论文部分内容阅读
硅酸盐岩石中FeO的测定,多数采用HF-H_2SO_4铂坩埚快速溶矿法,方法简便、快速,缺点是Fe~(2+)在溶矿过程中易被空气氧化而使结果偏低。近年来国外有人使用聚丙烯塑料瓶瓶口封闭水浴溶矿法测定FeO,该法在称样前先由气体钢瓶向空塑料瓶中充入一定量的CO_2气体,装样后加入HF-H_2SO_4混合酸进行封闭溶矿,一定程度地提高了分解试样的能力和避免了Fe~(2+)的氧化。国内也有人使用过以聚四氟乙烯为内衬的铝压热器封闭溶解法或用聚丙烯
The determination of FeO in silicate rocks mostly adopts the HF-H 2 SO 4 platinum crucible rapid dissolution method. The method is simple and rapid. The disadvantage is that Fe 2+ can be easily oxidized by air in the process of ore dissolution, resulting in low results. In recent years, some foreign countries use polypropylene bottle closed mouth water bath dissolved ore method for the determination of FeO, the law before the sample from the gas cylinder into the empty plastic bottle filled with a certain amount of CO 2 gas, after loading sample added HF-H_2SO_4 mixed The acid was closed and dissolved, which improved the capability of decomposing the sample to a certain degree and avoided the oxidation of Fe ~ (2+). Some people have used domestic polytetrafluoroethylene lined aluminum autoclave closed dissolved method or polypropylene