GB/T 26986-2011 The Karl Fischer Potential Titrimetric method is used to determine the water content of crude oil, which is suitable for all kinds of crude oil samples. The method is based on the quantitative reaction between Karl Fischer reagent and water. In the process of Potentiometric titration, poten-tiometry, the reaction endpoint is determined by monitoring the change of potential, and then the water content in crude oil is calculated. The standard specifies the required instrument accuracy requirements such as Potentiometric titrator, and specifies the preparation method of Karl Fischer reagent. Detailed description of the collection, processing and injection of crude oil samples The main points of operation of the instrument. Standardized titration process, according to this standard can accurately determine the water content of crude oil, and provide key data for crude oil trade Measurement and refining process control.