کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8864743 | 1620478 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular composition and seasonal variation of amino acids in urban aerosols from Beijing, China
ترجمه فارسی عنوان
ترکیب مولکولی و تنوع فصلی آمینو اسیدها در پریزهای شهری از پکن، چین
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
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 mâ 3 with a peak in spring (13.7 nmol mâ 3), followed by winter (11.5 nmol mâ 3), fall (9.51 nmol mâ 3) and summer (7.45 nmol mâ 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 203, 1 May 2018, Pages 28-35
Journal: Atmospheric Research - Volume 203, 1 May 2018, Pages 28-35
نویسندگان
Lujie Ren, Huahua Bai, Xi Yu, Fengchang Wu, Siyao Yue, Hong Ren, Linjie Li, Senchao Lai, Yele Sun, Zifa Wang, Pingqing Fu,