Centrifugal sample evaporator with direct-heat shield and...

Details Centrifugal sample evaporator with direct-heat shield and... Centrifugal sample evaporator with direct-heat shield and...

2007-02-20

2007-02-20

Warden, Jill (Department: 1743)

Chemistry: analytical and immunological testing

Automated chemical analysis

Utilizing a centrifuge or compartmented rotor

C422S091000, C422S105000, C422S105000, C422S105000, C422S064000, C436S180000, C436S177000

Reexamination Certificate

active

10030611

ABSTRACT:
A sample holder is described, for use in centrifugal evaporators, which permits accelerated evaporation of solvents from samples while ensuring that samples from which evaporation is complete are not damaged by overheating. The sample holder is radiantly heated and has sample containers mounted either directly in it, or in intermediate holders themselves mounted in it. The sample holder imparts heat to the samples and has a cross-sectional area chosen such that no appreciable temperature gradient exists between the radiantly or otherwise heated surfaces of the holder and the sample containers. The sample containers are mounted in the holder at an angle between 35° and 65° to the vertical and orientated such that centrifugal force tends to retain the sample material in the containers. The sample holder may be combined with other holders in a stack, the joints between adjacent holders in the stack being adapted to minimize the temperature difference across them.

REFERENCES:
patent: 4226669 (1980-10-01), Vilardi
patent: 4832678 (1989-05-01), Sheeran
patent: 5167926 (1992-12-01), Kimura et al.
patent: 5217572 (1993-06-01), Guy et al.
patent: 5356365 (1994-10-01), Brierton
patent: 5431620 (1995-07-01), Schenck

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