Matrix isolation apparatus with extended sample collection capab

Details Matrix isolation apparatus with extended sample collection capab Matrix isolation apparatus with extended sample collection capab

1985-03-01

1987-08-25

McGraw, Vincent P.

Optics: measuring and testing

With sample preparation

250338, 250341, 250352, 356244, 422 89, G01N 122, G01N 2101, G01N 2155

Patent

active

046889361

ABSTRACT:
A gas-sample collection device provides for the matrix isolation of increased amounts of a sample material for spectrographic analysis from a gas chromatographic separation. The device includes an evacuated sample collection chamber containing a disc-like specular carousel having a generally circular lateral surface upon which the sample is deposited in an inert gas matrix for infrared (IR) spectral analysis. The evacuated sample chamber is mounted in a fixed manner and is coupled to and supports a rotating cryostatic coupler which, in turn, supports the specular carousel within the collection chamber. A rotational drive system connected to the cryostatic coupler provides for its rotational displacement as well as that of the sample collecting carousel. In addition, rotation of the cryostatic coupler effects vertical displacement of the carousel to permit the collection of an extended sample band in a helical configuration on the entire lateral surface of the carousel. The various components of the carousel's angular/linear displacement drive system are located exterior to the cryostatic coupler for easy access and improved operation. The cryostatic coupler includes a 360.degree. rotary union assembly for permitting the delivery of a high pressure working fluid to the cryostatic coupler in a continuous flow manner for maintaining the specular carousel at a low temperature, e.g., 10.degree.-20.degree. K., for improved uninterrupted gas sample collection and analysis.

REFERENCES:
patent: 4158772 (1979-06-01), Reedy
patent: 4594226 (1986-06-01), Reedy

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