Thermoelectrically cooled water trap

Details Thermoelectrically cooled water trap Thermoelectrically cooled water trap

2006-02-21

2006-02-21

Noland, Thomas P. (Department: 2856)

Measuring and testing

Sampler, sample handling, etc.

With heating or cooling

C062S003400, C073S031070

Reexamination Certificate

active

07000490

ABSTRACT:
A water trap system based on a thermoelectric cooling device is employed to remove a major fraction of the water from air samples, prior to analysis of these samples for chemical composition, by a variety of analytical techniques where water vapor interferes with the measurement process. These analytical techniques include infrared spectroscopy, mass spectrometry, ion mobility spectrometry and gas chromatography. The thermoelectric system for trapping water present in air samples can substantially improve detection sensitivity in these analytical techniques when it is necessary to measure trace analytes with concentrations in the ppm (parts per million) or ppb (parts per billion) partial pressure range. The thermoelectric trap design is compact and amenable to use in a portable gas monitoring instrumentation.

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