GB/T 7717.9-1994 is used to determine the total cyanide content in industrial acrylonitrile, using the Titrimetric method. It is suitable for all kinds of industrial acrylonitrile products, and describes the principle of determining the total cyanide content through specific titration reactions. Specify the equipment required for the experiment, such as Burette, and reagents. Detail the processing steps of the sample, including sample collection, dissolve, etc., and then introduce the titration operation process, covering the addition method of the titrant and the determination method of the titration endpoint. According to this standard, the total cyanide content of industrial acrylonitrile can be accurately determined, providing key data support for product mass control and safe production.