GB/T 9345.5 - 2010 is specifically used to determine the ash content of polyvinyl chloride (PVC) in plastics. This standard defines the scope of applicable polyvinyl chloride (PVC) products, specifies the sample collection and processing methods, and specifies the requirements of high temperature furnaces and other equipment. Specify the determination operation process, including key details such as heating temperature and burning time, and clarify the method of calculating and reporting the results. The ash content of polyvinyl chloride (PVC) affects the performance and mass of its products. This standard provides the plastics industry with a unified method for determining the ash content of polyvinyl chloride (PVC), helping enterprises control the mass of products and promote the process of industry standardization.