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This paper shows the Food Grade CO2 standard of the International Society of Beverage Technologists (BST) and points out that the total sulfur, benzene and total hydrocarbon specifications are the most difficult to achieve. The paper describes in detail a purification process for Food Grade CO2, developed by Hubei Research Institute of Chemistry and Hangzhou Kuaikai Company, and its main industrial applications. As determined by the Atlantic Analytical Laboratory and the Chemical Gas Supervision and Test Center, the finished product CO2 totally satisfies all 20 items of the IBST Food Grade CO2 standard and has been approved by Coca Cola (China) Company and by Pepsi-Cola Company.