GB/T 20405.1-2006 Focusing on the determination of the pH value of polymer-based absorbent materials in urine absorbers for incontinence. For such materials, the standard specifies a detailed sample preparation process, and the solution for testing is obtained by a specific method. The pH value of the solution is accurately determined by appropriate instruments, and the operation details, measurement times and result processing methods are clarified. The standard provides a key basis for evaluating the mass of polymer-based absorbent materials, ensuring that their pH value meets the requirements of safety and comfort in use, and ensuring the mass of urine absorbers for incontinence. It is widely used in related production and testing links.