HG/T 4164-2010 "Determination of pH Value of Spinning & weaving Dyeing and Finishing Auxiliaries" stipulates the determination method of pH value of Spinning & weaving dyeing and finishing auxiliaries. The standard specifies the requirements of equipment and reagents, standardizes the preparation of samples, the determination steps and the calculation process of results, and explains the key links such as temperature control and calibrate in the test process. It provides a unified technical specification for the accurate determination of pH value of Spinning & weaving dyeing and finishing auxiliaries, and helps to control the mass of auxiliaries and ensure the stability of dyeing and finishing processes.