The GB/T 3884.5-2012 standard specifies a method for the determination of fluorine content in copper concentrates, which is suitable for the determination of fluorine content in the range of 0.010% to 0.50%. The method melts the sample by sodiumhydrate and leaches it with water to separate fluorine from Miscellaneous elements such as iron, copper, and lead. Then, in a sodium citrate-triethanolamine medium of pH 6.5~ 7.0, potentiometric measurement is carried out using a saturated Calomel electrode and a fluorine Ion selective electrode to determine the fluorine content with an electrode potentiometer. The standard details the requirements and processing steps of the reagents to ensure the accuracy and Reliability of the measurement results.