GB/T 2465-1996 provides for the determination of fluorine content in pyrite and sulphur concentrates by ion selective electrode method. The standard details the required instruments, including ion selective electrodes and their supporting measurement devices. Describes the Sample Handling process for preparing pyrite and sulphur concentrates into suitable test solutions. Using the specific response characteristics of fluorine ion selective electrodes to fluoride ions, the measurement of potential values, the fluorine content in the test solution is accurately calculated by the standard Linear dispersion method. This provides a reliable means for mass detection of pyrite and sulphur concentrates, and helps to control product quality and safety in related industrial applications.