GB/T 13198-1991 is a water quality testing standard. High performance liquid chroma-tography, HPLC is used to determine six specific polycyclic aromatic hydrocarbons. Polycyclic aromatic hydrocarbons are carcinogenic and teratogenic, and widely exist in water bodies such as industrial wastewater, threatening ecology and human health. The standard details the process from water sample collection, extraction and enrichment of target substances, to injection of High Performance Liquid Chromatograph separation and detection, and qualitative and quantitative analysis through Retention time and Peak area. The method has high Sensitivity and accuracy, and is suitable for all kinds of water samples. It provides key technical support for water quality monitoring, pollution prevention and control, and protects water environment safety.