GB/T 1672 - 1988 is used to determine the volume resistivity of liquid plasticizers. The standard clearly uses instruments such as high resistivity meters for measurement, specifies the requirements of instrument accuracy, etc. The collection, handling and preparation of liquid plasticizer samples are explained to ensure the stability of the sample state. Detailed specification of the test process, including electrode selection, sample loading, test Environmental temperature and Humidity control, and reading method. Through strict implementation of this standard, the volume resistivity data of liquid plasticizers can be accurately obtained, which provides a key electrical performance basis for its application in plastics processing and other industries, and helps product mass control and process optimization.