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GB 29215-2012: National food safety standards -- Food additives -- Plant carbon (wood activated carbon)
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National food safety standards -- Food additives -- Plant carbon (wood activated carbon)
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GB 29215-2012
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Basic data
| Standard ID | GB 29215-2012 (GB29215-2012) |
| Description (Translated English) | National food safety standards -- Food additives -- Plant carbon (wood activated carbon) |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | X40 |
| Classification of International Standard | 67.220.20 |
| Word Count Estimation | 11,163 |
| Regulation (derived from) | Ministry of Health Bulletin 2012 No. 23 |
| Issuing agency(ies) | Ministry of Health of the People's Republic of China |
| Summary | This Chinese standard applies to wood, bamboo, coconut shell or husk and other plant material by physical or chemical method were food additives plant carbon (wood activated carbon). |
GB 29215-2012: National food safety standards -- Food additives -- Plant carbon (wood activated carbon)
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National food safety standards.Food additives.Plant carbon (wood activated carbon)
National Standards of People's Republic of China
National standards for food safety
Food Additives Plant Activated Carbon (Wood Activated Carbon)
2012-12-25 release
2013-01-25 Implementation
Issued by the Ministry of Health of the People's Republic of China
National standards for food safety
Food Additives Plant Activated Carbon (Wood Activated Carbon)
1 Scope
This standard is applicable to vegetable additives prepared by physical or chemical methods such as wood chips, bamboo, coconut shells or shells.
Charcoal (wood activated carbon).
2 molecular formula and relative molecular mass
2.1 Molecular formula
C.
2.2 Relative molecular mass
12.01 (according to.2007 International Relative Atomic Quality)
3 technical requirements
3.1 sensory requirements
Shall comply with the provisions of Table 1.
Table 1 sensory requirements
The project requires a test method
Color black
State powder or particles
Take the appropriate amount of sample in a 50mL beaker and look under natural light
Color and state
3.2 Physical and chemical indicators
Shall comply with the provisions of Table 2.
Table 2 Physical and chemical indicators
Item Index Test Method
Iodine Adsorption Value (in dry basis)/(mg/g) ≥ 400 GB/T 12496.8
Sulfate Ash (on dry basis), w /% ≤ 7.0 Appendix A A.4
Cyanide through test GB/T 12496.14
Advanced Aromatic Hydrocarbons Pass Test Appendix A A.5
Water Solids (on a dry basis), w /% ≤ 4.0 Appendix A A.6
Arsenic (As) (dry basis)/(mg/kg) ≤ 3 Appendix A A.7
Lead (Pb) (dry basis)/(mg/kg) ≤ 5 Appendix A A.8
Appendix A
Testing method
A.1 Warning
Some of the reagents used in the test methods of this standard are toxic or corrosive and should be operated with appropriate safety and protective measures.
A.2 General provisions
The reagents and water used in this standard, when not specified in other requirements, refer to the analysis of pure reagents and GB/T 6682-2008 in the provisions of the three
Water level. Standard titration solution used in the test, the standard solution for the determination of impurities, preparations and products, without any other requirements,
GB/T 601, GB/T 602, GB/T 603. The solution used refers to an aqueous solution when it is not specified with any solvent formulation.
A.3 Identification test
A.3.1 Reagents and materials
A.3.1.1 Hydrochloric acid solution. 5%.
A.3.1.2 Iodine solution. Dissolve 14.0 g of iodine and 36.0 g of potassium iodide in 100 mL of water, add 3 drops of hydrochloric acid, dilute to 1000 mL with water,
Shake well.
A.3.2 Identification method
Take about 3.0g sample, placed in 10mL hydrochloric acid solution containing iodine bottle, boil and keep for 30s, cooled to room temperature, add 100mL
Iodine solution, plug the stopper, strong shaking 30s. With medium-speed qualitative filter paper filter, discard the original filtrate 20mL, the filtrate transferred to 50mL colorimetric
Tube to the scale, compared with the reference solution, the color should not be deeper than the reference solution.
Reference solution. with a pipette to remove 10mL of iodine solution placed in 50mL colorimetric tube, diluted with water to the mark, shake.
A.4 Determination of Sulfate Ash
A.4.1 Reagents and materials
A.4.1.1 Ammonium carbonate.
A.4.1.2 Sulfuric acid.
A.4.1.3 Sulfuric acid solution. 1 19.
A.4.2 Instruments and equipment
A.4.2.1 porcelain crucible. 30mL.
A.4.2.2 High temperature furnace. can control the temperature at 800 ℃ ± 25 ℃.
A.4.3 Analysis steps
Approximately 0.5 g of the sample was weighed to 0.0002 g and placed in a porcelain crucible at a constant temperature of 800 ° C ± 25 ° C until a constant mass was added.
Into a sufficient amount of sulfuric acid solution, infiltration of all samples. Placed on the hot plate slowly heated until the sample is dry and fully carbonized, continue to heat straight
To all samples volatilize or almost all of the charcoal is oxidized and cooled to room temperature. Add 0.1mL sulfuric acid wetting residue, according to the above way to continue to add
Heat until the residue and excess sulfuric acid are evaporated, in order to promote the evaporation of sulfuric acid in the addition of sulfuric acid residue to add a few pieces of ammonium carbonate. Continue on
800 ° C ± 25 ° C to a constant mass.
A.4.4 Calculation of results
The mass fraction w1 of sulfate ash is calculated according to formula (A.1)
w1 =
m1-m2
m (100% -w4)
× 100% (A.1)
Where.
m1 --- the mass of the residue after ignition and the crucible, in grams (g);
m2 --- the mass of the crucible, in grams (g);
m - the mass of the sample, in grams (g);
w4 --- mass fraction of dry reduction as measured in Appendix B,%.
