HR: 11:20h
AN: A42B-04 [Abstracts]
TI: Characterization of a TD-CIMS instrument for aircraft measurements of PeroxyAcetyl Nitrate (PAN)
compounds
AU: * Swanson, A L
EM: aswanson@ucar.edu
AF: CIRES, University of Colorado, 260 UCB, Boulder, CO 80309
United States
AU: Flocke, F
EM: ffl@ucar.edu
AF: ACD/NCAR, 1850 Table Mesa Dr., Boulder, CO 80305
United States
AU: Roberts, J
EM: james.r.roberts@al.noaa.gov
AF: AL/NOAA, RAL 7, 325 Broadway, Boulder, CO 80305
United States
AU: Huey, G
EM: greg.huey@eas.gatech.edu
AF: EAS/GaTech, 311 Ferst Drive, Atlanta, GA 30332
United States
AU: Tanner, D
EM: david.tanner@eas.gatech.edu
AF: EAS/GaTech, 311 Ferst Drive, Atlanta, GA 30332
United States
AU: Orlando, J
EM: orlando@ucar.edu
AF: ACD/NCAR, 1850 Table Mesa Dr., Boulder, CO 80305
United States
AU: Tyndall, G
EM: tyndall@ucar.edu
AF: ACD/NCAR, 1850 Table Mesa Dr., Boulder, CO 80305
United States
AU: Hanson, D
EM: dhanson@ucar.edu
AF: ACD/NCAR, 1850 Table Mesa Dr., Boulder, CO 80305
United States
AB:
Results are presented for a detailed characterization of a Thermal Dissociation - Chemical Ionization Mass Spectrometer
(TD-CIMS) method for the atmospheric measurement of Peroxyacetyl Nitrate (PAN, CH3C(O)O2NO2) compounds on board the NOAA P3
research aircraft. A detailed laboratory characterization of the TD-CIMS instrument was carried out in preparation for
deployment on a research aircraft. The TD-CIMS was cross-calibrated against a dual channel fast GC/ECD and a total nitrogen
oxide (NOy) instrument to determine calibration factors and relative sensitivities for the PAN homologues (PAN, PPN, PiBN,
APAN, and MPAN). In addition, the PAN homologues were produced in a 50 liter reaction chamber from which the TD-CIMS was
cross calibrated against a long path FTIR connected to the reaction chamber. Some novel PAN homologues
(1-hydroxyl-peroxyacetyl nitrate and methoxyformyl nitrate) were also produced in the chamber to investigate the TD-CIMS
measurement capabilities. Discussion will highlight the capabilities of the new TD-CIMS and its performance during the
recent New England Air Quality Study as part of the 2004 ICARTT intensive. Based on the TD-CIMS performance during the
ICARTT campaign it will also be demonstrated that the fast response and high sensitivity of this method is ideal for aircraft
platforms.
UR: http://tropchem.al.noaa.gov/
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution--urban and regional (0305)
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting