GB/T 44790-2024 "Nanotechnology, polystyrene nanofiber solid phase extraction performance detection method" specifies the use of polystyrene (PS) nanofiber solid phase extraction technology to detect the performance of target compounds, which is suitable for the performance evaluation of related nanomaterials in chemical analysis. This standard describes in detail the standard Linear dispersion drawing of rhodamine B as an example compound, the activation step of the solid phase extraction column, the extraction rate test, and the determination of in-batch Repeatability and inter-batch conformity. High performance liquid chroma-tography, HPLC is used to analyze the extraction and elute samples to ensure the accuracy and Stability of the detection data. This standard provides a scientific basis for the application of nanofiber materials in chemical separation and analysis, and lays a foundation for the research and development, quality control and technical standardization of related products.