FORMALDEHYDE AND OTHER CARBONYLS IN LOS-ANGELES AMBIENT AIR
FORMALDEHYDE AND OTHER CARBONYLS IN LOS-ANGELES AMBIENT AIR
复制标题
DOI：
10.1021/es00099a005
复制
发表时间：
1982-01-01
影响因子：
11.4
通讯作者：
GROSJEAN, D
中科院分区：
文献类型：
--
作者：
GROSJEAN, D
通过选择性采样和高效液相色谱分析，洛杉矶地区在严重的光化学污染期间测量了环境中2，4-二硝基苯肼等羰基化合物的水平。给出了以下6种羰基化合物的气相浓度和日分布：甲醛(高达48 ppb)，乙醛(1toreq)。35 ppb)、丙醛(.14 ppb)，丁醛(.7 ppb)，2-丁酮(.14 ppb)和苯甲醛(.1 ppb)。此外，还介绍了5种羰基化合物的颗粒相浓度和颗粒/气体分配比。讨论了环境中的羰基水平与人为排放、光化学生产和污染空气中的去除有关的问题。讨论了该方法的优点和目前的局限性。
From selective sampling and liquid chromatography analysis, ambient levels of carbonyl compounds as 2,4-dinitrophenylhydrazones were measured in the Los Angeles area during severe photochemical pollution episodes. Gas-phase concentrations and diurnal profiles were presented for the following 6 carbonyls: formaldehyde (up to 48 ppb), acetaldehyde (.ltoreq. 35 ppb), propanal (.ltoreq. 14 ppb), butanal (.ltoreq. 7 ppb), 2-butanone (.ltoreq. 14 ppb) and benzaldehyde (.ltoreq. 1 ppb). Also presented were particulate-phase concentrations and particle/gas distribution ratios for 5 carbonyls. Ambient carbonyl levels were discussed with respect to anthropogenic emissions and to photochemical production and removal in polluted air. Advantages and current limitations of the method were discussed.