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Journal articles on the topic 'HR-ToF-AMS'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Qi, Lu, Mindong Chen, Giulia Stefenelli, et al. "Organic aerosol source apportionment in Zurich using an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF-MS) – Part 2: Biomass burning influences in winter." Atmospheric Chemistry and Physics 19, no. 12 (2019): 8037–62. http://dx.doi.org/10.5194/acp-19-8037-2019.

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Abstract. Real-time, in situ molecular composition measurements of the organic fraction of fine particulate matter (PM2.5) remain challenging, hindering a full understanding of the climate impacts and health effects of PM2.5. In particular, the thermal decomposition and ionization-induced fragmentation affecting current techniques has limited a detailed investigation of secondary organic aerosol (SOA), which typically dominates OA. Here we deploy a novel extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF-MS) during winter 2017 in downtown Zurich, Switzerland, which o

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2

Stefenelli, Giulia, Veronika Pospisilova, Felipe D. Lopez-Hilfiker, et al. "Organic aerosol source apportionment in Zurich using an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF-MS) – Part 1: Biogenic influences and day–night chemistry in summer." Atmospheric Chemistry and Physics 19, no. 23 (2019): 14825–48. http://dx.doi.org/10.5194/acp-19-14825-2019.

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Abstract. Improving the understanding of the health and climate impacts of aerosols remains challenging and is restricted by the limitations of current measurement techniques. Detailed investigation of secondary organic aerosol (SOA), which is typically the dominating fraction of the organic aerosol (OA), requires instrumentation capable of real-time, in situ measurements of molecular composition. In this study, we present the first ambient measurements by a novel extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF-MS). The EESI-TOF-MS was deployed along with a high-r

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3

Lee, Berto P., Yong Jie Li, Richard C. Flagan, Charles Lo, and Chak K. Chan. "Sizing Characterization of the Fast-Mobility Particle Sizer (FMPS) Against SMPS and HR-ToF-AMS." Aerosol Science and Technology 47, no. 9 (2013): 1030–37. http://dx.doi.org/10.1080/02786826.2013.810809.

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4

Bhattu, Deepika, S. N. Tripathi, and Abhishek Chakraborty. "Deriving aerosol hygroscopic mixing state from size-resolved CCN activity and HR-ToF-AMS measurements." Atmospheric Environment 142 (October 2016): 57–70. http://dx.doi.org/10.1016/j.atmosenv.2016.07.032.

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5

Rollins, A. W., J. L. Fry, J. F. Hunter, et al. "Elemental analysis of aerosol organic nitrates with electron ionization high-resolution mass spectrometry." Atmospheric Measurement Techniques 3, no. 1 (2010): 301–10. http://dx.doi.org/10.5194/amt-3-301-2010.

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Abstract. Four hydroxynitrates (R(OH)R'ONO2) representative of atmospheric volatile organic compound (VOC) oxidation products were synthesized, nebulized and sampled into an Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS). The resulting mass spectrum was used to evaluate calibration factors for elemental analysis of organic nitrates by AMS, and to determine the distribution of nitrogen in the detected fragments in a search for an AMS signature of organic nitrates. We found that 30% of the detected nitrogen mass is in the NO+ and NO2+ fragments, 12% at NHx+ fragme

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6

Rollins, A. W., J. L. Fry, J. F. Hunter, et al. "Elemental analysis of aerosol organic nitrates with electron ionization high-resolution mass spectrometry." Atmospheric Measurement Techniques Discussions 2, no. 5 (2009): 2781–807. http://dx.doi.org/10.5194/amtd-2-2781-2009.

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Abstract. Four hydroxynitrates (R(OH)R'ONO2) representative of atmospheric volatile organic compound (VOC) oxidation products were synthesized, nebulized and sampled into an Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS). The resulting mass spectrum was used to evaluate calibration factors for elemental analysis of organic nitrates by AMS, and to determine the distribution of nitrogen in the detected fragments in a search for an AMS signature of organic nitrates. We find that 30% of the detected nitrogen mass is in the NO+ and NO2+ fragments, 12% at NHx+ fragmen

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7

Xu, L., S. Suresh, H. Guo, R. J. Weber, and N. L. Ng. "Aerosol characterization over the southeastern United States using high resolution aerosol mass spectrometry: spatial and seasonal variation of aerosol composition, sources, and organic nitrates." Atmospheric Chemistry and Physics Discussions 15, no. 7 (2015): 10479–552. http://dx.doi.org/10.5194/acpd-15-10479-2015.

