Sample collection apparatus for analysis of air pollution...

Details Sample collection apparatus for analysis of air pollution... Sample collection apparatus for analysis of air pollution...

2008-07-01

2008-07-01

Williams, Hezron E. (Department: 2856)

Measuring and testing

Gas analysis

Ambient air

Reexamination Certificate

active

11712190

ABSTRACT:
Disclosed herein is a sample collection apparatus which includes a pretreatment unit arranged in front of a sample collection section to remove moisture, a first Peltier trap positioned at the lower side of the pretreatment unit to perform cooling condensation and thermal desorption, a switching valve connected to the rear of the pretreatment unit to determine flow paths through first, second, third and fourth ports, a sample collection section arranged at the rear of the switching valve to collect samples, a second Peltier trap positioned at the lower side of the sample collection section to perform thermal desorption, a first air pump connected to the second port of the switching valve to intake air, a second air pump connected to the rear of the sample collection section to intake and exhaust air, and a sample analyzer connected to the fourth port of the switching valve to analyze the samples.

REFERENCES:
patent: 5872305 (1999-02-01), Springmann
patent: 5970804 (1999-10-01), Robbat, Jr.
patent: 6353225 (2002-03-01), Strzoda et al.
patent: 6418781 (2002-07-01), Nishina et al.
patent: 6494077 (2002-12-01), Aoyama et al.
patent: 6815670 (2004-11-01), Jenkins et al.
patent: 7087434 (2006-08-01), Chen et al.

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