Determination of cadmium in orthophosphoric acid by graphite furnace atomic absorption spectrometry |
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| Authors: | Anne-Marie Wifladt Ragnar Bye Walter Lund |
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| Affiliation: | (1) Department of Chemistry, University of Oslo, P.O. Box 1033, 0315 Oslo, Norway;(2) Department of Pharmacy, University of Oslo, P.O. Box 1068, 0316 Oslo, Norway |
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| Abstract: | Summary Cadmium has been determined in analytical-reagent grade orthophosphoric acids by direct graphite furnace atomic absorption spectrometry with Zeeman background correction. The detection limit was 3.0 pg cadmium, corresponding to 1.0  g/l of cadmium in the concentrated acid. Most of the acids analyzed contained 2–5 g/l of cadmium. The method was checked using electrochemical preconcentration of cadmium, followed by flame atomic absorption spectrometry. |
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