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镁砂、镁铝砖是我院研制的标准样品.为了分析其中微量钒,可采用氯仿—钽试剂萃取比色法或磷钼钒比色法进行分析.但前者的萃取有机相中出现混浊,需经离心分离后才能进行比色;后者由于灵敏度低,只好采用增量法进行.本文在文献〔1〕的基础上,试验了用极谱催化波测定镁砂、镁铝砖中微量钒的方法.改进了底液条件,作了干扰离子试验.为了消除基体元素镁和少量铝、铁、钛等的干扰,作了微克量钒的氯仿—钽试剂
Magnesia and magnesia-alumina brick are the standard samples developed by our institute.In order to analyze the trace vanadium, it can be analyzed by chloroform-tantalum reagent colorimetric method or phosphorus molybdenum-vanadium colorimetry.However, in the former organic phase, turbidity, After centrifugation to be able to carry out colorimetric; the latter due to low sensitivity, had to use incremental method.In this paper, based on the literature [1], the test polarographic catalytic wave of magnesia, magnesium aluminum brick trace vanadium .Improvement of the bottom liquid conditions, made interference ion test.In order to eliminate the matrix elemental magnesium and a small amount of aluminum, iron, titanium and other interference, made a gram of vanadium chloroform - tantalum reagent