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| GB 25577-2010 | English | 70 |
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National food safety standards of food additives titanium dioxide
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GB 25577-2010: National food safety standards of food additives titanium dioxide
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GB
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... 6
Foreword
Appendix A of this Standard is normative.
National food safety standard –
Food additives – Titanium dioxide
1 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.
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