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关于铌的测定有硫氰酸盐—二氯化锡比色法,PAR法,酸性络兰K,溴连苯三酚红,二甲酚橙及氯代磺酚C等方法。近年来,氯代磺酚C广泛被应用到钢铁中铌的比色测定,而且是现有方法中较为灵敏的显色剂。但是氯代磺酚C应用于矿石中铌的测定文献报导很少。本实验针对矿石中某些干扰元素特别对铁的影响作了试验,试验证明:矿样用焦硫酸钾熔融后,酒石酸浸出,在高酸度的盐酸介质中,在EDTA存在下,一定量高价铁无须加入还原
For the determination of niobium thiocyanate - tin dichloride colorimetry, PAR method, acid Cymbidium K, bromine pyrogallol red, xylenol orange and chlorosulfonated C and other methods. In recent years, chlorosulfonamide C has been widely applied to the colorimetric determination of niobium in steel, and it is the more sensitive developer in the existing methods. However, the application of chlorosulfonates C in the determination of niobium in ore has rarely been reported. In this experiment, some disturbing elements in the ore were specially tested for the influence of iron. The experiment proves that after the sample is melted with potassium pyrosulfate, the tartaric acid is leached out in high acidity hydrochloric acid medium in the presence of EDTA, No need to join restore