Optical high-pressure transmission cell

Details Optical high-pressure transmission cell Optical high-pressure transmission cell

1989-12-29

1991-03-26

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

356246, G01N 2109, G01N 2105

Patent

active

050031740

ABSTRACT:
Optical high-pressure transmission cells of the type used, for example, for SFC-FTIR, comprise a pressure-resistant housing part with two intersecting bores, one of them forming a fluid passage and the other one forming a light transmission path. The bore forming the light transmission path is provided with inserted windows. There is a demand in infrared spectroscopy, for supercritical fluid chromatography, for particularly pressure-resistant cells of simple design, which demand has not been satisfied heretofore. In the case of the proposed measuring cell, the windows are designed as stepped windows having central cylindrical neck portions engaging the bore serving as a light transmission path so that the chamber is delimited by end faces of the neck portions. Sealing is effected by O-rings.

REFERENCES:
patent: 4588893 (1986-05-01), Vidrine et al.
patent: 4910403 (1990-03-01), Kilham et al.
I. V. Babashov, G. V. Bondarenko, Yu. E. Gorbatyl and M. B. Epel baum, "Cuvette for IR Spectroscopy of Highly Absorbing Fluids at High Pressures and Temperatures." Translated from Pirbory i Tekhnika Eksperimenta, No. 2 (Mar.-Apr., 1970), pp. 215-216.
T. R. Griffiths, F. Lee and R. H. Wijayanoyake, J. Sci. Instrum., (1967), vol. 44, pp. 876-878; "A simple optical cell for measuring the spectra of small amounts of volatile solutions under pressure at temperatures up to 300.degree. C.".
Heinz Fischer, Z. Chem., 1, (1961), pp. 234-245; "Kuvetten fur spektroskopische Untersuchungen im mittleren Infrarot".

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