FZ/T 50010.5-2023 "Pulp for regenerated cellulose fiber, Determination of ash content" is the Chinese Spinning & weaving industry standard, which stipulates the method for determining the ash content in pulp for regenerated cellulose fiber. The standard is applicable to the determination of ash content in pulp for regenerated cellulose fiber, and provides specific test steps and calculation methods. The standard was issued by the Ministry of Industry and Information Technology, issued on April 21, 2023, and implemented on November 1, 2023, replacing the FZ/T 50010.5-1998 standard. The drafting unit includes a number of related enterprises and institutions, and is managed centrally by the China Spinning & weaving Industry Federation.