钒矿中钒的一些测定方法均较繁琐,为适应大量钒的分析,本文提出用磷酸、高氯酸分解样品,同时将钒氧化至五价,然后用亚铁直接滴定的方法。对于难溶于酸的含高硅的样品,则需加入氟化铵或氟化氢分解,对于含大量有机物的样品,也不必经预先灼烧,整个溶矿时间约需10分钟左右,干扰元素的允许量钼、 Some methods for the determination of vanadium in vanadium ore are more cumbersome. In order to adapt to the analysis of a large amount of vanadium, this paper proposes to use phosphoric acid and perchloric acid to decompose the sample and simultaneously oxidize vanadium to pentavalent, then titrate with ferrous iron directly. Dissolved in high-silicon acid-insoluble samples, the need to join the decomposition of ammonium fluoride or hydrogen fluoride, for samples containing large amounts of organic matter without pre-burning, the entire dissolution time of about 10 minutes, interfering elements allow Molybdenum,