GB 1886.312-2020National food safety standard - Food additive - Chitin (English PDF)
食品安全国家标准 食品添加剂 甲壳素
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Issued by
National Health Commission and State Administration for Market Regulation
Level / Type
National · Mandatory
Issue date
September 11, 2020
Implementation date
March 11, 2021
Scope
GB 1886.312-2020 is the English-translated version of 食品安全国家标准 食品添加剂 甲壳素.
GB 1886.312-2020 is the Chinese national food safety standard for the food additive chitin obtained from shrimp shells, crab shells, horseshoe crab shells, squid bones and mullet bones by decalcification and deproteinization.
It gives the molecular formula (C8H13NO5)n with a degree of polymerization of 1 000 to 3 000, the structural formula, and the sensory and physico-chemical requirements the additive has to meet.
Annex A carries the inspection methods, starting with the general rules on reagent purity and on grade 3 water to GB/T 6682, and with the reagents and materials for the identification test: acetic acid and sulfuric acid solutions, anthrone sulfuric acid solution, the citric acid-trisodium citrate buffer at pH 5.0 and the ninhydrin solution. It was issued on 11 September 2020 and has applied since 11 March 2021.
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Document preview — GB 1886.312-2020
National Standard of the People's Republic of China
Issued by: National Health Commission and State Administration for Market Regulation
Contents
- 1 Scope3
- 2 Molecular formula and structural formula3
- 3 Technical requirements3
- Annex A Inspection methods5
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
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.
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