氨基酸
缬氨酸
衍生化
蛋氨酸
北京
化学
丙氨酸
季节性
高效液相色谱法
环境化学
甘氨酸
脯氨酸
色谱法
生物
生物化学
生态学
中国
法学
政治学
作者
Lujie Ren,Huahua Bai,Yu Xi,Fengchang Wu,Siyao Yue,Hong Ren,Linjie Li,Senchao Lai,Yele Sun,Zifa Wang,Pingqing Fu
标识
DOI:10.1016/j.atmosres.2017.11.032
摘要
Fifteen hydrolyzed amino acids (THAA) were quantified in urban aerosols (TSP samples) collected during April 2012 to May 2013 in Beijing, China using high-performance liquid chromatography (HPLC) after their derivatization with o-phthalaldehyde (OPA), to investigate their molecular distributions and seasonal variation. Total concentrations of amino acids ranged from 1.73–25.7 nmol m− 3 with a peak in spring (13.7 nmol m− 3), followed by winter (11.5 nmol m− 3), fall (9.51 nmol m− 3) and summer (7.45 nmol m− 3). Glycine (Gly), alanine (Ala) and valine (Val) are found to be the most abundant species, which account for 46% of the total THAA. Compared with those recorded in previous studies, the atmospheric levels of amino acids in Beijing were higher than those from other regions. Enhanced amounts of methionine, tyrosine, histidine, aspartic acid and glutamic acid were found during the rainfall events. The factor analysis further suggests that amino acids in urban Beijing originated from multiple sources including biological emission, biomass burning, as well as anthropogenic activities.
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