Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1982-08-12
1984-09-11
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
G01N 2173
Patent
active
044706995
ABSTRACT:
In a direct current plasma emission spectrometer for use in combination with a micro-column liquid chromatograph, an improved plasma source unit. The plasma source unit includes a quartz capillary tube having an inlet means, outlet off gas means and a pair of spaced electrodes defining a plasma region in the tube. The inlet means is connected to and adapted to receive eluant of the liquid chromatograph along with a stream of plasma-forming gas. There is an opening through the wall of the capillary tube penetrating into the plasma region. A soft glass capillary light pipe is disposed at the opening, is connected to the spectrometer, and is adapted to transmit light passing from the plasma region to the spectrometer. There is also a source of electromotive force connected to the electrodes sufficient to initiate and sustain a plasma in the plasma region of the tube.
REFERENCES:
patent: 3055262 (1962-09-01), Ducati et al.
patent: 3242798 (1966-03-01), Yamamoto
patent: 3610759 (1971-10-01), Wood et al.
patent: 3612686 (1971-10-01), Braman et al.
patent: 3802782 (1974-04-01), Natelson
patent: 3958883 (1976-05-01), Turner
patent: 4225235 (1980-09-01), Anderson et al.
patent: 4256404 (1981-03-01), Walker
patent: 4351643 (1982-09-01), Govindaraju
Ishii et al., Journal of Chromatography, vol. 144, 1977, pp. 157-168.
Ishii et al., Journal of Chromatographic Science, vol. 18, Sep. 1980, pp. 462-472.
McGuffin et al., Analytical Chemistry, vol. 53, No. 7, Jun. 1981, pp. 946-951.
Lloyd et al., Analytical Chemistry, vol. 50, No. 14, Dec. 1978, pp. 2025-2029.
Sch/a/ fer et al., Journal of Chromatography, vol. 206, Feb. 1981, pp. 245-252.
Novotny, Journal of Chromatographic Science, vol. 18, Sep. 1980, pp. 473-478.
Takeuchi et al., Journal of Chromatography, vol. 213, Aug. 1981, pp. 25-32.
Reese et al., Journal of Chromatographic Science, vol. 18, Sep. 1980, pp. 479-486.
Krien et al., Journal of Chromatography, vol. 251, 1982, pp. 129-139.
Dedieu et al., Journal of Chromatography, vol. 251, 1982, pp. 202-213.
Esposito Michael F.
Evans F. L.
The United States of America as represented by the United States
Westerdahl Allen F.
LandOfFree
Micro-column plasma emission liquid chromatograph does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Micro-column plasma emission liquid chromatograph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micro-column plasma emission liquid chromatograph will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1192377