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在硫酸酸性介质中,微量的钒同过氧化氢及二苯胺起反应,形成深兰色的物质,试用这一方法来检出和定量一般方法所不能检出的微量钒,得到了良好的结果。 本法的灵敏度是原来二苯胺法的500倍。 一、试 剂 矾标准溶液:把1.17克偏钒酸铵溶介在
In acidic sulfuric acid medium, a trace of vanadium reacts with hydrogen peroxide and diphenylamine to form a dark blue substance. This method has been used to detect and quantify trace amounts of vanadium that can not be detected by conventional methods. Good results have been obtained . The sensitivity of the law is 500 times the original diphenylamine law. A reagent standard solution of alum: 1.17 grams of ammonium metavanadate dissolved in the solution