Determination of copper, lead, cadmium, zinc, and iron in calcium fluoride and other fluoride-containing samples by means of direct solid sampling GF-AAS |
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| Authors: | W. Schrön A. Detcheva B. Dreßler K. Danzer |
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| Affiliation: | (1) Friedrich Schiller University, Dept. Inorganic and Analytical Chemistry, D-07743 Jena, Germany, DE;(2) Bulgarian Acad. Science, Inst. General and Inorganic Chemistry, BG-1113 Sofia, Bulgaria, BG |
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| Abstract: | Direct solid sampling graphite furnace AAS (SS-GF-AAS) provides an advantageous alternative to the conventional AAS which requires wet digestion of the samples. This method is suitable for trace element determination in calcium fluoride and other fluoride-containing samples. Matrix effects were studied by using calibration standards, certified reference materials with different matrices and by means of three-dimensional calibration. 3D calibration is suitable for selection of calibration samples for more reliable analyses. Cu, Pb, Cd, Zn, and Fe were determined by means of calibration with variation of sample weight using certified reference materials and suitable fluoride-containing calibration samples. Received: 25 July 1997 / Revised: 15 December 1997 / Accepted: 20 December 1997 |
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