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This standard replaces GB 19191-2003 Food Additive - Natural Vitamin E.
The following main changes have been made with respect to GB 19191-2003:
——The standard name is revised as National Food Safety Standard - Food Additive - Vitamin E;
——The types of tocopherols contained in vitamin E are modified;
——Refractive index requirements are added;
——Requirements of absorption coefficient indexes are added.
National Food Safety Standard
Food Additive - Vitamin E
1 Scope
This standard is applicable to products made from the natural vitamin E extracted from the by-products of natural edible vegetable oils or synthetic vitamin E by incorporating with edible vegetable oils. This standard is applicable vitamin E containing d-α-tocopherol, dl-α-tocopherol, d-α-tocopheryl acetate, dl-α-tocopheryl acetate, d-α-tocopheryl acid succinate, dl-α-tocopheryl acid succinate, d-α-tocopheryl acetate concentrate, and concentrate of mixed tocopherols.
2 Chemical Name, Molecular Formula, Structural Formula and Relative Molecular Mass
The radical groups R1, R2, R3 and R4 corresponding to structural formulae of d-α-tocopherol, dl-α-tocopherol, d-α-tocopheryl acetate, dl-α-tocopheryl acetate, d-α-tocopheryl acid succinate, dl-α-tocopheryl acid succinate, d-α-tocopheryl acetate concentrate and concentrate of mixed tocopherols are as shown in Table 1.
Table 1
Type Substituting group R1 Substituting group R2 Substituting group R3 Substituting group R4
d-α-tocopherol: 430.71 (as per 2013 international relative atomic mass);
dl-α-tocopherol: 430.71 (as per 2013 international relative atomic mass);
d-α-tocopheryl acetate: 472.75 (as per 2013 international relative atomic mass);
dl-α-tocopheryl acetate: 472.75 (as per 2013 international relative atomic mass);
d-α-tocopheryl acid succinate: 530.79 (as per 2013 international relative atomic mass);
dl-α-tocopheryl acid succinate: 530.79(as per 2013 international relative atomic mass).
3 Technical Requirements
3.1 Sensory requirements
Sensory requirements shall be in accordance with those specified in Table 2.
Table 2 Sensory Requirements
Item Requirements Inspection method
Color and lustre d-α-tocopherol: red brown to pale yellow Place a proper amount of specimen into a white porcelain dish or transparent beaker, and then observe its color and lustre as well as state under natural light.
d-α-tocopheryl acetate: colorless to yellow
d-α-tocopheryl acetate concentrate: light brown to pale yellow
d-α-tocopheryl acid succinate: white to off-white
dl-α-tocopheryl acid succinate: white to off-white
Concentrate of mixed tocopherols: red brown to pale yellow
Character d-α-tocopherol: clear oily liquid
d-α-tocopheryl acetate: clear viscous oily liquid, solidify when keeping still and melt at about 25℃
Contenta, ω/% Total tocopherols ≥50.0 ≥70.0 ≥70.0 96.0 ~ 102.0. ≥50.0 A.3 of
Annex A
Where,
d-α-tocopherol ≥ 95.0 —
d-β-, d- γ- and d–ð-tocopherols — ≥ 80.0
pH/mL ≤ 1.0 ≤ 0.5 18.0 ~ 19.3 ≤ 1.0 A.4 of
Annex A
Specific rotation ≥ + 24° — + 20° A.5 of
Annex A
Absorption coefficient
(284nm) — 41.0~45.0 — A.6 of
Annex A
Refractive index
— 1.494~1.499 — GB/T 614
Heavy metal (calculated by Pb)/
(mg/kg) ≤ 10 GB/T 5009.74
Note 1: By taking vitamin E complying with this standard as raw material, commercial products of food additive vitamin E shall be made of food raw materials such as food additives complying with quality specification standard like antioxidant, emulsifier, thickener, anti-caking agent and (or) edible vegetable oils; among which, the content in d-α-tocopherol, d-α-tocopheryl acetate, d-α-tocopheryl acetate concentrate, d-α-tocopheryl acid succinate, dl-α-tocopheryl acid succinate, concentrate of mixed tocopherols shall conform to the marking values.
Note 2: Technical indexes of dl-α-tocopherol shall meet the relevant requirements of GB 29942, the technical indexes of dl-α-tocopheryl acetate shall meet the relevant requirements of GB 14756.
a The content may also be expressed in international unit (IU/g), 1mg d-α-tocopherol=1.49 IU, 1mg d-α-tocopheryl acetate=1.36 IU, 1mg d-α-tocopheryl acid succinate=1.21 IU.
Annex A
Inspection Methods
A.1 General requirements
Unless otherwise specified in this standard, the purity of the adopted reagents shall be above analytically pure; the adopted standard titration solutions, standard solutions for impurity determination, preparations and products shall be prepared according to the requirements of GB/T 601, GB/T 602 and GB/T 603; the test water shall be Grade 3 water specified in GB/T 6682. Solutions used in the test are all aqueous solution, unless other solvents are indicated to be used for preparation.
Foreword i 1 Scope 2 Chemical Name, Molecular Formula, Structural Formula and Relative Molecular Mass 3 Technical Requirements Annex A Inspection Methods