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Abstract. We deployed a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) and an Aerosol Chemical Speciation Monitor (ACSM) to characterize the chemical composition of submicron non-refractory particles (NR-PM1) in the southeastern US. Measurements were performed in both rural and urban sites in the greater Atlanta area, GA and Centreville, AL for approximately one year, as part of Southeastern Center of Air Pollution and Epidemiology study (SCAPE) and Southern Oxidant and Aerosol Study (SOAS). Organic aerosol (OA) accounts for more than half of NR1 mass concentration regar

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8

Xu, L., S. Suresh, H. Guo, R. J. Weber, and N. L. Ng. "Aerosol characterization over the southeastern United States using high-resolution aerosol mass spectrometry: spatial and seasonal variation of aerosol composition and sources with a focus on organic nitrates." Atmospheric Chemistry and Physics 15, no. 13 (2015): 7307–36. http://dx.doi.org/10.5194/acp-15-7307-2015.

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Abstract. We deployed a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) and an Aerosol Chemical Speciation Monitor (ACSM) to characterize the chemical composition of submicron non-refractory particulate matter (NR-PM$_{1}$) in the southeastern USA. Measurements were performed in both rural and urban sites in the greater Atlanta area, Georgia (GA), and Centreville, Alabama (AL), for approximately 1 year as part of Southeastern Center for Air Pollution and Epidemiology study (SCAPE) and Southern Oxidant and Aerosol Study (SOAS). Organic aerosol (OA) accounts for more than h

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9

Ma, Mutian, Laura-Hélèna Rivellini, YuXi Cui, et al. "Elemental analysis of oxygenated organic coating on black carbon particles using a soot-particle aerosol mass spectrometer." Atmospheric Measurement Techniques 14, no. 4 (2021): 2799–812. http://dx.doi.org/10.5194/amt-14-2799-2021.

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Abstract. Chemical characterization of organic coatings is important to advance our understanding of the physio-chemical properties and environmental fate of black carbon (BC) particles. The soot-particle aerosol mass spectrometer (SP-AMS) has been utilized for this purpose in recent field studies. The laser vaporization (LV) scheme of the SP-AMS can heat BC cores gradually until they are completely vaporized, during which organic coatings can be vaporized at temperatures lower than that of the thermal vaporizer (TV) used in a standard high-resolution time-of-flight aerosol mass spectrometer (

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10

Jensen, Louise N., Manjula R. Canagaratna, Kasper Kristensen та ін. "Temperature and volatile organic compound concentrations as controlling factors for chemical composition of <i>α</i>-pinene-derived secondary organic aerosol". Atmospheric Chemistry and Physics 21, № 15 (2021): 11545–62. http://dx.doi.org/10.5194/acp-21-11545-2021.

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Abstract. This work investigates the individual and combined effects of temperature and volatile organic compound precursor concentrations on the chemical composition of particles formed in the dark ozonolysis of α-pinene. All experiments were conducted in a 5 m3 Teflon chamber at an initial ozone concentration of 100 ppb and initial α-pinene concentrations of 10 and 50 ppb, respectively; at constant temperatures of 20, 0, or −15 ∘C; and at changing temperatures (ramps) from −15 to 20 and from 20 to −15 ∘C. The chemical composition of the particles was probed using a high-resolution time-of-fl

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11

Yeung, Ming Chee, Berto P. Lee, Yong Jie Li, and Chak K. Chan. "Simultaneous HTDMA and HR-ToF-AMS measurements at the HKUST Supersite in Hong Kong in 2011." Journal of Geophysical Research: Atmospheres 119, no. 16 (2014): 9864–83. http://dx.doi.org/10.1002/2013jd021146.

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12

He, L. Y., Y. Lin, X. F. Huang, et al. "Characterization of high-resolution aerosol mass spectra of primary organic aerosol emissions from Chinese cooking and biomass burning." Atmospheric Chemistry and Physics Discussions 10, no. 9 (2010): 21237–57. http://dx.doi.org/10.5194/acpd-10-21237-2010.

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Abstract. Aerosol Mass Spectrometer (AMS) has proved to be a powerful tool to measure submicron particulate composition with high time resolution. Factor analysis of mass spectra (MS) collected worldwide by AMS demonstrates that submicron organic aerosol (OA) is usually composed of several major components, such as oxygenated (OOA), hydrocarbon-like (HOA), biomass burning (BBOA), and other primary OA. In order to help interpretation of component MS from factor analysis of ambient OA datasets, AMS measurement of different primary sources is required for comparison. Such work, however, has been

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13

Li, Y. J., B. Y. L. Lee, J. Z. Yu, N. L. Ng, and C. K. Chan. "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)." Atmospheric Chemistry and Physics 13, no. 17 (2013): 8739–53. http://dx.doi.org/10.5194/acp-13-8739-2013.

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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. Using HR-ToF-AMS measured inorganic species as input, the Extended Aerosol Inorganic Model (E-AIM) predicte

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14

He, L. Y., Y. Lin, X. F. Huang, et al. "Characterization of high-resolution aerosol mass spectra of primary organic aerosol emissions from Chinese cooking and biomass burning." Atmospheric Chemistry and Physics 10, no. 23 (2010): 11535–43. http://dx.doi.org/10.5194/acp-10-11535-2010.

