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An accurate and rapid systematic analysis of ordinary silicate rocks was studied with a column of an ion exchange resin (Amberlite IR-120). A powdered rock sample was decomposed by the usual method of Berzelius. Iron was extracted from 6 n hydrochloric acid solution into ether before chromatographic separation Metal ions absorbed on the column are eluted as follows : With 0.4 n HC1 Na and K, with 0.8 n H2SO4 Ti(IV), with 0.8 n HCl Mg, Mn(II), and Ca, and with 4 n HCl Al are eluted successively. A complete analysis of an ordinary rock sample can be carried out in only 3 days by this method.
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OKI et al. (1962) studied this question.
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