Determination of chromium in gallium arsenide by electrothermal atomic absorption spectrometry |
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Authors: | M. Taddia P. Lanza |
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Affiliation: | Istituto Chimico “G. Ciamician”, Università di Bologna, 40126 Bologna Italy;Istituto di Tecnologie Chimiche Speciali, Università di Bologna, 40136 Bologna Italy |
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Abstract: | The sample is decomposed with 50% (v/v) aqua regia and the diluted solution is injected into the graphite furnace. The temperature program developed minimizes non-specific background signals, so that correction is not required. For a 100-mg sample, the 3σ detection limit is 70 ng Cr g?1. The relative standard deviation of the overall procedure is 5–7%. |
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