Chemistry: analytical and immunological testing – Including chromatography
Patent
1988-02-19
1990-07-17
Warden, Robert J.
Chemistry: analytical and immunological testing
Including chromatography
2503381, 250341, 250352, 356244, 356326, 356426, 422 70, 422 83, 422 89, 422 8205, 436164, 436166, 436171, G01N 100, G01N 2100, G01N 3062
Patent
active
049421344
ABSTRACT:
A method and apparatus for scientific analysis of a sample under low temperature vacuum conditions uses a vacuum chamber with a conveyor belt disposed therein. One end of the conveyor belt is a cool end in thermal contact with the cold stage of a refrigerator, whereas the other end of the conveyor belt is a warm end spaced from the refrigerator. A septum allows injection of a sample into the vacuum chamber on top of the conveyor belt for spectroscopic or other analysis. The sample freezes on the conveyor belt at the cold end. One or more windows in the vacuum chamber housing allow spectroscopic analysis of the sample. Following the spectroscopic analysis, the conveyor belt may be moved such that the sample moves toward the warm end of the conveyor belt where upon it evaporates, thereby cleaning the conveyor belt. Instead of injecting the sample by way of a septum and use of a syringe and needle, the present device may be used in series with capillary-column gas chromatography or micro-bore high performance liquid chromatography.
REFERENCES:
patent: 4158772 (1979-06-01), Reedy
patent: 4495414 (1985-01-01), Barrie et al.
patent: 4594226 (1986-06-01), Reedy
patent: 4600559 (1986-07-01), Hiatt
Kirkbright, G. F. & C. G. De Lima, The Detection and Determination of Polynuclear Aromatic Hydrocarbons by Luminescence Spectrometry Utilixing the Shpol'skii Effect at 77 K, Analyst, Jun., 1974, vol. 99, pp. 338-354.
Inman, E. L., Jr., A. Jurgensen & J. D. Winefordner, Analytical Figures of Merit for Low-Temperature Luminescence of Polynuclear Aromatic Compounds, Analyst, May, 1982, vol. 107, pp. 538-543.
Lai, E. Q., E. L. Inmar, Jr., & J. D. Winefordner, Conventional Fluorescence Spectrometry of Polynuclear Aromatic Hydrocarbons in Shpol'skii Matrices at 77 K*, Talanta, vol. 29, pp. 601-608, 1982.
Colmsjo, Anders & Ulf Stenberg, Identification of Polynuclear Aromatic Hydrocarbons by Shpol'skii Low Temperature Fluorescence, Analytical Chemistry, vol. 51, p. 145, Jan. 1979.
Ward, J. L., R. P. Bateh & J. D. Winefordner, Evaluation of an Effective Conduction Cooling Device for Low-Temperature Phosphorimetry, Applied Spectroscopy, vol. 34, No. 1, 1980, pp. 15-17.
Ward, J. L., G. L. Walden, R. P. Bateh & J. D. Winefordner, A New, More Efficient Conduction Cooling Device for Low Temperature Phosphorimetry, Applied Spectroscopy, vol. 34, No. 3, 1980, pp. 348-350.
Colmsjo, Anders & Ulf Stenberg, The Effect of n-Alkane Solvents on Low Temperature Quasilinear Fluorescence Spectra of Some Polyaromatic Hydrocarbons, Dept. of Analytical Chemistry, Univ. of Stockholm, 1976.
Reedy, Gerald T., Deon G. Ettinger, & John F. Schneider, High-Resolution Gas Chromatography/Matrix Isolation Infrared Spectrometry, Analytical Chemistry, vol. 57, No. 8, Jul. 1985, pp. 1602-1609.
Hauge, Robert H., Leif Fredin, Zakya H. Kafafi & John L. Margrave, A Multisurface Matrix-Isolation Apparatus, Applied Spectroscopy, vol. 40, No. 5, 1986, pp. 588-595.
Jones Bradley T.
Winefordner James D.
Clarke Dennis P.
McMahon Timothy M.
The University of Florida
Warden Robert J.
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