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以三羟基萤光酮为试剂,以各种表面活性剂为增溶增敏剂测定微量钛在各种测钛方法中灵敏度很高,选择性也较好,故具有较大的实用价值。我们合成了尚未见诸文献的新型三羟基萤光酮-邻氯苯基萤光酮。由于邻位强吸电子基氯的影响,使得用本法测定钛的灵敏度较高,其表观摩尔吸光系数达到2.07×10~5。同时,反应的酸度条件也比水杨基萤光酮法有所提高。本法可用于测定各种合金及地质矿物试样中的微量钛。
To trihydroxyfluorone as a reagent to a variety of surfactant solubilizing agent for the determination of trace titanium in a variety of high sensitivity titanium method, the selectivity is also better, it has greater practical value. We have synthesized a new type of trihydroxyfluorone, o-chlorophenylfluorone, which has not been reported yet. Due to the influence of the ortho strong electron withdrawing chlorine, the sensitivity of this method to the determination of titanium is high, and its apparent molar absorptivity reaches 2.07 × 10 ~ 5. At the same time, the acidity of the reaction conditions than the salicylfluorone method has improved. This method can be used to determine trace amounts of titanium in various alloys and geological mineral samples.