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GB 25577-2010

Chinese Standard: 'GB 25577-2010'
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BASIC DATA
Standard ID GB 25577-2010 (GB25577-2010)
Description (Translated English) National food safety standards of food additives titanium dioxide
Sector / Industry National Standard
Classification of Chinese Standard X42
Classification of International Standard 67.220.20
Word Count Estimation 8,824
Date of Issue 2010-12-21
Date of Implementation 2011-02-21
Regulation (derived from) Ministry of Health Bulletin No. 19 of 2010
Issuing agency(ies) Ministry of Health of People's Republic of China
Summary This Chinese standard applies to ilmenite with sulfuric acid as raw materials such as food additives or rutile titanium dioxide ore (or enriched ilmenite) chloride method were food additives titanium dioxide.

GB 25577-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National food safety standard –
Food additives – Titanium dioxide
食品安全国家标准
食品添加剂 二氧化钛
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 
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.
Table 1 -- Sensory requirements
Item Requirements Inspection methods
Colour, Flavour White without peculiar smell PLACE appropriate amount of sample into the
50mL beaker; OBSERVE the colour and tissue
state under the natural light; SMELL the flavour. Tissue state Powder
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.2 General provisions
The reagents and water used in this standard, unless otherwise specified, refer to the
analytical pure reagents and the grade-3 water as specified in GB/T 6682-2008. The
standard volumetric solutions, impurity standard solutions, preparations and products used
in the tests shall be prepared in accordance with the provisions of HG/T 3696.1, HG/T
3696.2 and HG/T 3696.3, unless otherwise specified.
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

GB 25577-2010
National food safety standards of food additives titanium dioxide
National Food Safety Standard
Food additives titanium dioxide
Issued on. 2010-12-21
2011-02-21 implementation
National Standards of People's Republic of China
People's Republic of China Ministry of Health issued
Foreword
Appendix A of this standard is a normative appendix.
National Food Safety Standard
Food additives titanium dioxide
1 Scope
This standard applies with equal ilmenite and sulfuric acid as a raw material for preparing food additives or rutile titanium dioxide ore (or enriched ilmenite) with
Chloride process titanium dioxide obtained food additive.
2 Normative references
The standard file referenced in the application of this standard is essential. For dated references, only the dated edition of fitness
For this standard. For undated references, the latest edition (including any amendments) applies to this standard.
3 formula and relative molecular mass
Formula 3.1
TiO2
3.2 relative molecular mass
79.87 (according to 2007 international relative atomic mass)
4. Technical Requirements
4.1 Sensory requirements. comply with Table 1.
Table 1 Sensory requirements
Project requires test methods
Color, odor and white, no smell proper amount of sample is placed in 50mL beaker was observed under natural light and color groups
Woven state, smell it. Organization Status powder
4.2 Physical indicators. to comply with Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Titanium dioxide (TiO2), w /% ≥ 98.5 Appendix A A.4
Loss on drying, w /% ≤ 0.50 Appendix A A.5
Loss on ignition (dry basis), w /% ≤ 0.50 A.6 in Appendix A
Hydrochloric acid lysates, w /% ≤ 0.50 Appendix A A.7
Water-soluble material, w /% ≤ 0.25 Appendix A A.8
Heavy metals (Pb)/(mg/kg) ≤ 10 Appendix A A.9
Arsenic (As)/(mg/kg) ≤ 5 Appendix A A.10
Appendix A
(Normative)
Testing method
A.1 Warning
Reagents The standard test methods used for toxic or corrosive, the operation should be careful as the water splashed on the skin should immediately
Flushing, severe cases should be treated immediately.
A.2 General Provisions
The standard test methods used in the reagents and water in the absence of other specified requirements, refer to analytically pure reagents and GB/T 6682-2008 in
Three water regulations. Test with the standard titration solution, impurity standard solution, preparations and products, did not indicate when the other requirements, according
HG/T 3696.1, HG/T 3696.2, the provisions of HG/T 3696.3 of preparation.
A.3 Identification Test
Take a sample of about 0.5g add 5mL sulfuric acid, slowly heated until the sulfuric acid mist, cooling. Carefully and slowly diluted with water to 100mL,
filter. Then take about 5mL filtrate was added a few drops of hydrogen peroxide test solution filtrate appears orange-red.
A.4 Determination of titanium dioxide - aluminum reduction
Weigh 0.20g ± 0.01g sample by drying after A.5, accurate to 0.000 1g, other operations with GB/T 7.1 Tiao of 1706-2006.
A.5 Determination of loss on drying
With GB/T 1706-2006 of 7.2, dried 3h.
A.6 Determination of loss on ignition
A.6.1 Instruments and Equipment
High temperature furnace. capable of controlling 800 ℃ ± 25 ℃.
A.6.2 Analysis step
Weigh about 2g according to the sample after drying A.5, accurate to 0.000 1g, placed by firing at 800 ℃ ± 25 ℃ to constant quality porcelain crucible,
In a high temperature furnace firing at 800 ℃ ± 25 ℃ to constant mass.
A.6.3 Calculation Results
LOI mass fraction w1 and its value is expressed in%, according to formula (A.1) Calculated.
0211 × - = m
mmw (A.1)
Where.
m1-- said value after taking A.5 dried sample mass, expressed in grams (g);
Value after m2-- burning sample mass, expressed in grams (g);
m-- sample mass value in grams (g).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.02%.
Determination A.7 hydrochloric acid solutes
A.7.1 Reagents and materials
Hydrochloric acid solution. 119.
A.7.2 Analysis step
Weigh about 5g samples, accurate to 0.01g, placed in 250mL beaker, add 100mL of hydrochloric acid solution and mix. Water bath 30min, on
Filtered and residue was washed with a hydrochloric acid solution 3 times with 10mL. The filtrate and washings were placed in 800 ℃ ± 25 ℃ to constant mass burning crucible
The evaporated to dryness. And then calcined at 800 ℃ ± 25 ℃ in to a constant quality.
A.7.3 Calculation Results
Hydrochloric acid solute mass fraction w2 and its value is expressed in%, according to formula (A.2) Calculated.
012 × = m
mw (A.2)
Wherein
m1-- residue mass value in grams (g);
m-- sample mass value in grams (g).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.01%.
A.8 Determination of water-soluble substance
With GB/T 1706-2006 7.3.
A.9 Determination of Heavy Metals
A.9.1 Reagents and materials
A.9.1.1 hydrochloric acid solution. 119.
A.9.1.2 other with GB/T 5009.74-2003 of Chapter 3.
A.9.2 Instruments and Equipment
With GB/T 5009.74-2003 of Chapter 4.
A.9.3 Analysis step
10.0g ± 0.1g sample was weighed, placed in 250mL b......
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