偶氮类化合物是钒的重要显色试剂,但是用铍试剂Ⅲ光度测定钒的方法尚未见报导。作者在研究钛的铍试剂Ⅲ多元络合物时发现,钒和铍试剂Ⅲ的反应灵敏,而且络合物形成后加入EGTA对吸光度无影响。本文对这一反应作了进一步研究,并拟定了铁矿石中钒的测定方法,获得了良好的结果。 Azo compounds are important chromogenic reagents for vanadium, but the method of spectrophotometric determination of vanadium with beryllium reagent III has not been reported. The authors found that the reaction of vanadium with beryllium reagent Ⅲ was sensitive when the titanium beryllium reagent Ⅲ complex was found, and the addition of EGTA did not affect the absorbance after the complex was formed. In this paper, the reaction was further studied, and the determination of the determination of vanadium in iron ore, obtained good results.