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Abstract. Aerosol mass spectrometry has proved to be a powerful tool to measure submicron particulate composition with high time resolution. Factor analysis of mass spectra (MS) collected worldwide by aerosol mass spectrometer (AMS) demonstrates that submicron organic aerosol (OA) is usually composed of several major components, such as oxygenated (OOA), hydrocarbon-like (HOA), biomass burning (BBOA), and other primary OA. In order to help interpretation of component MS from factor analysis of ambient OA datasets, AMS measurements of different primary sources is required for comparison. Such w

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15

Aljawhary, D., A. K. Y. Lee, and J. P. D. Abbatt. "High-resolution chemical ionization mass spectrometry (ToF-CIMS): application to study SOA composition and processing." Atmospheric Measurement Techniques 6, no. 11 (2013): 3211–24. http://dx.doi.org/10.5194/amt-6-3211-2013.

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Abstract. This paper demonstrates the capabilities of chemical ionization mass spectrometry (CIMS) to study secondary organic aerosol (SOA) composition with a high-resolution (HR) time-of-flight mass analyzer (aerosol-ToF-CIMS). In particular, by studying aqueous oxidation of water-soluble organic compounds (WSOC) extracted from α-pinene ozonolysis SOA, we assess the capabilities of three common CIMS reagent ions: (a) protonated water clusters (H2O)nH+, (b) acetate CH3C(O)O− and (c) iodide water clusters I(H2O)n− to monitor SOA composition. Furthermore, we report the relative sensitivity of th

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16

DeCarlo, P. F., E. J. Dunlea, J. R. Kimmel, et al. "Fast airborne aerosol size and chemistry measurements with the high resolution aerosol mass spectrometer during the MILAGRO Campaign." Atmospheric Chemistry and Physics Discussions 7, no. 6 (2007): 18269–317. http://dx.doi.org/10.5194/acpd-7-18269-2007.

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Abstract. The concentration, size, and composition of non-refractory submicron aerosol (NR-PM1) was measured over Mexico City and central Mexico with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) onboard the NSF/NCAR C-130 aircraft as part of the MILAGRO field campaign. This was the first aircraft deployment of the HR-ToF-AMS, in which the instrument performed very well, and provided 12 s data. The aerosol mass from the AMS correlates strongly with other aerosol measurements on board the aircraft. Organic aerosol (OA) species dominate the NR-PM1 mass. OA correlates st

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17

Dall'Osto, M., J. Ovadnevaite, D. Ceburnis, et al. "Characterization of urban aerosol in Cork City (Ireland) using aerosol mass spectrometry." Atmospheric Chemistry and Physics Discussions 12, no. 11 (2012): 29657–704. http://dx.doi.org/10.5194/acpd-12-29657-2012.

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Abstract. Ambient wintertime background urban aerosol in Cork City, Ireland, was characterized using aerosol mass spectrometry. During the three-week measurement study in 2009, 93% of the 1 200 000 single particles characterized by an Aerosol Time-Of-Flight Mass Spectrometer (TSI ATOFMS) were classified into five organic-rich particle types, internally-mixed to different proportions with Elemental Carbon (EC), sulphate and nitrate while the remaining 7% was predominantly inorganic in nature. Non-refractory PM1 aerosol was also characterized using a High Resolution Time-Of-Flight Aerodyne Aeros

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18

DeCarlo, P. F., E. J. Dunlea, J. R. Kimmel, et al. "Fast airborne aerosol size and chemistry measurements above Mexico City and Central Mexico during the MILAGRO campaign." Atmospheric Chemistry and Physics 8, no. 14 (2008): 4027–48. http://dx.doi.org/10.5194/acp-8-4027-2008.

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Abstract. The concentration, size, and composition of non-refractory submicron aerosol (NR-PM1) was measured over Mexico City and central Mexico with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) onboard the NSF/NCAR C-130 aircraft as part of the MILAGRO field campaign. This was the first aircraft deployment of the HR-ToF-AMS. During the campaign the instrument performed very well, and provided 12 s data. The aerosol mass from the AMS correlates strongly with other aerosol measurements on board the aircraft. Organic aerosol (OA) species dominate the NR-PM1 mass. OA co

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19

Huang, Shan, Laurent Poulain, Dominik van Pinxteren, et al. "Latitudinal and Seasonal Distribution of Particulate MSA over the Atlantic using a Validated Quantification Method with HR-ToF-AMS." Environmental Science & Technology 51, no. 1 (2016): 418–26. http://dx.doi.org/10.1021/acs.est.6b03186.

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20

Zhang, Jie, Sara Lance, Jeffrey M. Freedman, et al. "Detailed Measurements of Submicron Particles from an Independence Day Fireworks Event in Albany, New York Using HR-ToF-AMS." ACS Earth and Space Chemistry 3, no. 8 (2019): 1451–59. http://dx.doi.org/10.1021/acsearthspacechem.9b00046.

