GB/T 2432-1981 provides a complexometric titration method for the determination of tetraethyl lead content in gasoline. The standard specifies the type of gasoline applicable, and describes the principle of using complexation reactions to determine tetraethyl lead content. Specifies the reagents and instruments required for the experiment, and details the Sample Handling and titration operation procedures, including solution preparation, titration steps and end point judgment. Through this standard, the tetraethyl lead content in gasoline can be accurately determined, providing key data for gasoline mass control and understanding its impact on the environment and engines. It has played an important role in mass detection in related fields.