On-line gas chromatograph with sample preparation, concentration

Details On-line gas chromatograph with sample preparation, concentration On-line gas chromatograph with sample preparation, concentration

1999-05-05

2000-12-26

Spitzer, Robert H.

Gas separation: processes

Chromatography

95 87, 96101, 96105, B01D 5302

Patent

active

061652512

ABSTRACT:
Apparatus and method for periodic analysis of trace amounts of volatile organic compounds in a waste gas provide for feeding of a sample of a waste gas first to an organics concentrator which isolates the volatile organic compounds from the waste gas sample and prepares a concentrated sample for feed to a gas chromatograph. In normal operation, a waste gas is continuously sampled from the waste gas source to produce a continuous waste gas flow through a switching valve and out a vent. A portion of that waste gas flow is periodically diverted by the switching valve and routed to the organics concentrator. The switching valve also receives calibration samples containing known concentrations of the volatile organic compounds prepared in a gas blender. It periodically feeds the calibration samples to the organics concentrator and the gas chromatograph for calibration of the system.

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patent: 5827353 (1998-10-01), O'Neil
patent: 5861316 (1999-01-01), Cage et al.

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