Photometric apparatus and process

Details Photometric apparatus and process Photometric apparatus and process

1990-09-20

1993-03-16

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

2504581, G01J 330, F21V 916

Patent

active

051949156

ABSTRACT:
A photometric apparatus is provided for analyzing a sample liquid capable of fluorescing when exposed to excitation light. The sample liquid, surrounded by a sheath liquid under conditions of laminar flow to form an interface between the sample liquid and the sheath is passed through a cell conduit. An excitation light is directed axially into the sample liquid and is totally internally reflected at the interface with the sheath liquid. The sample fluoresces in response to the excitation light and fluorescent emission is observed through the sheath liquid.

REFERENCES:
patent: 4515274 (1985-05-01), Hollinger et al.
patent: 4867559 (1989-09-01), Bach
patent: 4934811 (1990-06-01), Watts et al.

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