WARNING: This standard addresses certain hazardous materials, operations, and equipment, but does not make recommendations regarding safety issues related thereto. Before using this standard, users should establish appropriate safety protection measures and formulate corresponding rules and regulations. This standard specifies the determination of single-ring aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons in diesel oil containing fatty acid methyl esters (FAME) volume fraction less than 5% and in petroleum fractions with a distillation range of 150°C to 400°C by high performance liquid chromatography. and seeking. This standard is applicable to the determination of monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons in diesel oil with a volume fraction of fatty acid methyl ester (FAME) less than 5% and in petroleum fractions with a distillation range of 150°C to 400°C.