Screening volatile organics by direct sampling ion trap and glow discharge mass spectrometry
Two different types of direct sampling mass spectrometers are currently being evaluated in our laboratory for use as rapid screening tools for volatile organics in a wide range of environmental matrices. These include a commercially available ITMS ion trap mass spectrometer and a specially designed tandem source glow discharge quadrupole mass spectrometer. Both of these instruments are equipped with versatile sampling interfaces which enable direct monitoring of volatile organics at part-per-billion (ppb) levels in air, water, and soil samples. Direct sampling mass spectrometry does not utilize chromatographic or other separation steps prior to admission of samples into the analyzer. Instead, individual compounds are measured using one or more of the following methods: spectral subtraction, selective chemical ionization, and tandem mass spectroscopy (MS/MS). For air monitoring applications, an active sniffer'' probe is used to achieve instantaneous response. Water and soil samples are analyzed by means of high speed direct purge into the mass spectrometer. Both instruments provide a range of ionization options for added selectivity and the ITMS can also provide high efficiency collision induced dissociation MS/MS for target compound analysis. Detection limits and response factors have been determined for a large number volatile organics in air, water, and number of different soil types. 4 refs., 14 figs., 3 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- USDOD
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6255594
- Report Number(s):
- CONF-910278-1; ON: DE91007708
- Resource Relation:
- Conference: 2. international symposium on field screening methods for hazardous wastes and toxic chemicals, Las Vegas, NV (USA), 12-14 Feb 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
AIR
MASS SPECTROSCOPY
SOILS
WATER
BENZENE
CHLORIDES
CHLOROFORM
DETECTION
GLOW DISCHARGES
MASS SPECTROMETERS
MONITORING
ORGANIC MATTER
SAMPLING
AROMATICS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE COMPOUNDS
ELECTRIC DISCHARGES
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
MEASURING INSTRUMENTS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
SPECTROMETERS
SPECTROSCOPY
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
440800 - Miscellaneous Instrumentation- (1990-)
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)