Atomic absorption spectrophotometric method and apparatus

Details Atomic absorption spectrophotometric method and apparatus Atomic absorption spectrophotometric method and apparatus

1990-05-02

1991-08-27

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With background radiation comparison

356312, 356315, G01J 310, G01J 342, G01N 2172

Patent

active

050429469

ABSTRACT:
An atomic absorption spectrophotometric apparatus, which includes a first light source emitting plural specific spectra by changing the current of the first light source into relatively small and large currents, a second light source emitting a continuous spectrum, an atomizer for atomizing a sample, a beam combiner for directing the spectrum emitted from the first light source and the second light source to the atomized sample, a detector for detecting the plural specific spectra and the continuous spectrum which passes through the atomized sample, and a computer for obtaining spectrum absorbances of the plural specific spectra and the continuous spectrum from the outputs of the detector and obtaining a concentration of a specific element on the basis of a combination of the spectrum absorbances. As the sample concentration is calculated from the two spectrums and the continuous spectrum, the background is corrected and at the same time the measuring range of the concentration is expanded so as to obtain the concentration with high accuracy.

REFERENCES:
patent: 3825344 (1974-07-01), Bonne
patent: 4341470 (1982-07-01), Parker et al.
patent: 4462685 (1984-07-01), Smith, Jr. et al.
Japanese publication, "Bunkoh Kenkyu" (vol. 35, No. 1, edited by Hidehiro Daidohji, 1986, pp. 42-49).

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