Flameless spectroscopy

Details Flameless spectroscopy Flameless spectroscopy

1982-07-28

1986-04-08

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

G01J 2174

Patent

active

045808996

ABSTRACT:
A method and apparatus for mounting the tubular furnace of spectroscopic apparatus to enable a protective atmosphere. The furnace is supported within the housing by annular electrodes engaging opposite ends of the furnace and an annular chamber surrounds the furnace for substantially its full length. A gas feed chamber adjacent each end of the furnace communicates with the respective adjacent end of the furnace through the central opening of the adjacent electrode and also communicates with the adjacent end of the annular chamber through passages provided in the adjacent electrode. Gas is fed simultaneously from each feed chamber into each end of the furnace and annular chamber to flow axially therealong for discharge through an opening in a wall of the housing located intermediate the furnace ends. According to another aspect, one of the electrodes forms part of a movable door which is operative to open and close one end of the housing chamber containing the furnace, and resilient means acts between that electrode and another part of the door assembly to resiliently urge the electrode against the furnace in the closed condition of the door. According to yet another aspect, the furnace has part-spherical end surfaces for engaging the electrodes and is counterbored at each end to form a raised sample deposition zone.

REFERENCES:
patent: 4022530 (1977-05-01), Braun et al.
patent: 4098554 (1978-07-01), Huber et al.
Perkin-Elmer Catalog--Atomic Absorption HGA-500 Graphite Furnace--Aug. 1978.

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