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United States Department of Agriculture

Agricultural Research Service

Closed Chamber Methods
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Closed chambers used for measuring greenhouse gas emissions.

Samples are collected at 0, 30, and 60 min for subsequent analysis by gas chromatography (GC). 
GC analysis uses a Teledyne-Tekmar autosampler connected to two Hewlett-Packard GCs equipped
with thermal conductivity, electron capture, and flame ionization detectors.




Last Modified: 9/28/2005