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生料中,三氧化二铁的测定一般是用磷酸溶解试样。为了消除灰黑色的有机物微粒,需加入高锰酸钾将其氧化,然后加入盐酸。
Raw materials, the determination of iron oxide is usually dissolved with phosphoric acid sample. In order to eliminate gray-black organic particles, potassium permanganate need to be oxidized, and then add hydrochloric acid.