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一般合金钢中钼的炉前测定需8～10分钟,我们试验了用过氯酸—盐酸溶解试样,热溶液显色的方法,使分析时间缩短为2(1/2)～3分钟(不包括称样时间),而且准确度及重现性均符合要求。试剂:①硫酸—硫酸钛混合液:取二氧化钛2.6克于烧杯中,加入硫酸铵16克,浓硫酸80毫升,加热溶解温度保持200～220℃),冷却,注入600毫升水中,过滤,在滤液中再加入浓硫酸90毫升,用水稀至1升。
General alloy steel molybdenum furnace before the test takes 8 to 10 minutes, we tested the use of perchloric acid - hydrochloric acid dissolved samples, hot solution color method, the analysis time is reduced to 2 (1/2) ~ 3 minutes ( Not including the sample time), and the accuracy and reproducibility meet the requirements. Reagents: ① sulfuric acid - titanium sulfate mixture: Take 2.6 grams of titanium dioxide in a beaker, add 16 grams of ammonium sulfate, concentrated sulfuric acid 80 ml, heated to maintain the temperature was maintained at 200 ~ 220 ℃), cooled and poured into 600 ml of water, filtered, Then add 90 ml of concentrated sulfuric acid, dilute to 1 liter with water.