Abstract: To meet the refined requirements of raw material quality control in the development of manganese ore industry,this paper systematically evaluated and revised the method for the determination of potassium and sodium contents by flame atomic absorption spectrometry(FAAS) specified in the national standard GB/T 14949.7.This revision was developed on the basis of ISO 7969:1985 with joint participation of several laboratories.The revised national standard GB/T 14949.7-2024 mainly involved three key improvements:1)increasing the number of parallel determinations to enhance the precision and reliability of test results;2)clarifying the expression criteria of analytical results to ensure the data accuracy and comparability;3)simplifying and optimizing the preparation procedure of calibration curves to improve the detection efficiency and calibration precision.Multiple rounds of intra-laboratory validation confirmed that GB/T 14949.7-2024 provided accurate determination results and satisfactory precision for manganese ore samples with different content levels.