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近年来,在磷的快速分析中,萃取法(包括乙醚,乙酸乙酯,乙酸戊酯等溶剂萃取的钼蓝法)已被广泛采用。由于所用溶剂并不是磷的选择性萃取剂,若钢中共存的砷超过0.1%,就会产生不良影响,此时,砷钼酸与磷钼酸被一同萃入有机相并还原成钼蓝,使磷的分析结果偏高。因而,在钢铁分析中如何消除砷对磷的干扰,以及寻找砷、磷萃取分离及测定的方法是一个有意义的课题。砷并不是钢铁的例行分析项目。三十年前,的方法和最近美国材料试验学会的方法
In recent years, the extraction method (molybdenum blue method including solvent extraction of ethyl ether, ethyl acetate, amyl acetate and the like) has been widely adopted in the rapid analysis of phosphorus. As the solvent used is not a selective extractant of phosphorus, if coexisting arsenic in the steel exceeds 0.1%, adverse effects will occur. At this time, arsenic molybdate and phosphomolybdic acid are both extracted into the organic phase and reduced to molybdenum blue, The result of phosphorus analysis is high. Therefore, it is a significant issue how to eliminate the interference of arsenic and phosphorus in the steel analysis, as well as to find out the methods of arsenic and phosphorus extraction and separation and determination. Arsenic is not a routine steel analysis project. Thirty years ago, the methods and methods of the recent American Society for Testing Materials