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21

Huang, Dan Dan, Yong Jie Li, Berto P. Lee, and Chak K. Chan. "Analysis of Organic Sulfur Compounds in Atmospheric Aerosols at the HKUST Supersite in Hong Kong Using HR-ToF-AMS." Environmental Science & Technology 49, no. 6 (2015): 3672–79. http://dx.doi.org/10.1021/es5056269.

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22

Dunlea, E. J., P. F. DeCarlo, A. C. Aiken, et al. "Evolution of Asian aerosols during transpacific transport in INTEX-B." Atmospheric Chemistry and Physics 9, no. 19 (2009): 7257–87. http://dx.doi.org/10.5194/acp-9-7257-2009.

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Abstract. Measurements of aerosol composition were made with an Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) on board the NSF/NCAR C-130 aircraft as part of the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) field campaign over the Eastern Pacific Ocean. The HR-ToF-AMS measurements of non-refractory submicron aerosol mass are shown to compare well with other aerosol instrumentation in the INTEX-B field study. Two case studies are described for pollution layers transported across the Pacific from the Asian continent, intercepted 3–4 days and 7

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23

Dunlea, E. J., P. F. DeCarlo, A. C. Aiken, et al. "Evolution of Asian aerosols during transpacific transport in INTEX-B." Atmospheric Chemistry and Physics Discussions 8, no. 4 (2008): 15375–461. http://dx.doi.org/10.5194/acpd-8-15375-2008.

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Abstract. Measurements of aerosol composition were made with an Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) on board the NSF/NCAR C-130 aircraft as part of the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) field campaign over the Eastern Pacific Ocean. The HR-ToF-AMS measurements of non-refractory submicron aerosol mass are shown to compare well with other aerosol instrumentation in the INTEX-B field study. Two case studies are described for pollution layers transported across the Pacific from the Asian continent, intercepted 3–4 days and 7

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24

Poulain, L., Z. Wu, M. D. Petters, et al. "Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols – Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols." Atmospheric Chemistry and Physics Discussions 9, no. 4 (2009): 16683–714. http://dx.doi.org/10.5194/acpd-9-16683-2009.

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Abstract. The influence of varying levels of water mixing ratio, r, during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investigated. The reaction proceeded and aerosols were generated in a mixing chamber and the hygroscopic characteristics of the SOA were determined with LACIS (Leipzig Aerosol Cloud Interaction Simulator) and a Cloud Condensation Nuclei counter (CCNc). In parallel, a High-Resolution Time-of-Flight Aerodyne Aerosol Mass Spectrometer (HR-ToF-AMS) located downstream of a thermodenuder (TD) sampling

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25

Poulain, L., Z. Wu, M. D. Petters, et al. "Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols – Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols." Atmospheric Chemistry and Physics 10, no. 8 (2010): 3775–85. http://dx.doi.org/10.5194/acp-10-3775-2010.

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Abstract. The influence of varying levels of water mixing ratio, r, during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investigated. The reaction proceeded and aerosols were generated in a mixing chamber and the hygroscopic characteristics of the SOA were determined with the Leipzig Aerosol Cloud Interaction Simulator (LACIS) and a Cloud Condensation Nuclei counter (CCNc). In parallel, a High-Resolution Time-of-Flight Aerodyne Aerosol Mass Spectrometer (HR-ToF-AMS) located downstream of a thermodenuder (TD) sampl

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26

Dall'Osto, M., J. Ovadnevaite, D. Ceburnis, et al. "Characterization of urban aerosol in Cork city (Ireland) using aerosol mass spectrometry." Atmospheric Chemistry and Physics 13, no. 9 (2013): 4997–5015. http://dx.doi.org/10.5194/acp-13-4997-2013.

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Abstract. Ambient wintertime background urban aerosol in Cork city, Ireland, was characterized using aerosol mass spectrometry. During the three-week measurement study in 2009, 93% of the ca. 1 350 000 single particles characterized by an Aerosol Time-of-Flight Mass Spectrometer (TSI ATOFMS) were classified into five organic-rich particle types, internally mixed to different proportions with elemental carbon (EC), sulphate and nitrate, while the remaining 7% was predominantly inorganic in nature. Non-refractory PM1 aerosol was characterized using a High Resolution Time-of-Flight Aerosol Mass S

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27

Lopez-Hilfiker, F. D., C. Mohr, M. Ehn та ін. "Phase partitioning and volatility of secondary organic aerosol components formed from α-pinene ozonolysis and OH oxidation: the importance of accretion products and other low volatility compounds". Atmospheric Chemistry and Physics Discussions 15, № 4 (2015): 4463–94. http://dx.doi.org/10.5194/acpd-15-4463-2015.

