GB 31633-2014 English PDF (GB31633-2014)

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GB 31633-2014: National Food Safety Standard -- Food Additives -- Hydrogen
GB 31633-2014
(National food safety standard.Food Additives.Hydrogen)
National Standards of People's Republic of China
National Food Safety Standard
Hydrogen Food Additives
Published 2014-12-24
2015-05-24 implementation
People's Republic of China
National Health and Family Planning Commission issued
National Food Safety Standard
Hydrogen Food Additives
1 Scope
This standard applies to cleavage, the electrolytic production of purified hydrogen food additives.
Molecular formula and relative molecular mass 2
Formula 2.1
H2
2.2 relative molecular mass
2.02 (according to 2011 international relative atomic mass).
3 Technical requirements
3.1 Sensory requirements
Shall comply with the requirements in Table 1.
Table 1 Sensory requirements
Project requires test methods
Color
status
colorless
gas
Colorless transparent pressure hose connected to the cylinder outlet, opening and closing at a short
Valves, and observe the color line in the state of natural light
3.2 Physical and Chemical Indicators
Shall be in accordance with Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Hydrogen (H2, φ) /% ≥ 99.9 Appendix A A.3
Oxygen (O2, φ) /% ≤ 0.001 GB/T 3634.1
Nitrogen (N2, φ) /% ≤ 0.07 GB/T 3634.1
Water (H2O, φ) /% ≤ 0.005 GB/T 5832.2
Appendix A
Testing method
A.1 Warning
The standard test methods used in the high-pressure cylinders, the operation and take appropriate safety precautions.
A.2 Identification Test
Collecting a test gas tube, the glass tube connected to a conduit, ignition gas conduit opening test, pale blue flame, burning dried
Cup liquid bead over the flame appears. Then quickly reversed beaker, adding a small amount of lime to clarify, clarify the lime unchanged cloudy.
A.3 measuring hydrogen (H2) content
Hydrogen (H2) content in volume fraction φ, calculated according to formula (A.1).
φ = 100% - (φ1 φ2 φ3) (A.1)
Where.
--- Press volume fraction phi GB/T 3634.1 Determination of oxygen,%;
The volume fraction of [Phi] 2 --- Press GB/T 3634.1 Determination of nitrogen,%;
[Phi] 3 --- Press GB/T 5832.2 Determination of the volume fraction of water,%.