Graphite probe and electrothermal atomizer including such a prob

Details Graphite probe and electrothermal atomizer including such a prob Graphite probe and electrothermal atomizer including such a prob

1986-11-05

1988-01-26

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356244, G01N 2174

Patent

active

047213876

ABSTRACT:
A graphite probe for an electrothermal atomizer comprises a thick stem portion (3) carrying a thin head portion (2) which meets the stem portion (3) at a step (4) which, in operation, is located outside a cuvette (6) adjacent to a slot (7) through which the probe head (2) is inserted into the cuvette (6). A sample deposition aperture (8) is provided in the cuvette (6) through which a sample can be deposited via a dosing tube (9) on a part (10) of the head portion (2) of the probe. The part (10) of the head portion (2) is separated from the rest of the probe by a ridge (5) which extends across the width of the head (2). The ridge (5) prevents liquid samples having a low surface tension from spreading towards the step (4) and has a mass such that its temperature increase matches that of the rest of the head portion (2) thus reducing the production of double peaks in the measured absorption.

REFERENCES:
patent: 4639136 (1987-01-01), Morton
patent: 4657389 (1987-04-01), Littlejohn

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