Optics: measuring and testing – With plural diverse test or art
Patent
1983-02-08
1985-04-09
Evans, F. L.
Optics: measuring and testing
With plural diverse test or art
356316, G01N 2173
Patent
active
045098557
ABSTRACT:
A chromatographic system that utilizes one detection system for gas chromatographic and micro-liquid chromatographic determinations. The detection system is a direct-current, atmospheric-pressure, helium plasma emission spectrometer. The detector utilizes a non-transparent plasma source unit which contains the plasma region and two side-arms which receive effluents from the micro-liquid chromatograph and the gas chromatograph. The dual nature of this chromatographic system offers: (1) extreme flexibility in the samples to be examined; (2) extremely low sensitivity; (3) element selectivity; (4) long-term stability; (5) direct correlation of data from the liquid and gas samples; (6) simpler operation than with individual liquid and gas chromatographs, each with different detection systems; and (7) cheaper than a commercial liquid chromatograph and a gas chromatograph.
REFERENCES:
patent: 3612686 (1971-10-01), Braman et al.
Carnahan et al., Anal. Chimica Acta, 130, (2), Oct. 1981, pp. 227-241.
Wasik et al., J. Chromatog, Sci, vol. 18, Dec. 1980, pp. 660-663.
Lloyd et al., Anal. Chem. vol. 50, No. 14, Dec. 1978, pp. 2025-2029.
Layman et al., Anal. Chem., vol. 53, No. 4, Apr. 1981, pp. 747-748.
Young, J. Chromatography, vol. 21, No. 2, Sep. 1981, pp. 197-201.
Broerman et al., J. Chromatog Sci, vol. 19, Oct. 1981, pp. 508-513.
McGuffin et al., J. Chromatography, vol. 218, Nov. 1981, pp. 179-187.
Evans F. L.
The United States of America as represented by the United States
Westerdahl Allen F.
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