GB/T 22904 - 2023 specifies methods for the determination of total chlorine and organochlorine for paper, Cardboard and pulp. It specifies the required instrumentation and equipment, such as combustion devices, Ion Chromatography and other technical parameters. Detailed sample prepative process, covering the treatment of different forms of paper. Standardized test operations, from sample combustion analysis to detection and quantitative analysis of chlorine elements. Through this standard, the chlorine content in paper products can be accurately determined, providing key data for the industry to control product mass and evaluate environmental impact, helping papermaking enterprises optimize production processes and reduce chlorine pollutant emissions.