This standard specifies the instrumental requirements and analytical methods required when analyzing chemical reagents using Gas chromatography, CG. Applicable to the determination of organic chemical reagents whose main components and impurities contain volatile components. Specifies the scope and purpose of application of Gas chromatography, CG for chemical reagents. Several necessary standard documents are cited, ensuring the accuracy and Reliability of analytical methods. Defines the terms used in this standard, including asymmetry factor and effective plate height. Describes the physicochemical principles of sample separation in gas phase Chromatography Column, including the migration rate difference of components and data processing methods. The standard is applicable to the technical requirements of the laboratory and industry when using Gas chromatography, CG in analytical chemical reagents, and provides important guidance for the accurate determination of chemical reagents.