GB/T 33648-2017 Test method for identification and determination of specific non-regular additives in motor gasoline—Infrared spectroscopic method

GB/T 4756-1998 Petroleum liquids—Manual sampling GB/T 4756-2015 Method for manual sampling of petroleum liquids GB/T 6683-1997 Petroleum products—Determination of precision data in relation to methods of test GB/T 6683.1-2021 Petroleum and related products—Precision of measurement methods and results—Part 1:Determination of precision data in relation to methods of test GB/T 6683.3-2023 Petroleum and related products—Precision of measurement methods and results—Part 3:Monitoring and verification of published precision data in relation to methods of test GB/T 21186-2007 Fourier transform infrared spectrometer GB/T 6683.2-2025 Pertroleum and related products—Precision of measurement methods and results—Part 2:Interpretation and application of precision data in relation to methods of test GB/T 6683.4-2026 Petroleum and related products—Precision of measurement methods and results—Part 4:Use of statistical control charts to validate 'in-statistical-control' status for the execution of a test method standard in a single laboratory GB/T 21186-2026 Fourier transform infrared spectrometers