抄録
Practicable and simple method for the determination of fluorine in soil containing silicon and aluminum was designed and a convenient method was established as follows : One part of the soil sample is fused with 5 parts of a mixture of sodium carbonate and zinc oxide (2 : 3, w/w), at 600 to 1000°, and the fused material is suspended and leached with water. Fluorine in the suspension is distilled directly from sulfuric acid solution at 135-145°. In this method, fluorine can be constantly and quantitatively recovered by the fusion temperature of 600 to 1000°. The procedure is rapid and has a high reproducibility.
