Device for collecting and analyzing matrix-isolated samples

Details Device for collecting and analyzing matrix-isolated samples Device for collecting and analyzing matrix-isolated samples

1978-05-02

1979-06-19

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250304, 250341, 250343, 250352, 250373, 356244, G01T 100

Patent

active

041587723

ABSTRACT:
A gas-sample collection device is disclosed for matrix isolation of individual gas bands from a gas chromatographic separation and for presenting these distinct samples for spectrometric examination. The device includes a vacuum chamber containing a rotatably supported, specular carrousel having a number of external, reflecting surfaces around its axis of rotation for holding samples. A gas inlet is provided for depositing sample and matrix material on the individual reflecting surfaces maintained at a sufficiently low temperature to cause solidification. Two optical windows or lenses are installed in the vacuum chamber walls for transmitting a beam of electromagnetic radiation, for instance infrared light, through a selected sample. Positioned within the chamber are two concave mirrors, the first aligned to receive the light beam from one of the lenses and focus it to the sample on one of the reflecting surfaces of the carrousel. The second mirror is aligned to receive reflected light from that carrousel surface and to focus it outwardly through the second lens. The light beam transmitted from the sample is received by a spectrometer for determining absorption spectra.

REFERENCES:
patent: 3287557 (1966-11-01), Bartz
patent: 3508836 (1970-04-01), Polchlopek et al.
Rochkind, "Infrared Analysis of Multicomponent Gas Mixtures", Analytical Chemistry, vol. 39, No. 6, May 1967, pp. 567-574.
Hallam, Vibrational Spectroscopy of Trapped Species, pp. 31-34, John Wiley & Son, 1973.

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