HR: 1340h
AN: A53C-0918    [Abstracts]
TI: Deployment of a Cryo-less GC System at Appledore Island for VOC Measurements during the ICARTT 2004 Campaign
AU: * Sive, B C
EM: bcs@ccrc.sr.unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Troop, D
EM: don.troop@unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Wang, Y
EM: yw@gust.sr.unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Wingenter, O W
EM: oliver@nmt.edu
AF: New Mexico Tech, Department of Chemistry, Socorro, NM 87801 United States
AU: Varner, R
EM: ruth.varner@unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Zhou, Y
EM: yzhou@gust.sr.unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Russo, R S
EM: rrusso@resolution.sr.unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Nielsen, C
EM: lnielsen@cisunix.unh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AU: Talbot, R W
EM: bob@resolution.sr.umh.edu
AF: University of New Hampshire, Climate Change Research Center 39 College Road, Durham, NH 03824 United States
AB: A large suite of nonmethane hydrocarbons (NMHCs), halocarbons, alkyl nitrates and oxygenated volatile organic compounds (OVOCs) were measured at Appledore Island as part of the ICARTT 2004 campaign using a prototype, cryo-less concentrator system coupled to a gas chromatograph (GC) equipped with two flame ionization detectors (FIDs), one electron capture detector (ECD), and a mass spectrometer (MS). The trace gas system utilizes novel cooling technologies for the concentration of air samples without the use of liquid nitrogen or solid absorbents, making this system unique and robust. A 1500 cc sample was trapped at -175 C with a custom Kleemenko cooler (MMR Technologies, Inc.) coupled to an all Silonite coated (Entech Instruments, Inc.) stainless-steel valving system that was built in-house for sample concentration. After samples were concentrated, they were isolated, rapidly heated and injected. After injection, the sample was quantatively split in to 4 sub-streams, each feeding a separate column-detector pair. A Shimadzu GC-17A housed the 4 different separation columns which were coupled to the FIDs, ECD and the Shimadzu QP-5050A MS. The NMHCs were primarily separated on two different separation columns (PLOT and VF-5ms) equipped with FIDs. The halocarbons and alkynitrates were measured using an OV-1701 column coupled to the ECD. Selected hydrocarbons, halocarbons, and OVOCs were separated and quantified using an OV-624 coupled to the MS. To demonstrate the capabilities of this novel, cryo-less trace gas analytical system, results from this GC system are compared with measurements conducted concurrently during the ICARTT campaign at Appledore Island using a PTR-MS and from canister samples analyzed in our laboratory at UNH using a GC-FID/ECD/MS system. Overall, very good agreement between all three measurement techniques were observed for most compounds measured during the ICARTT study period.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting