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一、前言硅铁及球化剂中定硅,最初都是采用重量法,近几年来化驗室內又都广泛采用容量法(氟硅酸鉀容量法),但仍手續很繁杂,操作时間約需3～4小时。我們将容量法加以改进为比色法,取得了良好的效果,不但效率高,而且結果准确度有所改善。試样經硝酸——氟氫酸分解以后,其多余的氟氫酸用硼酸处理然后将溶液注入容量瓶中,稀釋至刻度,吸出一定的数量,按普通比色定硅法进行。
First, the foreword Ferrosilicon and nodulizer in the set of silicon, are initially used gravimetric method, in recent years laboratory widely used capacity method (potassium fluosilicate capacity method), but still very complicated procedures, the operating time of about Need 3 ~ 4 hours. We improved the volumetric method for colorimetry and achieved good results, not only with high efficiency but also with improved accuracy of results. After the sample is decomposed by nitric acid-hydrofluoric acid, the excess hydrofluoric acid is treated with boric acid and the solution is then poured into a volumetric flask, diluted to the mark, sucked up a certain amount, and subjected to the ordinary colorimetric silicon method.