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The paper presents a strategy for sampling and analysis of VOC and reports on a new system for the analysis of VOC in air. The device consists of a gas chromatograph equipped with a sampling loop (50 to 200 ml) and a liquid nitrogen cooled microtrap, placed in the chromatographic oven, connected via a value with the sampling loop. The system allows 24-hour sampling and analysis of a large number of VOC (up to 25 individual hydrocarbons) ranging from C(2) to C(9). Because of the special geometry of the trap, a minimum consumption of liquid nitrogen (150-300 ml) for each analytical run is required. In-field measurements in urban and remote areas have demonstrated the ability of the system to work under different environmental conditions and to respond to concentrations for individual hydrocarbons down to pptv level.

Additional information

Authors: KOTZIAS D, JRC Ispra (IT);DUANE M, JRC Ispra (IT);MUNARI F, Fisons-Instruments, Rodano (IT)
Bibliographic Reference: Paper presented: Air Pollution 95, Porto Carras (GR), September 27-29, 1995
Availability: Available from (1) as Paper EN 39300 ORA
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