Any gases that might enter the food chain are heavily regulated for obvious reasons.

For example, CO2 produced from anaerobic digestion may be sold onto a beverage company for injecting bubbles into a drink so strict test specifications apply to purity testing.

Food packaging requires blanketing with inert gases such as Nitrogen to help extend shelf life and preserve products and Breathing air used by firefighters, pilots and divers has to be of sufficient purity to ensure safe use.

SGS GAS test to all Industry Standards such as;

International Society Beverage Technologists - ISBT

European Industrial Gases Association - EIGA 70/17

Carbon Dioxide Purity

Nitrogen Analysis

Compressed Air