Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Patent
1976-03-22
1977-02-08
Corbin, John K.
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
356201, G01N 110
Patent
active
040069907
ABSTRACT:
Single and dual beam flow cells for liquid chromatography that provide good detectability and linear response with small sample volumes. A cylindrical window surrounds the sample flow path to permit focusing convergent light rays through the center of the flow path and along optical paths of equal length through the cell. Optical stops limit the light passing through the cell to convergent rays incident to the window surface. A wide acceptance angle for the rays results in high light transmission and averages variations in light output along the light source. A dual beam flow cell utilizes a common exit for the sample and reference liquids. The flow cells are economically constructed for direct coupling to a chromatographic column by using a standard compression fitting union and can be used in a single wavelength or discrete wavelength detector, or in a spectrophotometer.
REFERENCES:
patent: 2617940 (1952-11-01), Giguere
patent: 3263554 (1966-08-01), Pickels
patent: 3480369 (1969-11-01), Smytae et al.
patent: 3920334 (1975-11-01), Steichen et al.
Cole Stanley Z.
Corbin John K.
Fisher Gerald M.
Henry Jon W.
Morrissey John J.
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