This comprehensive analysis program is designed to meet all ISBT testing guidelines for beverage grade CO₂ . Sampling can be performed using customer supplied DOT or TPED high pressure cylinders filled with liquid CO₂ , or by renting or purchasing small, (ex. 1L) ALI passivated DOT / TPED sampling cylinders. Liquid CO₂ samples must be properly shipped as “Hazmats” by hazmat qualified shipping staff and using a hazmat qualified courier.