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随着钢铁工业的发展,越来越多的国家采用海水镁砂作为炼钢炉衬材料。与天然镁砂相比,海水镁砂具有许多优点,但含硼量高却是它的最大的缺点。故必须采取降硼措施以设法生产低硼的高纯镁砂,因而微量硼的测定与控制便成为一个重要的研究课题。以往,这类工作多采用姜黄素、胭脂红酸、次甲基蓝比色法测定微量硼,但测定时须蒸干、过滤、洗涤等繁琐的操作步骤。本文提供了一个采用苯羟乙酸和孔雀石绿萃取吸光光度法测定氧化镁中微量硼的方法。本方法与前述方法相比,具有操作简便、良好的灵敏度和选择性等优点。在室温下和弱酸介质中,硼与苯羟乙酸形成的络阴离子再与孔雀石绿阳离子缔合,生成具有较大疏水
With the development of the iron and steel industry, more and more countries use sea magnesia as the steel lining material. Compared with natural magnesia, magnesia has many advantages, but its high content of boron is its biggest drawback. Therefore, we must take measures to reduce boron in order to try to produce low boron high purity magnesia, and therefore the determination and control of trace boron has become an important research topic. In the past, the use of such work more curcumin, carminic acid, methylene blue colorimetric determination of trace boron, but the determination of steaming, filtration, washing and other cumbersome procedures. This article provides a method for the determination of trace boron in magnesium oxide using phenylglycolic acid and malachite green extraction spectrophotometry. Compared with the previous method, the method has the advantages of simple operation, good sensitivity and selectivity, and the like. At room temperature in a weak acid medium, the complex anion formed by boron and glyoxylic acid associates with the malachite green cation to form a complex anion with larger hydrophobic