Direct trace analysis of volatile organic compounds in air using ion trap mass spectrometers with filtered noise fields
- Battelle Memorial Inst., Columbus, OH (United States)
- Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.
Two ion trap mass spectrometers and direct air sampling interfaces are being evaluated in the laboratory for monitoring toxic air pollutants in real time. The mass spectrometers are the large, laboratory-based Finnigan MAT ion trap (ITMS{trademark}) and the compact, field-deployable Teledyne 3DQ Discovery{trademark} ion trap. Both instruments are equipped with filtered noise field (FNF) technology, which minimizes the effects due to space charging normally associated with ion traps, provides a unique means of isolating individual target compounds in complex mixtures, and permits tandem mass spectrometry (MS/MS) operation for unambiguous characterization of individual compounds with high sensitivity and specificity. The combination direct air sampling/ion trap/FNF systems are being evaluated using a semipermeable tubular membrane interface and an atmospheric sampling glow discharge ionization (ASGDI) source to measure selected volatile organic compounds (VOCs) in air continuously in real time. Nonpolar and polar VOCs are measured at trace levels, using an environmental test chamber as the source of the target compound mixtures at known concentrations. Experiments conducted with the combination systems demonstrate the power of the FNF method and delineate the advantages and disadvantages of the two direct air sampling interfaces for monitoring VOCs.
- OSTI ID:
- 231021
- Report Number(s):
- CONF-950209-; TRN: IM9623%%331
- Resource Relation:
- Conference: 4. international symposium on field screening methods for hazardous wastes and toxic chemicals, Las Vegas, NV (United States), 22-24 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Field screening methods for hazardous wastes and toxic chemicals. VIP-47, Volume 1; PB: 733 p.
- Country of Publication:
- United States
- Language:
- English
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