Measuring and testing – Gas analysis – Gas chromatography
Patent
1995-06-06
1998-02-03
Noland, Thomas P.
Measuring and testing
Gas analysis
Gas chromatography
7386483, G01N 3020
Patent
active
057146764
ABSTRACT:
A gas component analyzing system having a diffusion scrubber and a chromatograph wherein a flow passage switch valve and a sample injection valve are switched to form a non-circulation flow passage for feeding an absorption liquid into the diffusion scrubber so that absorption liquid captures sample gas components until the sample gas components come into an equilibrium state. Then, both the above valves are switched to form a circulation flow passage for feeding the absorption liquid into a concentration column. Then, both the above valves are further switched to form the non-circulation flow passage to elute the sample gas components for subsequent detection thereof by the chromatograph.
REFERENCES:
patent: 4472354 (1984-09-01), Passell et al.
patent: 5073502 (1991-12-01), Steele
patent: 5152176 (1992-10-01), Bryselbout et al.
P. Lindgren et al., "Measurement of Atmospheric Sulfur Dioxide by Diffusion Scrubber Coupled Ion Chromatography", Analytical Chemisty, Jan. 1, 1989, vol. 61, No. 1, pp. 19-24.
Z. Genfa et al., "Measurement of Atmospheric Ammonia", Environ. Sci. Technol., Dec. 1989, vol. 23, No. 12, pp. 1467-1474.
S. Tanaka, "New Measurement Techinque of Acidic Gas in Atmosphere of Cities Using an Ion Chromatography", Feb. 1992, pp. 75-85, (in Japanese).
NEC Corporation
Noland Thomas P.
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