GB/T 1 2008.7 - 2025 "Plastics, polyurethane production of polyether polyols, Part 7: Determination of alkaline substance content" is an important national standard in the field of polyurethane production. The standard specifies in detail the determination method of alkaline substance content in polyether polyols for polyurethane production, clarifies the determination principle of potential Titrimetric method, etc., standardizes the preparation of instruments, reagents and solutions required for the test, elaborates the sample prepative and titration operation steps, and gives the result calculation and precision requirements. The implementation of this standard provides a scientific basis for accurately detecting the alkaline substance content of polyether polyols, ensuring the mass of polyurethane products, and promotes industry standardization production.