Measurement of volatile organics at part per billion concentrations using a cold trap inlet and high speed gas chromatography
- Univ. of Michigan, Ann Arbor (United States)
A high speed GC system featuring a capillary cold trap inlet and variable speed electrometer-amplifier was developed and tested. The gas cooled inlet was used to collect and focus organic vapors from injection volumes of up to 1 ml. Resistance heating of the metal cold trap produced a narrow injection band that allowed simple separations to be completed in 5 to 20 seconds. Use of a variable speed electrometer-amplifier allowed the response time and noise suppression characteristics to be adjusted to the needs of the specific analysis. Simple mixtures of organics including aromatics, alkanes and chlorinated hydrocarbons were separated in 20 seconds or less. The limits of detection for 13 test compounds ranged from less than 1 part per billion by volume (ppbv) to about 50 ppbv. Data presented here indicate that high speed GC using a cold trap inlet may be a feasible approach for near real-time measurement of volatile organics in ambient air.
- OSTI ID:
- 5042406
- Journal Information:
- Journal of the Air and Waste Management Association; (United States), Journal Name: Journal of the Air and Waste Management Association; (United States) Vol. 41:8; ISSN JAWAE; ISSN 1047-3289
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
ALKANES
AROMATICS
CHROMATOGRAPHY
COLD TRAPS
CONDENSERS
EFFICIENCY
FLUIDS
GAS CHROMATOGRAPHY
GASES
HYDROCARBONS
MEASURING METHODS
MONITORING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTANTS
POLLUTION
REAL TIME SYSTEMS
SEPARATION PROCESSES
TRAPS
VAPOR CONDENSERS
VAPORS