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Title: Determination of volatile organic compounds in ambient air with gas chromatograph-flame ionization and ion trap detection

Two new techniques are utilized to integrate the following three equipments: an Entech 2000 automated air concentrator, a Hewlett Packard gas chromatograph (GC) with flame ionization detector (FID) and an ion trap mass spectrometer detector (ITD). This combined analytical system is used to determine low ppb level volatile organic compounds (VOC) in ambient air. The first technique is to configure the inlet system of the GC, so that the pressure regulated flow control system of the GC injection port is used to control the flow of both the desorb gas of the automated air concentrator and the carrier gas of the GC column. The injection port still can be used to inject gas and liquid samples directly. The second technique is to split the effluent of GC column at a 1:1 ratio to the ITD and the FID. In this way, both FID and ITD data can be obtained for each analysis. For ambient air non-methane hydrocarbons monitoring, the FID detector is widely used. Oxygen containing and halogenated organic compounds cannot be differentiated by FID detector and would be quantified as coeluting hydrocarbons. However, volatile organic compounds other than target hydrocarbons can be identified by ITD. This analytical system ismore » very valuable research tool for non-methane hydrocarbons and urban air toxic monitoring. The performances of this developed system have been presented.« less
Authors:
; ; ; ;  [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Environmental Research Inst.
Publication Date:
OSTI Identifier:
197447
Report Number(s):
CONF-9405167-
TRN: IM9612%%221
Resource Type:
Book
Resource Relation:
Conference: Measurement of toxic and related air pollutants, Durham, NC (United States), 3-6 May 1994; Other Information: PBD: 1994; Related Information: Is Part Of Measurement of toxic and related air pollutants. Proceedings of the 1994 U.S. EPA/A and WMA international symposium; PB: 1075 p.
Publisher:
Air and Waste Management Association, Pittsburgh, PA (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ORGANIC COMPOUNDS; AIR POLLUTION MONITORING; CHEMICAL ANALYSIS; AIR SAMPLERS; PERFORMANCE; EXPERIMENTAL DATA; VOLATILE MATTER; GAS CHROMATOGRAPHY; MASS SPECTROSCOPY; EMISSION SPECTROSCOPY