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钢中微量硼的此色分析已有许多文献记述,如姜黄素、胭脂红、四羟基蒽醌等。但在发色之前须将硼与钢中其它元素分离,这样操作繁复,不宜于日常生产分析。近年来广泛应用萃取光度法,此法是基于将硼形成BF离子,而后与染料作用生成三元化合物,再用苯或二氯乙烷等有机溶剂萃取。一般钢中常存在的元素无干扰,因此避免了分离手续,操作简单易于掌握,灵敏度也高。试验过应用的染料已有很多,如次甲基兰、甲基硫姜、结晶紫、煌绿等。
This color analysis of trace amounts of boron in steel has been documented in many documents such as curcumin, carmine, tetrahydroxyanthraquinone and the like. However, prior to the color separation of boron and other elements of steel must be separated, so complicated operation, not suitable for routine production analysis. In recent years, extensive use of extraction spectrophotometry, this method is based on the formation of boron ions BF, and then with the dye to generate ternary compounds, and then benzene or dichloroethane and other organic solvents extraction. General elements often exist in the steel without interference, so to avoid the separation procedures, easy to master, sensitivity is high. Dye has been tested for many applications, such as methylan methyl, methyl sulfur ginger, crystal violet, brilliant green and so on.