The GB/T 44242-2024 standard specifies the technical requirements for the determination of inorganic halides and formic acids in hydrogen for automotive use in proton exchange membrane fuel cells using Ion chromatography. The standard details the required reagents, materials and instrumentation equipment, specifying the test steps including sample collection, handling, instrument setup and Data analysis. Its determination range is 0.025 μmol/mol to 0.5 μmol/mol, and is designed to ensure that the purity of hydrogen meets the standards for use in fuel cells. The standard also covers quality control procedures to ensure the accuracy and Repeatability of test results. Precautions include the safety of hydrogen, and users need to develop appropriate safety measures before use.