Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1992-07-10
1993-12-28
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204299R, 356246, 356344, G01N 2726, G01N 27447
Patent
active
052736334
ABSTRACT:
The present invention features a system for detecting a substance in a fluid sample. A capillary is provided with a longitudinal axis and a channel is formed in it for receiving a fluid sample. The channel is disposed parallel to the longitudinal axis. A reflecting surface surrounds the outer surface of the capillary for reflecting electromagnetic energy. The reflecting surface has an incident window for allowing the electromagnetic energy to enter the capillary and an exit window for allowing the electromagnetic energy to exit the capillary. The exit window is disposed downstream of the incident window with respect to the longitudinal axis, so that the electromagnetic energy that enters the capillary is internally reflected more than once by the reflecting surface.
REFERENCES:
patent: 3418053 (1968-12-01), Pelavin
patent: 3431424 (1969-03-01), Allen
patent: 3999861 (1976-12-01), Bellinger
patent: 4690560 (1987-01-01), Coogan
Xiaobing Xi and Edward S. Yeung "Axial-Beam On-Column Absorption Detection for Open Tubular Capillary Liquid Chromatography" Analytical Chemistry, vol. 62, No. 15 (1990) 1580-1584.
Takao Tsuda, Jonathan V. Sweedler, and Richard N. Zare "Rectangular Capillaries for Capillary Zone Electrophoresis" Analytical Chemistry, vol. 62, No. 19 (1990) 2149-2152.
Philip L. Hanst "Spectroscopic Methods for Air Pollution Measurement" Advances in Environmental Science and Technology, vol. 2 edited by James N. Pitts, Jr. and Robert L. Metcalf (1971) 91-165.
Niebling John
Starsiak Jr. John S.
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