Determination of Fluoride in Soils by a Nonfusion Distillation pF Method

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Abstract
The nonfusion distillation pF method has been successfully applied to the determination of fluoride in soils. The fluoride is distilled from the soil sample with HClO4 and measured in the buffered distillate by an ion-specific fluoride electrode without any ashing or other separation operations. Soils or mud containing fluoride in the range between 1 to 700 ppm can be directly analyzed with a standard error of less than 1.5%.