A High Speed Method of Continuous Background Correction in Atomic Absorption Spectrometry. II. Assessment of Method

Authors: Donnelly, T. H.; Eccleston, A. J.

Source: Applied Spectroscopy, Volume 29, Issue 2, Pages 129-206 (March/April 1975) , pp. 154-158(5)

Publisher: Society for Applied Spectroscopy

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Abstract:

The need for background correction in atomic absorption spectrometry (AAS), particularly when graphite furnaces are used to generate the atomic vapor, is discussed. It is shown that a Beckman hydrogen arc lamp is suitable as a continuum source from the point of view of noise, extent of its useful broad band absorption, and light intensity for background-corrected absorption (BCA) measurements over the wavelength range examined (200 to 460 nm). The standard method of determining tin present in rock samples as cassiterite, by extraction as the volatile tin iodide, was examined by flameless AAS with BCA. The method corrects for the large nonatomic absorption present, it is rapid, and it enables easier examination of solutions containing low concentrations of tin (detection limit for a 1 g starting sample is ∼1 μg tin).

Keywords: Atomic absorption; Continuous background correction; Graphite rod atomizer

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370275774455310

Affiliations: Baas Becking Geobiological Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 378, Canberra City, A.C.T. 2601, Australia, and Division of Applied Chemistry, Commonwealth Scientific and Industrial Research Organization, P.O. Box 4331, Melbourne, Victoria, 3001, Australia

Publication date: March 1, 1975

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