Method of sample preparation and apparatus therefor

Details Method of sample preparation and apparatus therefor Method of sample preparation and apparatus therefor

1984-12-03

1986-01-28

Capossela, Ronald C.

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

62331, 981153, 128 1B, 422104, F25B 1900

Patent

active

045662932

ABSTRACT:
A process and apparatus are provided that permits a sample to be cooled below the glass transition temperatures of the components of the sample without forming objectionable frost on the surface of the sample. In accordance with the invention, the sample is confined within a freeze box that is hermetically-sealed from the ambient atmosphere. The freeze box is purged with a dry inert gas until essentially all moisture is removed from the freeze box. The sample then is rapidly cooled to a temperature below the glass transition temperature of the components of the sample before being transferred to an analysis instrument without exposing the sample to ambient atmosphere.

REFERENCES:
patent: 3907389 (1975-02-01), Cox et al.
patent: 4059903 (1977-11-01), Piet et al.
patent: 4324285 (1982-04-01), Henderson
patent: 4356967 (1982-11-01), Lunick

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