Simultaneous determination of germanium,arsenic, tin and antimony by molecular emission cavity analysis after hydride generation and gas chromatographic separation |
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Authors: | E. Henden |
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Affiliation: | Chemistry Department, Faculty of Science, University of Ege, Bornova, Izmir Turkey |
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Abstract: | Arsenic (0.1–5 μg), antimony (1–40 μg), tin (0.5–10 μg) and germanium (0.2–10 μg) are determined simultaneously by reduction to their hydrides with sodium tetrahydroborate(III), followed by gas chromatographic separation on a column of 10% E-301 silicone gum rubber on Porapak Q, and measurement of the emissions at 490 nm in an oxygen/hydrogen flame within a cavity. Detection limits for 1-ml samples are 35 ng As, 400 ng Sb, 85 ng Sn and 100 ng Ge. A more sensitive determination of arsenic (0.05–3 μg) and antimony (0.1–5 μg) in binary mixtures is also described; the detection limits are 15 ng As and 40 ng Sb. |
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