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Abstract. We measured a large suite of gas and particle phase multi-functional organic compounds with a Filter Inlet for Gases and AEROsols (FIGAERO) coupled to a high-resolution time-of-flight chemical ionization mass spectrometer (HR-ToF-CIMS) developed at the University of Washington. The instrument was deployed on environmental simulation chambers to study monoterpene oxidation as a secondary organic aerosol (SOA) source. We focus here on results from experiments utilizing an ionization method most selective towards acids (acetate negative ion proton transfer), but our conclusions are base

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Lopez-Hilfiker, F. D., C. Mohr, M. Ehn та ін. "Phase partitioning and volatility of secondary organic aerosol components formed from α-pinene ozonolysis and OH oxidation: the importance of accretion products and other low volatility compounds". Atmospheric Chemistry and Physics 15, № 14 (2015): 7765–76. http://dx.doi.org/10.5194/acp-15-7765-2015.

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Abstract. We measured a large suite of gas- and particle-phase multi-functional organic compounds with a Filter Inlet for Gases and AEROsols (FIGAERO) coupled to a high-resolution time-of-flight chemical ionization mass spectrometer (HR-ToF-CIMS) developed at the University of Washington. The instrument was deployed on environmental simulation chambers to study monoterpene oxidation as a secondary organic aerosol (SOA) source. We focus here on results from experiments utilizing an ionization method most selective towards acids (acetate negative ion proton transfer), but our conclusions are bas

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29

Paglione, M., S. Saarikoski, S. Carbone, et al. "Primary and secondary biomass burning aerosols determined by proton nuclear magnetic resonance (H-NMR) spectroscopy during the 2008 EUCAARI campaign in the Po Valley (Italy)." Atmospheric Chemistry and Physics Discussions 13, no. 12 (2013): 33343–401. http://dx.doi.org/10.5194/acpd-13-33343-2013.

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Abstract. Atmospheric organic aerosols are generally classified into primary and secondary (POA and SOA) according to their formation processes. An actual separation, however, is challenging when the timescales of emission and of gas-to-particle formation overlap. The presence of SOA formation in biomass burning plumes leads to scientific questions about whether the oxidized fraction of biomass burning aerosol is rather of secondary or primary origin, as some studies would suggest, and about the chemical compositions of oxidized biomass burning POA and SOA. In this study, we apply nuclear magn

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Paglione, M., S. Saarikoski, S. Carbone, et al. "Primary and secondary biomass burning aerosols determined by proton nuclear magnetic resonance (<sup>1</sup>H-NMR) spectroscopy during the 2008 EUCAARI campaign in the Po Valley (Italy)." Atmospheric Chemistry and Physics 14, no. 10 (2014): 5089–110. http://dx.doi.org/10.5194/acp-14-5089-2014.

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Abstract. Atmospheric organic aerosols are generally classified as primary and secondary (POA and SOA) according to their formation processes. An actual separation, however, is challenging when the timescales of emission and gas-to-particle formation overlap. The presence of SOA formation in biomass burning plumes leads to scientific questions about whether the oxidized fraction of biomass burning aerosol is rather of secondary or primary origin, as some studies would suggest, and about the chemical compositions of oxidized biomass burning POA and SOA. In this study, we apply nuclear magnetic

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31

Meng, J. W., M. C. Yeung, Y. J. Li, B. Y. L. Lee, and C. K. Chan. "Cloud condensation nuclei (CCN) and HR-ToF-AMS measurements at a coastal site in Hong Kong: size-resolved CCN activity and closure analysis." Atmospheric Chemistry and Physics Discussions 14, no. 7 (2014): 9067–107. http://dx.doi.org/10.5194/acpd-14-9067-2014.

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Abstract. The cloud condensation nuclei (CCN) properties of atmospheric aerosols were measured on 1–30 May 2011 at a coastal site in Hong Kong. Size-resolved CCN activation curves, the ratio of number concentration of CCN (NCCN) to aerosol concentration (NCN) as a function of particle size, were obtained at supersaturation (SS) = 0.15%, 0.35%, 0.50%, and 0.70% using a DMT CCN counter (CCNc) and a TSI scanning mobility particle sizer (SMPS). The mean bulk size-integrated NCCN ranged from ∼500 cm−3 at SS = 0.15% to ∼2100 cm−3 at SS = 0.70%, and the mean bulk NCCN / NCN ratio ranged from 0.16 at

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Huang, X. F., L. Y. He, L. Xue, et al. "Highly time-resolved chemical characterization of atmospheric fine particles during 2010 Shanghai World Expo." Atmospheric Chemistry and Physics Discussions 12, no. 1 (2012): 1093–115. http://dx.doi.org/10.5194/acpd-12-1093-2012.

