Abstract:The method of ion selective electrode for fluoride is a commonly used method to determine the fluorine content. High temperature hydrolysis is the pretreatment method specified in the current standard for determining the fluorine content in coal, but the operation of this pretreatment process is cumbersome and time-consuming. In order to realize the rapid determination of the fluorine content in coal, the pretreatment process is studied. And the coal sample is melted with alkali, which is compared with the high temperature hydrolysis method. As a result, the method has good accuracy and precision. And it has the advantage of simple operation, less interference and rapid batch processing of coal samples, which could meet the rapid detection of imported and exported coal.