GB 1903.35-2018
National Food Safety Standard Food Nutritional Enhancer Zinc Acetate (English Version)
- Standard No.
- GB 1903.35-2018
- Language
- Chinese, Available in English version
- Release Date
- 2018
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB 1903.35-2018
- Scope
- This standard applies to zinc acetate, a food nutrition fortifier refined from zinc oxide (or zinc hydroxide) through reaction with acetic acid. 2 Chemical name. Molecular formula, structural formula and relative molecular mass
- Introduction
In-depth interpretation of GB 1903.35-2018 "National Food Safety Standard Food Nutrition Fortifier Zinc Acetate"
Background and significance of standard formulation
As an important food nutrition fortifier, zinc acetate is widely used in foods such as flour and cereals to supplement the zinc element required by the human body. With people's increasing attention to food safety and nutritional health, the state's supervision of food additives has become more stringent. The formulation of GB 1903.35-2018 aims to standardize the quality requirements of zinc acetate, ensure its safe use in food, and protect the health of consumers.
Physical and Chemical Indicators and Quality Control
Items Requirements Testing Methods Zinc Acetate Content (as CH₃COOZn·2H₂O) 99.0-101.0% A.3 in Appendix A pH Value (10% Aqueous Solution) 5.8-7.0 A.4 in Appendix A Arsenic (As)/(mg/kg) ≤2.0 GB 5009.76 Lead (Pb)/(mg/kg) ≤4.0 GB 5009.75 Table 1 shows the main physical and chemical indicators of zinc acetate and its detection methods. Among them, zinc acetate content is the key quality control point, which is required to reach 99.0-101.0% to ensure the purity and stability of the product.
Detection Methods and Technical Points
Determination of Zinc Acetate Content
Titration was performed using chrome black T as an indicator and disodium ethylenediaminetetraacetic acid standard titration solution. This method determines the endpoint by color change to ensure the accuracy of the measurement results. For example, the analysis steps mentioned in Appendix A.3 are: accurately weigh about 0.4 g of zinc acetate sample, add 100 mL of water to dissolve, then add 5 mL of nitrogen-hydrogen chloride buffer and 0.1 mL of chrome black T indicator, and titrate with 0.05 mol/L disodium ethylenediaminetetraacetic acid standard titration solution until dark blue. The absolute difference between parallel determination results should not exceed 0.2%.
Implementation Recommendations
To ensure that the quality of zinc acetate meets the GB 1903.35-2018 standard, food production enterprises should take the following measures:
- Establish a sound quality management system and conduct regular sampling and testing of raw materials and finished products.
- Select zinc acetate products that meet the standards and sign quality agreements with qualified suppliers.
- Carry out internal testing strictly according to the test methods in the standard to ensure that key indicators such as zinc acetate content and pH value meet the requirements.
- Strengthen employee training to enhance awareness of the safety and use of nutritional enhancers.
GB 1903.35-2018 Referenced Document
- GB 5009.15 National Food Safety Standard Determination of Cadmium in Foods*， 2023-09-06 Update
- GB 5009.75 Determination of Lead in Food Additives in National Food Safety Standards
- GB 5009.76 National Food Safety Standards Determination of Arsenic in Food Additives
GB 1903.35-2018 history
- 2018 GB 1903.35-2018 National Food Safety Standard Food Nutritional Enhancer Zinc Acetate