DOI: 10.1002/2015GL066954
论文题名: Size separation method for absorption characterization in brown carbon: Application to an aged biomass burning sample
作者: Di Lorenzo R.A. ; Young C.J.
刊名: Geophysical Research Letters
ISSN: 0094-9498
EISSN: 1944-9229
出版年: 2016
卷: 43, 期: 1 起始页码: 458
结束页码: 465
语种: 英语
英文关键词: aerosol
; biomass burning
; brown carbon
; electrospray ionization
; size exclusion chromatography
Scopus关键词: Aerosols
; Atmospheric aerosols
; Biomass
; Chromatographic analysis
; Chromatography
; Electrospray ionization
; High performance liquid chromatography
; Ionization
; Liquid chromatography
; Mass spectrometry
; Molecular weight
; Molecules
; Size separation
; Biomass-burning
; Brown carbons
; Chromatographic methods
; Electrospray ionization mass spectrometry
; Reverse phase high performance liquid chromatography
; Separation methods
; Small molecules
; UV-vis absorbance
; Size exclusion chromatography
英文摘要: The majority of brown carbon (BrC) in atmospheric aerosols is derived from biomass burning (BB) and is primarily composed of extremely low volatility organic carbons. We use two chromatographic methods to compare the contribution of large and small light-absorbing BrC components in aged BB aerosols with UV-vis absorbance detection: (1) size exclusion chromatography (SEC) and (2) reverse phase high-performance liquid chromatography. We observe no evidence of small molecule absorbers. Most BrC absorption arises from large molecular weight components (>1000 amu). This suggests that although small molecules may contribute to BrC absorption near the BB source, analyses of aerosol extracts should use methods selective to large molecular weight compounds because these species may be responsible for long-term BrC absorption. Further characterization with electrospray ionization mass spectrometry (MS) coupled to SEC demonstrates an underestimation of the molecular size determined through MS as compared to SEC. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956580021&doi=10.1002%2f2015GL066954&partnerID=40&md5=245091aa6800cfab7732571ac937312c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10461
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, Canada
Recommended Citation:
Di Lorenzo R.A.,Young C.J.. Size separation method for absorption characterization in brown carbon: Application to an aged biomass burning sample[J]. Geophysical Research Letters,2016-01-01,43(1).