Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1989-10-30
1991-05-28
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356305, 356328, G01J 330, G01J 340, G01J 328
Patent
active
050188569
ABSTRACT:
The instant invention relates to a process and apparatus for atomic absorption analysis, utilizing: atomization of a sample (containing one or more elements), illuminating the atomized sample with a continuum light source to produce a resultant light, directing the resultant light through a light dispersing means, detection of light at the focal plane of the light dispersing means using an integrating array detector (e.g. linear photodiode array) for converting the incident light into amplified electrical signals, blocking the incident light from striking the detector means and during this blocking utilizing the detector means to convert integrated intensities into amplified electrical signals, and deriving from these signals a value proportional to concentration. The present invention permits the aforementioned analysis to be performed at a very high rate i.e. at least 40 times per second.
REFERENCES:
patent: 3472594 (1969-10-01), Hughes et al.
patent: 3532429 (1970-10-01), Hughes et al.
patent: 3588252 (1971-06-01), Habosian
patent: 3752585 (1973-08-01), Elliott
patent: 3822098 (1974-07-01), Ruddler et al.
patent: 3901599 (1975-08-01), Meric
patent: 3985441 (1976-10-01), Schoeffel et al.
patent: 4030828 (1977-06-01), Sonobe et al.
patent: 4049353 (1977-09-01), Missio
patent: 4300833 (1981-11-01), Harnly et al.
patent: 4462685 (1984-07-01), Smith, Jr. et al.
patent: 4820048 (1989-04-01), Barnard
patent: 4940325 (1990-07-01), Becker-Ross et al.
"A Microcomputer-Controlled Background Correction System for Atomic Spectrometry", O'Haver et al., Analyst, May 1985, vol. 110.
"Design and Construction of a Time Multiplex Multiple Slit, Multielement Flame Atomic Absorption Spectrometer", Salin et al., Analytical Chemistry, Nov. 1978, vol. 50, No. 13.
Chuang, F. S. et al., Anal. Chem., 50, 525-530 (1978).
Coddling, E. G. et al., Anal. Chem., 52, 2133-2140 (1980).
Oldham et al., Anal. Instr., 16(2), 263-274 (1987).
Chinnock, R., ILC Engineering Note, No. 152, May 1982, 24 pp., ILC Tech., Sunnyvale, Calif.
Retzik, M. et al., "Concept and Design of a Simultaneous Multielement . . . ", Am. Lab., Sep. (1987), pp. 70-77.
McGeorge, Scott W., "Imaging Systems: Detectors of the Past . . . ", Spectroscopy, vol. 2, No. 4, 1987.
Description of McPherson Optical Systems, pp. A1 and A2, McPherson, Acton, Mass.
Skogerboe, R. K. et al., "A Dynamic Background Correction. . . ", Applied Sp., vol. 30, No. 5, 1976, pp. 495-500.
Epstein, M. S. et al., "Wavelength Modulation for . . . ", Applied Spect., vol. 30, No. 3, 1976, pp. 324-329.
CRIS Report, "Improved Instrumental Tech. for the Det. of Trace Metals", Proj. 0142504, placed on line 10/15/87.
CRIS Report, "Atomic Absorption Using a Pulsed continuum . . . ", Project 0142084, placed on line 5/26/87.
Harnly James M.
Moulton Gary P.
O'Haver Thomas C.
Evans F. L.
Hantis K. P.
Sadowski David R.
Silverstein M. Howard
The United States of America as represented by the Secretary of
LandOfFree
Continuum source atomic absorption spectrometry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuum source atomic absorption spectrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuum source atomic absorption spectrometry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-31838