GB/Z 38062-2019 is a guiding technical document for the specific surface area testing of graphene materials in the field of nanotechnology, which is suitable for graphene materials with oxidation graphite thermal disbonding, chemical intercalation disbonding and mechanical disbonding. The standard aims at the limitations of traditional gas adsorption BET method to test graphene. Methylene blue adsorption method is used to avoid graphene sheet agglomeration in a liquid phase system, and full adsorption is achieved by molecular conjugation. The standard clarifies the core content of test principle, Reagent, sample preparation, result calculation, etc. The test requires the use of ultraviolet-visible spectrophotometer, Analytical Balance, constant temperature water bath Shaker and other instruments, which provides a reliable basis for accurately determining the true specific surface area of graphene and ensuring material quality and application.