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1 Scope
This standard applies to nitrogen production by cryogenic air separation, nitrogen production by pressure swing adsorption, nitrogen production by membrane separation, and food additive nitrogen produced by small special nitrogen generator.
nitrogen
2 Molecular formula and relative molecular mass
1 Molecular formula
N 2
22 Relative molecular mass
201 (according to 2007 international relative atomic mass)
3 Technical requirements
1 Sensory requirements: should meet the requirements of Table 1.
Table 1 Sensory requirements
2 Physical and chemical indicators: should meet the requirements of Table 2.
Table 2 Physical and chemical indicators
Related Links: Food Additive Ammonia Test Method (2)
Food additive ammonia water test method (2)