GB 1886.312-2020 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 1886.312-2020 | English | 70 |
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National food safety standard - Food additive - Chitin
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GB 1886.312-2020: National food safety standard - Food additive - Chitin---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB1886.312-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National food safety standard - Food additive - Chitin
ISSUED ON: SEPTEMBER 11, 2020
IMPLEMENTED ON: MARCH 11, 2021
Issued by: National Health Commission of the People's Republic of China;
State Administration for Market Regulation.
Table of Contents
1 Scope ... 3
2 Molecular formula and structural formula ... 3
3 Technical requirements ... 3
Annex A Inspection methods ... 5
National food safety standard - Food additive - Chitin
1 Scope
This Standard is applicable to the food additive chitin that uses shrimp shells,
crab shells, horseshoe crab shells, squid bones, mullet bones as main raw
materials and is processed through decalcification and deproteinization.
2 Molecular formula and structural formula
2.1 Molecular formula
(C8H13NO5)n
n: degree of polymerization, 1000~3000
2.2 Structural formula
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall meet the requirements of Table 1.
Annex A
Inspection methods
A.1 General
Unless otherwise specified in this Standard, the purity of the reagents used
shall be above the analytical purity. The standard titration solution used,
standard solution for impurity determination, preparations and products shall be
prepared in accordance with the provisions of GB/T 601, GB/T 602, and GB/T
603. The test water shall meet the requirements of grade 3 water in GB/T 6682.
The solution used in the test refers to an aqueous solution when it is not
specified which solvent is used for preparation.
A.2 Identification test
A.2.1 Reagents and materials
A.2.1.1 1% acetic acid solution: Measure 1.0mL of acetic acid. Use water to set
volume to 100mL.
A.2.1.2 Sulfuric acid.
A.2.1.3 Hydrochloric acid.
A.2.1.4 0.2% anthrone sulfuric acid solution: Weigh 0.2g of anthrone, to the
nearest of 0.01g. Dissolve in 100mL of sulfuric acid. Prepare when it is required.
A.2.1.5 Sodium hydroxide solution: 1mol/L.
A.2.1.6 Citric acid solution: 0.1mol/L.
A.2.1.7 Trisodium citrate solution: 0.1mol/L.
A.2.1.8 Citric acid-trisodium citrate buffer (pH 5.0): Respectively measure
16.4mL of citric acid solution (0.1mol/L) and 23.6mL of trisodium citrate solution
(0.1mol/L). Mix well. If the pH of the solution deviates, it needs to be adjusted
to pH 5.0.
A.2.1.9 Ethylene glycol monomethyl ether.
A.2.1.10 Ninhydrin solution: Weigh 1.0g of ninhydrin, to the nearest of 0.01g.
Add 25mL of ethylene glycol monomethyl ether and 25mL of citric acid-
trisodium citrate buffer. Mix well.
A.2.2 Identification method
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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