Changes in Aerosol Chemistry From 2014 to 2016 in Winter in Beijing: Insights From High‐Resolution Aerosol Mass Spectrometry

2019 ◽  
Vol 124 (2) ◽  
pp. 1132-1147 ◽  
Author(s):  
Weiqi Xu ◽  
Yele Sun ◽  
Qingqing Wang ◽  
Jian Zhao ◽  
Junfeng Wang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Aerosol Chemistry ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

Identification of amines in wintertime ambient particulate material using high resolution aerosol mass spectrometry

2018 ◽  
Vol 180 ◽  
pp. 173-183 ◽  
Author(s):  
Courtney L.H. Bottenus ◽  
Paola Massoli ◽  
Donna Sueper ◽  
Manjula R. Canagaratna ◽  
Graham VanderSchelden ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Particulate Material ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry

2013 ◽  
Vol 47 (6) ◽  
pp. 2645-2653 ◽  
Author(s):  
Liqing Hao ◽  
Sami Romakkaniemi ◽  
Aki Kortelainen ◽  
Antti Jaatinen ◽  
Harri Portin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Chemical Composition ◽  
High Resolution ◽  
Time Of Flight ◽  
Resolution Time ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry ◽  
Aerosol Chemical Composition

Evaluating the Mixing of Organic Aerosol Components Using High-Resolution Aerosol Mass Spectrometry

2011 ◽  
Vol 45 (15) ◽  
pp. 6329-6335 ◽  
Author(s):  
Lea Hildebrandt ◽  
Kaytlin M. Henry ◽  
Jesse H. Kroll ◽  
Douglas R. Worsnop ◽  
Spyros N. Pandis ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Organic Aerosol ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

scholarly journals Seasonal analysis of submicron aerosol in Old Delhi using high-resolution aerosol mass spectrometry: chemical characterisation, source apportionment and new marker identification

2021 ◽  
Vol 21 (13) ◽  
pp. 10133-10158
Author(s):  
James M. Cash ◽  
Ben Langford ◽  
Chiara Di Marco ◽  
Neil J. Mullinger ◽  
James Allan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Mass Fraction ◽  
Crop Residue ◽  
Monsoon Period ◽  
Post Monsoon ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry ◽  
Crop Residue Burning ◽  
Waste Burning

Abstract. We present the first real-time composition of submicron particulate matter (PM1) in Old Delhi using high-resolution aerosol mass spectrometry (HR-AMS). Old Delhi is one of the most polluted locations in the world, and PM1 concentrations reached ∼ 750 µg m−3 during the most polluted period, the post-monsoon period, where PM1 increased by 188 % over the pre-monsoon period. Sulfate contributes the largest inorganic PM1 mass fraction during the pre-monsoon (24 %) and monsoon (24 %) periods, with nitrate contributing most during the post-monsoon period (8 %). The organics dominate the mass fraction (54 %–68 %) throughout the three periods, and, using positive matrix factorisation (PMF) to perform source apportionment analysis of organic mass, two burning-related factors were found to contribute the most (35 %) to the post-monsoon increase. The first PMF factor, semi-volatility biomass burning organic aerosol (SVBBOA), shows a high correlation with Earth observation fire counts in surrounding states, which links its origin to crop residue burning. The second is a solid fuel OA (SFOA) factor with links to local open burning due to its high composition of polyaromatic hydrocarbons (PAHs) and novel AMS-measured marker species for polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). Two traffic factors were resolved: one hydrocarbon-like OA (HOA) factor and another nitrogen-rich HOA (NHOA) factor. The N compounds within NHOA were mainly nitrile species which have not previously been identified within AMS measurements. Their PAH composition suggests that NHOA is linked to diesel and HOA to compressed natural gas and petrol. These factors combined make the largest relative contribution to primary PM1 mass during the pre-monsoon and monsoon periods while contributing the second highest in the post-monsoon period. A cooking OA (COA) factor shows strong links to the secondary factor, semi-volatility oxygenated OA (SVOOA). Correlations with co-located volatile organic compound (VOC) measurements and AMS-measured organic nitrogen oxides (OrgNO) suggest SVOOA is formed from aged COA. It is also found that a significant increase in chloride concentrations (522 %) from pre-monsoon to post-monsoon correlates well with SVBBOA and SFOA, suggesting that crop residue burning and open waste burning are responsible. A reduction in traffic emissions would effectively reduce concentrations across most of the year. In order to reduce the post-monsoon peak, sources such as funeral pyres, solid waste burning and crop residue burning should be considered when developing new air quality policy.

