Measuring and testing – Gas analysis – With compensation detail
Patent
1997-04-28
1999-04-13
Williams, Hezron E.
Measuring and testing
Gas analysis
With compensation detail
G01N 700
Patent
active
058940839
ABSTRACT:
A standard gas introduction passage and an air inlet port are provided on positions downstream and upstream a dehumidifier respectively. A zero gas and a span gas are measured in dry states, a value of the atmosphere introduced from the air inlet port which is measured in the same moisture concentration as the sample gas is subtracted as a moisture interference value from the measured value of the sample gas for correcting moisture interference, and calibration curve data are applied to a result of measurement after the correction. Calibration can be finished in a short period, whereby the capacities of standard gas cylinders can be reduced and the overall device can be miniaturized.
REFERENCES:
patent: 4869874 (1989-09-01), Falat
patent: 4921886 (1990-05-01), Ewan et al.
patent: 5242836 (1993-09-01), Rose
patent: 5469369 (1995-11-01), Rose-Pehrsson et al.
Araya Katsuhiko
Hiraoka Shusuke
Kanki Yoshihide
Matsuhisa Hiroaki
Murakami Hiroshi
Politzer Jay L.
Shimadzu Corporation
Williams Hezron E.
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