"SL/T 788.2-2019 Water Quality, Determination of Volatile Phenols" is one of the important standards in water quality analysis. Continuous flow analysis and Spectrophotometric method, spectrophotometry are used to determine the content of volatile phenols. This standard is applicable to the fields of environment monitoring, water quality assessment and pollutant discharge monitoring. By measuring the concentration of volatile phenols, the organic matter load in water bodies and the degree of water pollution can be evaluated. The standard specifies in detail the collection and pretreatment methods of samples, the operation requirements of analytical instruments, measurement procedures and data processing methods. The implementation of this standard can ensure the accuracy and comparability of measurement results, and provide scientific basis and technical support for protecting water resources and the environment.