Международный стандарт ISBT (International Society of Beverage Technologist)
% Purity | 99.9% min |
Moisture | 20 ppm v/v max |
Oxygen | 30 ppm v/v max |
Carbon Monoxide | 10 ppm v/v max |
Ammonia | 2.5 ppm v/v max |
Nitric Oxide/Nitrogen Dioxide | 2.5 ppm v/v each max |
Non-volatile Residue (NVR) | 10 ppm w/w max |
Non-volatile Organic Residue (NVOR) | 5 ppm w/w max |
Phosphine | 0.3 ppm v/v max |
Total Volatile Hydrocarbons (THC as Methane) | 50 ppm v/v max |
Total Non-methane Hydrocarbons (TNMHC) | 20 ppm v/v max |
Acetaldehyde | 0.2 ppm v/v max |
Aromatic Hydrocarbon Content (as benzene) | 20 ppb v/v |
Total Sulfur Content (less SO2) | 0.1 ppm v/v |
Sulfur Dioxide | 1 ppm v/v max |
Odor of Solid CO2 (Snow) | no foreign odor (без вкуса) |
Appearance in Water | no color or turbidity |
Odor & Taste in Water | no foreign odor or taste |