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A method for extracting calibrated volatility information from the FIGAERO-HR-ToF-CIMS and its experimental application

Journal Article · · Atmospheric Measurement Techniques (Online)
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [2];  [2];  [4];  [5];  [6];  [7];  [7];  [3];  [3];  [3];  [3]
  1. Univ. of Manchester (United Kingdom); DOE/OSTI
  2. Univ. of Gothenburg (Sweden)
  3. Univ. of Manchester (United Kingdom)
  4. Univ. of Manchester (United Kingdom); National Centre for Atmosphere Science, Manchester (United Kingdom)
  5. Inst. for Atmospheric and Climate Science, ETH Zürich (Switzerland)
  6. Univ. of Bristol (United Kingdom)
  7. Aerodyne Research, Billerica, MA (United States)
+ Show Author Affiliations
The Filter Inlet for Gases and AEROsols (FIGAERO) is an inlet specificallydesigned to be coupled with the Aerodyne High-Resolution Time-of-FlightChemical Ionization Mass Spectrometer (HR-ToF-CIMS). The FIGAERO-HR-ToF-CIMSprovides simultaneous molecular information relating to both the gas- andparticle-phase samples and has been used to extract vapour pressures (VPs) ofthe compounds desorbing from the filter whilst giving quantitativeconcentrations in the particle phase. However, such extraction of vapourpressures of the measured particle-phase components requires use ofappropriate, well-defined, reference compounds. Vapour pressures for thehomologous series of polyethylene glycols (PEG)((H-(O-CH2-CH2)n-OH) for n=3 to n=8), covering a rangeof vapour pressures (VP) (10-1 to 10-7 Pa) that areatmospherically relevant, have been shown to be reproduced well by a range ofdifferent techniques, including Knudsen Effusion Mass Spectrometry (KEMS).This is the first homologous series of compounds for which a number of vapourpressure measurement techniques have been found to be in agreement,indicating the utility as a calibration standard, providing an ideal set ofbenchmark compounds for accurate characterization of the FIGAERO forextracting vapour pressure of measured compounds in chambers and the realatmosphere. To demonstrate this, single-component and mixture vapour pressuremeasurements are made using two FIGAERO-HR-ToF-CIMS instruments based on anew calibration determined from the PEG series. VP values extracted from bothinstruments agree well with those measured by KEMS and reported values fromliterature, validating this approach for extracting VP data from the FIGAERO.This method is then applied to chamber measurements, and the vapour pressuresof known products are estimated.
Research Organization:
Aerodyne Research, Inc., Billerica, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0004577
OSTI ID:
1610741
Journal Information:
Atmospheric Measurement Techniques (Online), Journal Name: Atmospheric Measurement Techniques (Online) Journal Issue: 3 Vol. 12; ISSN 1867-8548
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Photolytically induced changes in composition and volatility of biogenic secondary organic aerosol from nitrate radical oxidation during night-to-day transition journal October 2021
Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing) journal January 2019
Deconvolution of FIGAERO-CIMS thermal desorption profiles using positive matrix factorisation to identify chemical and physical processes during particle evaporation text January 2020

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