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Abstract. Shanghai, with a population of over 20 million, is the largest mega-city in China. Rapidly increasing industrial and metropolitan emissions have deteriorated its air quality in the past decades, with fine particle pollution as one of the major issues. However, systematic characterization of atmospheric fine particles with advanced measurement techniques has been very scarce in Shanghai. During 2010 Shanghai World Expo, we deployed a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) and a single particle soot photometer (SP2) in urban Shanghai between 15 May and 10

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Huang, X. F., L. Y. He, L. Xue, et al. "Highly time-resolved chemical characterization of atmospheric fine particles during 2010 Shanghai World Expo." Atmospheric Chemistry and Physics 12, no. 11 (2012): 4897–907. http://dx.doi.org/10.5194/acp-12-4897-2012.

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Abstract. Shanghai, with a population of over 20 million, is the largest mega-city in China. Rapidly increasing industrial and metropolitan emissions have deteriorated its air quality in the past decades, with fine particle pollution as one of the major issues. However, systematic characterization of atmospheric fine particles with advanced measurement techniques has been very scarce in Shanghai. During 2010 Shanghai World Expo, we deployed a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) and a single particle soot photometer (SP2) in urban Shanghai between 15 May and 10

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34

Huang, Wei, Harald Saathoff, Xiaoli Shen, Ramakrishna Ramisetty, Thomas Leisner, and Claudia Mohr. "Seasonal characteristics of organic aerosol chemical composition and volatility in Stuttgart, Germany." Atmospheric Chemistry and Physics 19, no. 18 (2019): 11687–700. http://dx.doi.org/10.5194/acp-19-11687-2019.

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Abstract. The chemical composition and volatility of organic aerosol (OA) particles were investigated during July–August 2017 and February–March 2018 in the city of Stuttgart, one of the most polluted cities in Germany. Total non-refractory particle mass was measured with a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS; hereafter AMS). Aerosol particles were collected on filters and analyzed in the laboratory with a filter inlet for gases and aerosols coupled to a high-resolution time-of-flight chemical ionization mass spectrometer (FIGAERO-HR-ToF-CIMS; hereafter CIMS),

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Craven, J. S., L. D. Yee, N. L. Ng, et al. "Analysis of secondary organic aerosol formation and aging using positive matrix factorization of high-resolution aerosol mass spectra: application to the dodecane low-NO<sub>x</sub> system." Atmospheric Chemistry and Physics Discussions 12, no. 7 (2012): 16647–99. http://dx.doi.org/10.5194/acpd-12-16647-2012.

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Abstract. Positive matrix factorization (PMF) of high-resolution laboratory aerosol mass spectra is applied for the first time, the results of which are consistent with molecular level MOVI-HRToF-CIMS aerosol-phase and CIMS gas-phase measurements. Secondary organic aerosol was generated by photooxidation of dodecane under low-NOx conditions in the Caltech environmental chamber. The PMF results exhibit three factors representing a combination of gas-particle partitioning, chemical conversion in the aerosol, and wall deposition. The slope of the measured high-resolution aerosol mass spectrometer

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Lee, Berto P., Yong Jie Li, Jian Zhen Yu, Peter K. K. Louie, and Chak K. Chan. "Physical and chemical characterization of ambient aerosol by HR-ToF-AMS at a suburban site in Hong Kong during springtime 2011." Journal of Geophysical Research: Atmospheres 118, no. 15 (2013): 8625–39. http://dx.doi.org/10.1002/jgrd.50658.

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Singh, Atinderpal, Rangu Venkata Satish, and Neeraj Rastogi. "Characteristics and sources of fine organic aerosol over a big semi-arid urban city of western India using HR-ToF-AMS." Atmospheric Environment 208 (July 2019): 103–12. http://dx.doi.org/10.1016/j.atmosenv.2019.04.009.

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Chhabra, P. S., A. T. Lambe, M. R. Canagaratna та ін. "Chemistry of α-pinene and naphthalene oxidation products generated in a Potential Aerosol Mass (PAM) chamber as measured by acetate chemical ionization mass spectrometry". Atmospheric Measurement Techniques Discussions 7, № 7 (2014): 6385–429. http://dx.doi.org/10.5194/amtd-7-6385-2014.

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Abstract. Recent developments in high resolution, time-of-flight chemical ionization mass spectrometry (HR-ToF-CIMS) have made possible the direct detection of atmospheric organic compounds in real-time with high sensitivity and with little or no fragmentation, including low volatility, highly oxygenated organic vapors that are precursors to secondary organic aerosol formation. Here, for the first time, we examine gas-phase O3 and OH oxidation products of α-pinene and naphthalene formed in the PAM flow reactor with an HR-ToF-CIMS using acetate reagent ion chemistry. Integrated OH exposures ran

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Zorn, S. R., F. Drewnick, M. Schott, T. Hoffmann, and S. Borrmann. "Characterization of the South Atlantic marine boundary layer aerosol using an aerodyne aerosol mass spectrometer." Atmospheric Chemistry and Physics 8, no. 16 (2008): 4711–28. http://dx.doi.org/10.5194/acp-8-4711-2008.

