Retention time chromatograph employing an IR absorption spectrog

Details Retention time chromatograph employing an IR absorption spectrog Retention time chromatograph employing an IR absorption spectrog

1975-02-20

1977-08-23

Smith, Alfred S.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, G01J 100

Patent

active

040442578

ABSTRACT:
Sample material of retention time peaks of a chromatograph are exposed to infrared radiation at first and second wavelengths and the absorption of the infrared energy by the sample peak is measured. The measured infrared absorption at the first and second wavelengths is correlated with the retention time of the sample peak as an identification of the sample material. In addition, overlapping retention time peaks are resolved by detecting the change in the ratio of the infrared absorption at the first and second wavelengths as a function of retention time for a given peak.

REFERENCES:
patent: 3279308 (1966-10-01), Bartz et al.
patent: 3638396 (1972-02-01), Lovelock
patent: 3700890 (1972-10-01), Kreuzer
patent: 3727050 (1973-04-01), Kerr
patent: 3728540 (1973-04-01), Todd et al.
patent: 3766380 (1973-10-01), Menzies
patent: 3820901 (1974-06-01), Kreuzer
patent: 3860393 (1975-01-01), Campen
patent: 3896312 (1965-07-01), Brown et al.
patent: 3902068 (1975-08-01), Wood

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