scholarly journals New Methodology for Quantifying Polycyclic Aromatic Hydrocarbons (PAHs) Using High-Resolution Aerosol Mass Spectrometry

2015 ◽  
Vol 49 (11) ◽  
pp. 1131-1148 ◽  
Author(s):  
Courtney L. Herring ◽  
Celia L. Faiola ◽  
Paola Massoli ◽  
Donna Sueper ◽  
Matthew H. Erickson ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Polycyclic Aromatic Hydrocarbons ◽  
High Resolution ◽  
Aromatic Hydrocarbons ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry ◽  
Polycyclic Aromatic

O/C and OM/OC Ratios of Primary, Secondary, and Ambient Organic Aerosols with High-Resolution Time-of-Flight Aerosol Mass Spectrometry

2008 ◽  
Vol 42 (12) ◽  
pp. 4478-4485 ◽  
Author(s):  
Allison C. Aiken ◽  
Peter F. DeCarlo ◽  
Jesse H. Kroll ◽  
Douglas R. Worsnop ◽  
J. Alex Huffman ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Time Of Flight ◽  
Organic Aerosols ◽  
Resolution Time ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

scholarly journals Evaluating the degree of oxygenation of organic aerosol during foggy and hazy days in Hong Kong using high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS)

2013 ◽  
Vol 13 (2) ◽  
pp. 3533-3573 ◽  
Author(s):  
Y. J. Li ◽  
B. Y. L. Lee ◽  
J. Z. Yu ◽  
N. L. Ng ◽  
C. K. Chan
Keyword(s):  
Mass Spectrometry ◽  
Hong Kong ◽  
High Resolution ◽  
Time Of Flight ◽  
Organic Aerosol ◽  
Present Observation ◽  
Particle Phase ◽  
Resolution Time ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

Abstract. The chemical characteristics of organic aerosol (OA) are still poorly constrained. Here we present observation results of the degree of oxygenation of OA based on high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS) measurements made at a coastal site in Hong Kong from late April to the end of May in 2011. Two foggy periods and one hazy period were chosen for detailed analysis to compare the changes in the degree of oxygenation of OA due to different processes. The Extended Aerosol Inorganic Model (E-AIM) predicted a fine particle liquid water content (LWCfp) up to 85 μg m−3 during the foggy days. Particle concentration as measured by HR-ToF-AMS was up to 60 μg m−3 during the hazy days and up to 30 μg m−3 during the foggy days. The degree of oxygenation of OA, as indicated by several parameters including the fraction of m/z 44 in organic mass spectra (f44), the elemental ratio of oxygen to carbon (O : C), and the carbon oxidation state (OSc), was evaluated against the odd oxygen (Ox) concentration, LWCfp, ionic strength (IS), and in-situ pH (pHis). Results suggest that the high concentration of OA (on average 11 μg m−3) and the high degree of oxygenation (f44 = 0.15, O : C = 0.51, and OSc = −0.31) during the hazy period were mainly due to gas-phase oxidation. During the foggy periods with low photochemical activities, the degree of oxygenation of OA was almost as high as that on the hazy days and significantly higher than that during non-foggy/non-hazy days. However, the OA evolved quite differently in the two foggy periods. The first foggy period in late April saw a larger LWCfp and a lower Ox concentration and the OA was made up of ~ 20% semi-volatile oxygenated organic aerosol (SVOOA) as resolved by positive matrix factorization (PMF). In the second foggy period in mid-May, higher Ox concentration and lower LWCfp were observed, and the OA was found to contain >50% low-volatility oxygenated organic aerosols (LVOOA). An examination of the particle-phase constituents suggests that partitioning may have been the dominating process through which oxygenated species were incorporated into the particle phase during the first foggy period, while oxidation in the aqueous phase may have been the dominating process during the second foggy period. Both physical and chemical processes were found to be important for oxygenated OA formation.

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