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Abstract. Measurements of the submicron fraction of the atmospheric aerosol in the marine boundary layer were performed from January to March 2007 (Southern Hemisphere summer) onboard the French research vessel Marion Dufresne in the Southern Atlantic and Indian Ocean (20° S–60° S, 70° W–60° E). We used an Aerodyne High-Resolution-Time-of-Flight AMS to characterize the chemical composition and to measure species-resolved size distributions of non-refractory aerosol components in the submicron range. Within the "standard" AMS compounds (ammonium, chloride, nitrate, sulfate, organics) "sulfate"

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Timonen, H., M. Aurela, S. Carbone, et al. "High time-resolution chemical characterization of the water-soluble fraction of ambient aerosols with PILS-TOC-IC and AMS." Atmospheric Measurement Techniques 3, no. 4 (2010): 1063–74. http://dx.doi.org/10.5194/amt-3-1063-2010.

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Abstract. A particle-into-liquid sampler (PILS) was coupled with a total organic carbon analyzer (TOC) and two ion chromatographs (IC) to enable high time-resolution measurements of water-soluble ions and water-soluble organic carbon (WSOC) by a single sampling and analytical set-up. The new high time-resolution measurement system, the PILS-TOC-IC, was able to provide essential chemical and physical information about fast changes in composition, concentrations and likely sources of the water-soluble fraction of atmospheric aerosol. The concentrations of major water-soluble ions and WSOC were m

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Craven, J. S., L. D. Yee, N. L. Ng, et al. "Analysis of secondary organic aerosol formation and aging using positive matrix factorization of high-resolution aerosol mass spectra: application to the dodecane low-NO<sub>x</sub> system." Atmospheric Chemistry and Physics 12, no. 24 (2012): 11795–817. http://dx.doi.org/10.5194/acp-12-11795-2012.

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Abstract. Positive matrix factorization (PMF) of high-resolution laboratory chamber aerosol mass spectra is applied for the first time, the results of which are consistent with molecular level MOVI-HRToF-CIMS aerosol-phase and CIMS gas-phase measurements. Secondary organic aerosol was generated by photooxidation of dodecane under low-NOx conditions in the Caltech environmental chamber. The PMF results exhibit three factors representing a combination of gas-particle partitioning, chemical conversion in the aerosol, and wall deposition. The slope of the measured high-resolution aerosol mass spec

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Healy, R. M., J. Sciare, L. Poulain, et al. "Quantitative determination of carbonaceous particle mixing state in Paris using single particle mass spectrometer and aerosol mass spectrometer measurements." Atmospheric Chemistry and Physics Discussions 13, no. 4 (2013): 10345–93. http://dx.doi.org/10.5194/acpd-13-10345-2013.

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Abstract. Single particle mixing state information can be a powerful tool for assessing the relative impact of local and regional sources of ambient particulate matter in urban environments. However, quantitative mixing state data are challenging to obtain using single particle mass spectrometers. In this study, the quantitative chemical composition of carbonaceous single particles has been estimated using an aerosol time-of-flight mass spectrometer (ATOFMS) as part of the MEGAPOLI 2010 winter campaign in Paris, France. Relative peak areas of marker ions for elemental carbon (EC), organic aero

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Sun, Y., Q. Zhang, A. M. MacDonald, et al. "Size-resolved aerosol chemistry on Whistler Mountain, Canada with a High-Resolution Aerosol Mass Spectrometer during INTEX-B." Atmospheric Chemistry and Physics Discussions 8, no. 6 (2008): 20749–98. http://dx.doi.org/10.5194/acpd-8-20749-2008.

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Abstract. An Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was deployed at the peak of Whistler Mountain (elevation 2182 m-MSL), British Columbia, from 19 April to 16 May 2006, as part of the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) campaign. The mass concentrations and size distributions of non-refractory submicron particle (NR-PM1) species (i.e., sulfate, nitrate, ammonium, chloride, and organics) were measured in situ every 5 min. The HR-ToF-AMS results agreed well with collocated measurements. The average concentration of non-refract

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Brege, Matthew, Marco Paglione, Stefania Gilardoni, Stefano Decesari, Maria Cristina Facchini, and Lynn R. Mazzoleni. "Molecular insights on aging and aqueous-phase processing from ambient biomass burning emissions-influenced Po Valley fog and aerosol." Atmospheric Chemistry and Physics 18, no. 17 (2018): 13197–214. http://dx.doi.org/10.5194/acp-18-13197-2018.

