Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1978-07-27
1980-09-30
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
G01J 330
Patent
active
042252342
ABSTRACT:
A method of flameless atomic absorption analysis in which an element in a sample is measured by vaporizing the sample in a graphite crucible or cuvette and measuring the absorbance of the atomic vapor at a wavelength characteristic of the element. The method includes the steps of (1) successively introducing a preselected number of aliquots of the same sample into the graphite cuvette, (2) thermally pretreating each sample aliquot upon introduction to remove volatile or decomposable substances therefrom, and (3) vaporizing sample remaining in the cuvette for measurement only after performing the predetermined successive number of sample introduction and thermal pretreatment cycles.
REFERENCES:
patent: 3788752 (1974-01-01), Slavin et al.
"Controlled Atmosphere Discontinuous Semiautomatic Dispenser for Carbon Rod Atomizer"; Sacchetti et al.; Analytical Chemistry, vol. 48#8 Jul. 1976 pp. 1175-1177.
Ruberg Wolfgang
Schmider Paul
Beckman Instruments GmbH
McGraw Vincent P.
Meads Robert R.
Shewmaker John R.
Steinmeyer R. J.
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