Long capillary waveguide raman cell

Details Long capillary waveguide raman cell Long capillary waveguide raman cell

1995-11-16

1997-02-18

Gonzalez, Frank

Optics: measuring and testing

Sample, specimen, or standard holder or support

Fluid containers

356338, 356339, 356343, G01N 110

Patent

active

056045875

ABSTRACT:
The chemical properties of an aqueous liquid, the liquid comprising a solvent having an index of refraction which is the same as or closely approaches that of water, are determined by Raman spectroscopy wherein a sample of the liquid is delivered into an optical waveguide. The waveguide is in the form of a capillary having a reflective surface defined by a material having a refractive index of less than 1.33. Excitation light is transmitted axially into the liquid at an end of the waveguide. The excitation light is transmitted the length of the waveguide, by reflection from the reflective surface, causing the fluid to emit Raman spectra. The Raman spectra is transmitted along the waveguide, collected and delivered to a spectrometer.

REFERENCES:
patent: 4690560 (1987-09-01), Coogan
patent: 5134445 (1992-07-01), Toge
patent: 5485270 (1996-01-01), Freud et al.

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