Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1982-10-12
1985-08-27
Shaw, C. C.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
219275, 219271, G01N 2116, G01J 330
Patent
active
045375062
ABSTRACT:
The atomizer of the present invention serves for generating free atoms and an atomic cloud by heating a sample for analysis. The device includes a preferably tubular cuvette for receiving the sample, and the cuvette consists either of a basic body of carbon, which is enveloped by a pyrolytic graphite layer, or only of pyrolytic graphite layers. An electric supply unit for Joule heating the cuvette is in contact with the cuvette by contact members. In order to achieve a radial temperature distribution in the cuvette such that the inner wall of the cuvette is at an essentially higher temperature than the outer wall of the cuvette, the contact surfaces of the cuvette and the contact surfaces of the contact members contact each other in such a manner that the electric current applied during operation of the atomizer preferably flows through the inner wall of the cuvette.
REFERENCES:
patent: 4111563 (1978-09-01), Tamm
patent: 4204769 (1980-05-01), Lersmacher
Chakrabarti, C. L., "Capacitive Discharge Heating in Graphite Furnace . . . ", Anal. Chem., Jan. 1980, 52, No. 1, pp. 167-176.
Batley, Graeme E., "Determination of Heavy Metals . . . ", Analy. Chem., _vol. 49, No. 13, Nov. 1977, pp. 2031-2035.
Massmann, H., "Vergleich von Atomabsorption . . . ", Spectrochimica _Acta, 1968, vol. 23B, pp. 215-226.
Connor Philip J.
Lersmacher Bernhard
Wassall Michael P.
Miller Paul R.
Shaw C. C.
Walberg Teresa J.
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