GB/T 7463-2008 The acid content Titrimetric method (improved Schoenfeldt method) is used to determine the calcium soap dispersion power of surfactants. It is suitable for all kinds of surfactant products. The method uses acid titration to disperse calcium soaps. The alkali bound to undispersed calcium soaps is measured according to the amount of acid. The standard specifies the required instruments, such as Burette, etc., and specifies the preparation of reagents. Detailed description of test solution preparation, calcium soap preparation and titration operation process, including titration conditions and endpoint judgment. According to this standard, the dispersion power of surfactant calcium soap can be accurately determined, providing key data for product performance evaluation and formulation optimization, and helping surfactant industry production.