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GB 1886.362-2022 (GB1886.362-2022)

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GB 1886.362-2022: PDF in English

GB 1886.362-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National food safety standard - Food additive - ε-Polylysine
食品添加剂 ε-聚赖氨酸
ISSUED ON. JUNE 30, 2022
IMPLEMENTED ON. DECEMBER 30, 2022
Issued by. National Health Commission of PRC;
State Administration for Market Regulation.
Table of Contents
1 Scope... 3
2 Chemical name, molecular formula, structural formula, and the relative molecular
mass... 3
3 Technical requirements... 3
Appendix A Testing method... 5
Appendix B Reference liquid chromatogram of ε-Polylysine... 9
National food safety standard - Food additive - ε-Polylysine
1 Scope
This standard applies to the food additive ε-Polylysine obtained by using the yeast
extract or other nitrogen-containing substances as the main raw material, through
aerobic fermentation of Streptomyces albulus, separation and purification.
2 Chemical name, molecular formula, structural formula, and
the relative molecular mass
2.1 Chemical name
ε-Polylysine
2.2 Molecular formula
H[C6H12N2O]nHO
2.3 Structural formula
2.4 Relative molecular mass
128.176n + 18.016 (according to 2018 International Relative Atomic Mass)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall meet the requirements of Table 1.
Appendix A
Testing method
A.1 Warning
Some of the reagents used in the test methods of this standard are toxic or corrosive and
shall be handled with care and in accordance with relevant national regulations. If
splashed on the skin, rinse immediately with water, if serious, seek medical attention
immediately. When volatile acids are used, the operation shall be carried out in a fume
cupboard.
A.2 General provisions
Unless other requirements are specified, the reagents and water used in this standard
refer to analytical reagents and grade III water specified in GB/T 6682.The solution
used in the test refers to the aqueous solution if the solvent is not specified.
A.3 Identification test
A.3.1 Reagents and materials
A.3.1.1 Basic bismuth nitrate solution. Weigh 0.85 g basic bismuth nitrate, and add 10
mL acetic acid and 40 mL water to dissolve it.
A.3.1.2 Potassium iodide solution. Dissolve 8 g potassium iodide in 20 mL water
A.3.1.3 Bismuth potassium iodide solution. Mix 5 mL basic bismuth nitrate solution, 5
mL potassium iodide solution, 20 mL acetic acid, and 100 mL water; prepare it just
before using.
A.3.1.4 Phosphate buffer. pH 6.8.Weigh 3.40 g potassium dihydrogen phosphate and
3.55 g anhydrous disodium hydrogen phosphate, dissolve it in water and dilute to 1000
mL.
A.3.1.5 Methyl orange solution. Weigh 0.1 g methyl orange, dissolve it in 100 mL water,
and filter if necessary.
A.3.2 Instruments and equipment
Electronic balance. The sense quantity shall be 0.001 g.
A.3.3 Identification method
A.3.3.1 Precipitation of bismuth potassium iodide
Weigh about 0.1 g of the sample and dissolve it in 100 mL water; take 1 mL of the
solution, and add 1 mL bismuth potassium iodide solution (A.3.1.3), then, there shall
be brown-red precipitation.
A.3.3.2 Methyl orange precipitation
Weigh about 0.1 g of the sample, dissolve it in 100 mL phosphate buffer (A.3.1.4); take
1 mL of the solution, and add 1 mL methyl orange solution (A.3.1.5), then, there shall
be rufous precipitation.
A.4 Determination of the content of ε-Polylysine
A.4.1 Principles of the method
After the sample is dissolved in phosphate buffer, separate it by the liquid
chromatography, detect it by an ultraviolet detector or a diode array detector, and
quantify it by the external standard method.
A.4.2 Reagents and materials
A.4.2.1 The water shall be grade I water specified in GB/T 6682.
A.4.2.2 Sodium sulfate (Na2SO4).
A.4.2.3 Dipotassium hydrogen phosphate (K2HPO4).
A.4.2.4 Phosphoric acid (H3PO4).
A.4.2.5 Acetonitrile (C2H3N). chromatographically pure.
A.4.2.6 ε-Polylysine standard. purity ≥95.0%.
A.4.2.7 Phosphate buffer. Dissolve 1.7 g dipotassium hydrogen phosphate and 1.42 g
sodium sulfate in 800 mL water, adjust the pH to 2.2 with the phosphoric acid, and
dilute to 1000 mL with water. Filter it through a 0.45 μm membrane.
A.4.2.8 Solution for diluting to volume. Take 92 mL phosphate buffer (A.4.2.7), add 8
mL acetonitrile, and mix well.
A.4.2.9 Aqueous filter membrane. 0.45 μm.
A.4.3 Instruments and equipment
A.4.3.1 Electronic balance. The sense quantity shall be 0.1 mg.
A.4.3.2 Liquid chromatograph. It shall be equipped with a UV detector or diode array
......
(Above excerpt was released on 2022-08-21, modified on 2022-08-21, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GB1886.362-2022