Apparatus for spectral analysis of chromatographic fractions

Details Apparatus for spectral analysis of chromatographic fractions Apparatus for spectral analysis of chromatographic fractions

1986-10-20

1988-08-16

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250339, 356432, G01J 342

Patent

active

047646764

ABSTRACT:
An apparatus for spectral analysis of chemical fractions is disclosed in which separate samples are frozen on a substrate, and infrared radiation passes through the sample either before or after it is reflected from a surface on the other side of the substrate from the sample. This permits radiation to move toward and away from the sample at the same side of the sample, thus simplifying the sample-cooling and sample-deposition techniques. The optical system is designed to defocus (and thus avoid detection of) unwanted radiation reflected by the sample.

REFERENCES:
patent: 3628872 (1971-12-01), Miranda
patent: 3999861 (1976-12-01), Bellinger
patent: 4129781 (1978-12-01), Doyle
patent: 4222670 (1980-09-01), Koshiishi
patent: 4473295 (1984-09-01), Doyle
patent: 4594533 (1986-06-01), Snook et al.
patent: 4661706 (1987-04-01), Messerschmidt et al.

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