Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1999-05-25
2000-09-19
Font, Frank G.
Optics: measuring and testing
By particle light scattering
With photocell detection
356 37, G01N 2100
Patent
active
061220558
ABSTRACT:
An evaporative light scattering detector (1) has a solvent nebulizer (4) through which an atomised spray of solute solvent solution passes, a heated evaporation chamber (5) and a detector system (6). A diffuser trapping device (7), supported by fine wires, is positioned in the evaporation chamber(5) at about two fifths of the height of the chamber from the top. The diffuser trapping device (7) is made from randomly coiled stainless steel ribbon which gives it a large surface area. The detection system (6) is positioned at the bottom of the evaporation chamber through which a beam of collimated light passes and is scattered by the solvent and detected by a light sensitive device (14). The diffuser trapping device (7) aids evaporation of the solvent and prevents large particles from travelling further down the evaporation chamber (5).
REFERENCES:
patent: 4990740 (1991-02-01), Meyer
patent: 5374396 (1994-12-01), Blackford et al.
patent: 5454274 (1995-10-01), Zhu
Mourey, T.H., et al., "Principles of Operation of an Evaporative Light-Scattering Detector for Liquid Chromatograph", Anal. Chem (1984), 56:2427-2434.
Righezza, M., et al., "Effect of the Nature of the Solvent and Solutes on the Response of a Light-Scattering Detector", Journal of Liquid Chromotography, (1988) 11:1967-2004.
Smith, R.M., et al., "Separation of Saturated and Unsaturated Fatty Acid Methyl Esters by Supercritical Fluid Chromatography on a Silica Column", Analyst, (May 1994), vol. 119, pp. 921-924.
Cocks, S., et al., "Analysis of Fatty Acid Methyl Esters by Using Supercritical Fluid Chromatography with Mass Evaporation Light Scattering Detection", Analytical Proceedings (Jan. 1991), vol. 28, pp. 11-12.
Dreux, M., et al., "Mesure de la diffusion de la lumiere sur des microparticules en phase gazeuse. Utilisations actuelles. Perspectives", Analysis, (1992), 20:587-595.
Claes Paul
O'Donohue Stephen J
Warner Frank P.
Wrench Nathan
Font Frank G.
Manus Peter J.
Nguyen Tu T.
Polymer Laboratories Limited
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