GB/T 9345.1 - 2008 prescribes a general method for the determination of ash content in plastics. The standard applies to a variety of plastics, detailing sample collection, preparation and equipment requirements, such as high temperature furnace, crucible, etc. Standardize the operation process, covering the control of sample burning temperature and duration to ensure accurate determination. Also clarify the calculation and representation of results. The ash content of plastics affects its performance and mass. This standard provides a unified measurement standard for the plastics industry, helps production, testing and other links to control mass, promote the standardization of plastic mass testing, and improve the overall level of the industry.