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Abstract. To study the influence of regional biomass burning emissions and secondary processes, ambient samples of fog and aerosol were collected in the Po Valley (Italy) during the 2013 Supersito field campaign. After the extent of fresh vs. aged biomass burning influence was estimated from proton nuclear magnetic resonance (1H NMR) and high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS), two samples of fog water and two samples of PM1 aerosol were selected for ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis. Molecular co

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Healy, R. M., J. Sciare, L. Poulain, et al. "Quantitative determination of carbonaceous particle mixing state in Paris using single-particle mass spectrometer and aerosol mass spectrometer measurements." Atmospheric Chemistry and Physics 13, no. 18 (2013): 9479–96. http://dx.doi.org/10.5194/acp-13-9479-2013.

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Abstract. Single-particle mixing state information can be a powerful tool for assessing the relative impact of local and regional sources of ambient particulate matter in urban environments. However, quantitative mixing state data are challenging to obtain using single-particle mass spectrometers. In this study, the quantitative chemical composition of carbonaceous single particles has been determined using an aerosol time-of-flight mass spectrometer (ATOFMS) as part of the MEGAPOLI 2010 winter campaign in Paris, France. Relative peak areas of marker ions for elemental carbon (EC), organic aer

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Zhu, Qiao, Xiao-Feng Huang, Li-Ming Cao, et al. "Improved source apportionment of organic aerosols in complex urban air pollution using the multilinear engine (ME-2)." Atmospheric Measurement Techniques 11, no. 2 (2018): 1049–60. http://dx.doi.org/10.5194/amt-11-1049-2018.

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Abstract. Organic aerosols (OAs), which consist of thousands of complex compounds emitted from various sources, constitute one of the major components of fine particulate matter. The traditional positive matrix factorization (PMF) method often apportions aerosol mass spectrometer (AMS) organic datasets into less meaningful or mixed factors, especially in complex urban cases. In this study, an improved source apportionment method using a bilinear model of the multilinear engine (ME-2) was applied to OAs collected during the heavily polluted season from two Chinese megacities located in the nort

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Hao, Liqing, Eetu Kari, Ari Leskinen, Douglas R. Worsnop та Annele Virtanen. "Direct contribution of ammonia to <i>α</i>-pinene secondary organic aerosol formation". Atmospheric Chemistry and Physics 20, № 22 (2020): 14393–405. http://dx.doi.org/10.5194/acp-20-14393-2020.

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Abstract. Ammonia (NH3), a gaseous compound ubiquitously present in the atmosphere, is involved in the formation of secondary organic aerosol (SOA), but the exact mechanism is still not well known. This study presents the results of SOA experiments from the photooxidation of α-pinene in the presence of NH3 in the reaction chamber. SOA was formed in in nucleation experiments and in seeded experiments with ammonium sulfate particles as seeds. The chemical composition and time series of compounds in the gas and particle phase were characterized by an online high-resolution time-of-flight proton-t

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Chen, Qingcai, Yuzo Miyazaki, Kimitaka Kawamura, et al. "Characterization of Chromophoric Water-Soluble Organic Matter in Urban, Forest, and Marine Aerosols by HR-ToF-AMS Analysis and Excitation–Emission Matrix Spectroscopy." Environmental Science & Technology 50, no. 19 (2016): 10351–60. http://dx.doi.org/10.1021/acs.est.6b01643.

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49

Sun, Y., Q. Zhang, A. M. Macdonald, et al. "Size-resolved aerosol chemistry on Whistler Mountain, Canada with a high-resolution aerosol mass spectrometer during INTEX-B." Atmospheric Chemistry and Physics 9, no. 9 (2009): 3095–111. http://dx.doi.org/10.5194/acp-9-3095-2009.

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Abstract. An Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was deployed at the peak of Whistler Mountain (2182 m above sea level), British Columbia, from 19 April to 16 May 2006, as part of the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) campaign. The mass concentrations and size distributions of non-refractory submicron particle (NR-PM1) species (i.e., sulfate, nitrate, ammonium, chloride, and organics) were measured in situ at 10-min time resolution. The HR-ToF-AMS results agreed well with collocated measurements. The average concentratio

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Xu, J., Q. Zhang, M. Chen, X. Ge, J. Ren, and D. Qin. "Chemical composition, sources, and processes of urban aerosols during summertime in Northwest China: insights from High Resolution Aerosol Mass Spectrometry." Atmospheric Chemistry and Physics Discussions 14, no. 11 (2014): 16187–242. http://dx.doi.org/10.5194/acpd-14-16187-2014.

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Abstract. An aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was deployed along with a Scanning Mobility Particle Sizer (SMPS) and a Multi Angle Absorption Photometers (MAAP) to measure the temporal variations of the mass loading, chemical composition, and size distribution of sub-micrometer particulate matter (PM1) in Lanzhou, northwest China, during 12 July–7 August 2012. The average PM1 mass concentration including non-refractory PM1 (NR-PM1) measured by HR-ToF-AMS and black carbon (BC) measured by MAAP during this study was 24.5 μg m−3 (ranging from 0.86 to 1

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