Nelson Shigeko Edwards

US Patent:

6598458, Jul 29, 2003

Filed:

Jan 18, 2002

Appl. No.:

10/051424

Inventors:

Nelson T. Edwards - Knoxville TN
Jeffery S. Riggs - Lafollette TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

G01N 3318

US Classification:

73 191, 7386474, 166264, 175 20

Abstract:

A chamber for trapping soil gases as they evolve from the soil without disturbance to the soil and to the natural microclimate within the chamber has been invented. The chamber opens between measurements and therefore does not alter the metabolic processes that influence soil gas efflux rates. A multiple chamber system provides for repetitive multi-point sampling, undisturbed metabolic soil processes between sampling, and an essentially airtight sampling chamber operating at ambient pressure.