Determination of trace inpurities high-purity aluminum oxide by inductively-coupled plasma atomic emission-spectrometry |
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Authors: | T Ishizuka Y Uwamino A Tsuge T Kamiyanagi |
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Institution: | Government Industrial Research Institute, Nagoya Hirate-cho, Kita-ku, Nagoya 462 Japan;Taimei Chemical Industry Co., Ltd., Minami-Minowamura, Kami-Inagun, Nagano Prefecture 399-45 Japan |
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Abstract: | Trace impurities (Ca, Cu, Fe, Mg, Mn, Na and Si) in 99.99% aluminum oxide were determined by inductively-coupled plasma atomic emission spectrometry (i.c.p./a.e.s.). The sample was fused with lithium carbonate/boric acid to determine Ca, Cu, Mg, Mn, Na and Si or dissolved in phosphoric/sulphuric acids to determine iron. Matrix effects on the calibration graphs for each element were studied: for accurate determinations, calibration solutions must contain lithium and boric acid (or aluminium and phosphoric and sulphuric acids for iron). |
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