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GB 1903.54-2021: National Food Safety Standard - Food Nutrient Fortifier - Choline Bitartrate
GB 1903.54-2021
GB
NATIONAL STANDARD OF THE
PEOPLE?€?S REPUBLIC OF CHINA
National Food Safety Standard - Food Nutrient
Fortifier - Choline Bitartrate
ISSUED ON: SEPTEMBER 07, 2021
IMPLEMENTED ON: MARCH 07, 2022
Issued by: National Health Commission of the People's Republic of
China;
State Administration for Market Regulation.
Table of Contents
1 Scope ... 3??
2 Chemical name, structural formula, molecular formula and relative molecular
mass ... 3??
3 Technical requirements ... 3??
Appendix A Inspection methods ... 5??
Appendix B Reference infrared spectrum of choline bitartrate standard ... 9??
National Food Safety Standard - Food Nutrient
Fortifier - Choline Bitartrate
1 Scope
This Standard applies to the food nutrient fortifier choline bitartrate which is
obtained through reaction, with trimethylamine, tartaric acid, and ethylene oxide
as the main raw materials, concentration (crystallization), separation and drying.
2 Chemical name, structural formula, molecular
formula and relative molecular mass
2.1 Chemical name
(2-Hydroxyethyl) trimethylamine-tartrate
2.2 Structural formula
2.3 Molecular formula
C9H19NO7
2.4 Relative molecular mass
253.25 (according to the international relative atomic mass in 2018)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall be in accordance with Table 1.
Appendix A??
Inspection methods
A.1 General provisions
The reagents and water that are used in this Standard, when no other
requirements are specified, refer to analytical reagents and grade-III water
which is specified in GB/T 6682. The standard solution, the standard solutions,
preparations and products for impurity determination, which are used in the test,
are all prepared in accordance with the provisions of GB/T 601, GB/T 602, and
GB/T 603, when no other requirements are specified. The solution used in the
test, if not indicated which solvent is used, refers to aqueous solution.
A.2 Identification test
A.2.1 Infrared spectrum test
Use potassium bromide smear method, to measure the infrared absorption
spectrum in accordance with GB/T 6040; the measured infrared spectrum shall
be consistent with the standard substance spectrum of choline bitartrate (see
Appendix B).
A.2.2 Precipitation reaction
A.2.2.1 Reagents and materials
Iodine solution: Weigh 14 g of iodine; dissolve it in 100 mL of water that contains
36 g of potassium iodide; add 3 drops of hydrochloric acid; add water to dilute
to 1 000 mL; mix well.
A.2.2.2 Analysis steps
Weigh 0.5 g of the sample; dissolve it in 2 mL of iodine solution, and it
immediately produces a reddish-brown precipitate. After adding 5 mL of 40 g/L
sodium hydroxide solution, the precipitate dissolves and the solution becomes
clear yellow. Heat the solution, and it produces a light-yellow precipitate.
A.2.3 Color reaction
A.2.3.1 Reagents and materials
A.2.3.1.1 Potassium ferrocyanide solution: Weigh 2 g of potassium
ferrocyanide [K4Fe(CN)6??3H2O]; dissolve it in 100 mL of water. This solution is
prepared for immediate use.
V1 ?€? the volume of perchloric acid standard solution that is consumed by the
titration of the sample solution, in milliliters (mL);
V2 ?€? the volume of perchloric acid standard solution that is consumed by the
titration of the blank solution, in milliliters (mL);
M ?€? the molar mass of choline bitartrate, in grams per mole (g/mol),
[M(C9H19NO7) = 253.25];
1 000 ?€? volume conversion factor;
m ?€? sample mass, in grams (g).
w ?€? the moisture content of the sample, in grams per hundred grams (g/100 g).
The test result is based on the arithmetic mean of the parallel determination
results. The absolute difference between two independent determination results
that are obtained under repeatability conditions is not more than 0.5%.
A.4 Determination of ignition residue
A.4.1 Reagents and materials
Sulfuric acid
A.4.2 Instruments and apparatuses
A.4.2.1 Balance: sensitivity of 0.1 mg.
A.4.2.2 Crucible.
A.4.2.3 High temperature furnace.
A.4.2.4 Desiccator.
A.4.3 Analysis steps
Take about 2 g of the sample (accurate to 0.000 1 g); put it into a crucible that
has been ignited to a constant weight; slowly ignite on an electric furnace until
it is completely carbonized; cool to room temperature. Add 0.5 mL of sulfuric
acid to wet it; heat at low temperature until sulfuric acid vapor completely
escapes. Then, move it into a high-temperature furnace and burn it at 800 ??C ??
25 ??C until it is completely ashed. Take out the crucible; move it to a desiccator;
let it cool to room temperature; weigh it accurately; then, burn it in a high-
temperature furnace until it has a constant weight. Constant weight means that
the difference between the two weighings does not exceed 0.5 mg. The
carbonization operation is carried out in a fume hood.