This standard specifies the method for the determination of gel content in raw rubber, which is applicable to the determination of gel content in various types of rubber less than 2.0%. However, for the determination of microgels, this standard does not apply. Necessary normative reference documents are cited in the standard, including numerical revision rules and raw rubber sampling methods, etc. The gels are clearly explained in the terms and definitions section. The method summary includes the steps of dissolving the sample in toluene and calculating the gel content. The required reagent is analytical pure toluene, and the instruments used include common laboratory equipment used for analysis. At the same time, the use of this standard requires users to be familiar with laboratory operating procedures and develop their own safety and health procedures to ensure compliance with national regulations.