Trace analysis of gallium arsenide by selective evaporation of the matrix with bromine vapours |
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Authors: | Ernest Beinrohr |
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Institution: | (1) Department of Analytical Chemistry, Slovak Technical University, Radlinského 9, CS-812 37 Bratislava, Czechoslovakia |
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Abstract: | Gallium arsenide samples are analyzed by graphite furnace AAS after the selective evaporation of the matrix elements as bromides with bromine vapours in a simple apparatus. The evaporation step is carried out at 280–300 ° C and it is accomplished for 0.5 g sample within 1 h. Reproducibilities of 5 to 20% were obtained. Detection limits (3 s, in ng/g) are 20 (Fe), 5.0 (Ca), 3.0 (Mg), 2.0 (Ni, Cu), 1.0 (Al), 0.5 (Pb, Co), 0.2 (Mn, Cr). |
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Keywords: | gallium arsenide trace analysis matrix evaporation flameless AAS |
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