GB/T 24167-2009 specifies the method for determining the content of chlorinated toluene in dyestuff products. It specifies the requirements of the equipment required for the experiment, such as Gas Chromatograph and other equipment, and also specifies the reagents used in the experiment. The standard elaborates the processing flow of dyestuff samples in detail. Through specific extraction, separation and other operation steps, chlorinated toluene is extracted from dyestuff samples. Then with the help of instrument analysis, its content is accurately determined. The standard provides key detection means for the dyestuff industry to monitor product mass and ensure environment safety, and helps to promote the green and standardized development of dyestuff production.