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GB 25577-2010: National food safety standards of food additives titanium dioxide
---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/GB25577-2010GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA National food safety standard – Food additives – Titanium dioxide Issued on. DECEMBER 21, 2010 Implemented on. FEBRUARY 21, 2011 Issued by. Ministry of Health of the People's Republic of China
Table of Contents
Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Molecular formula and relative molecular mass... 4 4 Technical requirements... 4 Appendix A (Normative) Testing method... 6Foreword
Appendix A of this Standard is normative. National food safety standard – Food additives – Titanium dioxide1 Scope
This Standard is applicable for the food additive titanium dioxide which is prepared from the raw materials such as titanic iron ore and sulfuric acid OR is prepared with rutile ore (or enriched titanic iron ore) by using chlorination.2 Normative references
The referenced documents in this Standard are essential to the application of this Standard. For the dated documents, only the versions with the dates indicated are applicable to this Standard; for the undated documents, only the latest version (including all the amendments) are applicable to this Standard.3 Molecular formula and relative molecular mass
3.1 Molecular formula TiO2 3.2 Relative molecular mass 79.87 (According to the international relative atomic weight in 2007)4 Technical requirements
4.1 Sensory requirements Sensory requirements shall comply with the requirements of Table 1.Appendix A
(Normative) Testing method A.1 Warnings Some reagents used in this Standard’s test method are toxic or corrosive. It must be careful when performing the operation! If it is splashed onto the skin, the skin shall be washed with water immediately. Severe cases shall be treated immediately. A.3 Identification test Take approximate 0.5g of the sample. Add 5mL of the sulfuric acid. Perform heating slowly until the sulfuric acid appears smog; cool it down. Carefully dilute it to 100mL with water AND; filter it. Then take approximate 5mL of the filter liquor. Add a few drops of the test solution -- hydrogen peroxide. The filter liquor appears orange red. A.4 Determination of titanium dioxide - Aluminum reduction method Weigh 0.20g±0.01g of the sample which has been dried, according to A.5.The accuracy is 0.0001g. Other operations are the same as the 7.1 of GB/T 1706-2006. A.5 Determination of the loss on drying Same as the 7.2 of GB/T 1706-2006.Dry for 3 hours. A.6 Determination of the loss on ignition A.6.1 Instruments and equipment High temperature furnace. it can be controlled at 800°C±25°C. A.6.2 Analytical procedures Weigh approximate 2g of the sample which has been dried, according to A.5.The accuracy is 0.0001g. Place it into the porcelain crucible which can be ignited to the constant mass. Ignite it to the constant mass at 800°C±25°C in the high temperature furnace. A.7 Determination of hydrochloric acid lysate A.7.1 Reagents and materials Hydrochloric acid solution. 1+19. A.7.2 Analytical procedures Weigh approximate 5g of the sample. The accuracy is 0.01g. Place it into the 250mL beaker. Add 100mL of the hydrochloric acid solution. Mix it evenly. Perform heating on the water bath for 30min. Filter it. Wash the filter residue for 3 times with the hydrochloric acid solution; use 10mL for each time. Place the filter liquor and the washing solution into the crucible which can perform ignition until the constant mass under 800°C±25°C. Evaporate it till dryness. And then, ignite it till the constant mass under 800°C±25°C. Same as the 7.3 of GB/T 1706-2006. A.9 Determination of heavy metals A.9.1 Reagents and materials A.9.1.1 Hydrochloric acid solution. 1+19. A.9.1.2 Others are the same as the Chapter 3 of GB/T 5009.74-2003. A.9.2 Instruments and equipment Same as the Chapter 4 of GB/T 5009.74-2003. A.10 Determination of arsenic Remove 4.00mL of the sample solution A (A.9.3) and 2mL of the arsenic standard solution (1mL of the solution contains 0.001mg of As) for the determination. Other operations shall be the same as GB/T 5009.76-2003. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
