Ultraviolet and visible light absorbance detector

Details Ultraviolet and visible light absorbance detector Ultraviolet and visible light absorbance detector

1998-12-08

2000-10-03

Ham, Seungsook

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250576, 356246, 73 6148, G01N 1506

Patent

active

061276901

ABSTRACT:
An ultraviolet and visible light absorbance detector uses a flow cell having a sample cell opening and a reference opening formed therethrough extending parallel to each other. The reference opening has a cross-sectional shape which is elongated in a direction perpendicular to the direction of its extension. An optical system causes an image of a slit to be formed with dispersed light over an area which includes light-receiving windows of both these openings, and portions of the dispersed light, after passing through these openings, are individually detected by light-receiving elements of a light-receiving device. Since the reference opening has an increased sectional area and its light throughput is increased, the absorbance noise due to the reference opening is reduced and the overall S/N ratio of the detector is improved.

REFERENCES:
patent: 5398110 (1995-03-01), Kitaoka

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