 9.95, 7.00, 5.75 and 26.9mg/m3 in summer, respectively, showing markedly higher in summer than in winter. Formaldehyde in the urban atmosphere accounted for 26.2%~37% of the total carbonyl compound concentrations; acetaldehyde and acetone accounted for 26.0%~30.1% and 18.0%~21.4%, respectively and the sum of formaldehyde, acetaldehyde and acetone accounted for 74.3%~84.3%. Relativity of formaldehyde to acetaldehyde was weaker in winter and summer (R2=0.43), while that of acetaldehyde to acetone was stronger in summer (R2=0.7399).更多还原