将超声萃取与离子选择性电极浓度直读法联用,快速测定了面粉、大米、饲料和豆浆等样品中的微量氟。方法简便、快速直观、操作简单,实用性强,利于普及推广。样品测定的 RSD为=0.6％～2.8％（n=5）,加标回收率为94.3％～99.5％,结果令人满意。与文献[1]比较,分析速度提高近百倍,适用于批量样品的快速测定。 Ultrasound extraction and ion-selective electrode concentration direct reading method combined with rapid determination of flour, rice, feed and soy milk and other samples of trace fluoride. The method is simple, quick and intuitive, easy to operate, practical, and conducive to popularization and promotion. The RSD of the sample was 0.6% ~ 2.8% (n = 5), and the recoveries were 94.3% ~ 99.5%. The results were satisfactory. Compared with the literature [1], the analysis speed is increased nearly 100 times, which is suitable for the rapid determination of batch samples.