The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The value is not greater than 0.5%.
A.5 Advanced Aromatic Hydrocarbon Test
A.5.1 Reagents and materials
A.5.1.1 Cyclohexane.
A.5.1.2 Quinine sulfate standard solution. 1mL solution containing quinine sulfate [(C20H24N2O2) 2 · H2SO4] 0.1μg.
Weigh 1.048g of quinine sulfate [(C20H24N2O2) 2 · H2SO4 · 2H2O], placed in a 1000mL volumetric flask, dissolved in sulfuric acid
Solution (3 1000), diluted with sulfuric acid solution (3 1000) to the scale, shake. The solution is quinine quinine standard solution Ⅰ, 1mL dissolved
Liquid containing quinine sulfate [(C20H24N2O2) 2 · H2SO4] 1mg.
Remove 1 mL of quinine sulphate standard solution I with a pipette, place in a 100 mL volumetric flask, dilute with sulfuric acid solution (3 1000)
Scale, shake. The solution is quasi-sulfuric acid standard solution Ⅱ, 1 mL solution containing quinine sulfate [(C20 H24N2O2) 2
H2SO4] 0.01 mg.
Remove 1 mL of quinine sulphate standard solution II with a pipette, place in a 100 mL volumetric flask, dilute with sulfuric acid solution (3 1000)
Scale, shake. The solution is the standard solution of quinine sulfate, 1mL solution containing quinine sulfate [(C20H24N2O2) 2 · H2SO4]
0.1μg, the solution is now ready for use.
A.5.2 Instruments and equipment
A.5.2.1 Cable extractor device diagram, see Figure A.1.
A.5.2.2 Colorimetric tubes. 10 mL.
1 --- condenser;
2 - cable extractor;
3 --- filter paper bag;
4 --- flask (50mL).
Figure A.1 Cable extractor device diagram
A.5.3 Analysis steps
Weigh the sample that had passed through the 71 μm test sieve and dried in accordance with Appendix B, 1.00 g ± 0.01 g, wrapped in clean filter paper,
In a stripper, 12.0 mL of cyclohexane was added to the flask and the device was connected as shown in Figure A.1. The flask was placed in a 90 ° C to 95 ° C water bath
Continued extraction 2h. The extract was cooled and transferred to a colorimetric tube.
The standard solution was prepared by placing 10 mL of the standard solution of quinine sulfate in a colorimetric tube.
Under the UV lamp (365 nm), the sample solution shows the color or fluorescence does not exceed the standard solution for the pass test.
A.6 Determination of water-soluble substance (on a dry basis)
A.6.1 Instruments and equipment
A.6.1.1 reflux condenser.
A.6.1.2 electric thermostat oven. can control the temperature of 100 ℃ ± 2 ℃.
A.6.2 Analysis steps
Remove the sample that had passed through the 71 μm test sieve and dried in accordance with Appendix B, approximately 0g, accurate to 0.01g. Placed in a condenser with a reflux condenser
Brewed valve in a 250 mL dry flask. Add 100.0 mL of water and several glass spheres, heated to reflux for 1 h. Slightly cool and then use
Quick-cut filter paper for dry filtration, discard the original 10mL filtrate. The resulting filtrate was cooled to room temperature. Remove 25 mL of the filter with a pipette
The solution was placed in a pan at 100 ° C ± 2 ° C until the mass was constant. The pan was placed on a water bath and evaporated to the filtrate
The solution should not boil the solution. Dried at 100 ° C ± 2 ° C until the mass is constant. Retention filtrate A is used for the determination of arsenic.
A.6.3 Calculation of results
The mass fraction of water-soluble matter w2 is calculated according to formula (A.2)
w2 =
m1-m2
m × (25/100) x 100%
(A.2)
Where.
m1 --- the value of the mass of the residue and the evaporated dish after drying, in grams (g);
m2 --- the value of the quality of the evaporating dish, in grams (g);
m - the mass of the sample, in grams (g);
25 --- Remove the volume of the test solution in milliliters (mL);
100 - The volume of water added in milliliters (mL).
The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The value is not greater than 0.3%.
A.7 Determination of arsenic (As)
Remove 20.00 mL of the retained filtrate A (A.6.2) and place it as a test solution. The following by GB/T 5009.76 into the
Line determination.
A.8 Determination of lead (Pb)
A.8.1 Methodological Summary
The lead ions in the sample were extracted with water containing nitric acid. On the atomic absorption spectrophotometer, the air-acetylene flame was used, and the working curve method
To be measured.
A.8.2 Reagents and materials
A.8.2.1 Nitric acid.
A.8.2.2 Nitric acid solution. 1 5.
A.8.2.3 Lead (Pb) standard solution. 0.10 mg/mL.
A.8.2.4 Water. in line with GB/T 6682-2008 in the provisions of secondary water.
A.8.3 Instruments and equipment
Atomic Absorption Spectrophotometer. With lead hollow cathode lamp.
A.8.4 Determination steps
A.8.4.1 Cleaning of the instrument
Glass equipment used in nitric acid solution (A.8.2.2) soak overnight, rinse with tap water, and finally rinse with water.
A.8.4.2 Drawing of working curves
Remove 0 mL, 0.50 mL, 1.00 mL, 1.50 mL lead standard solution with pipettes, placed in four 50 mL volumetric flasks,
1mL nitric acid, diluted with water to the mark, shake. In the atomic absorption spectrophotometer, the use of air - acetylene flame, the wavelength of 283.3nm
Place, water zero, select the best instrument working conditions, measuring the absorbance of the solution.
The absorbance of the blank solution is subtracted from the absorbance of the standard solution. The concentration of the lead is the abscissa, and the corresponding absorbance is the ordinate.
System work curve.
A.8.4.3 Determination
Weigh about 5g sample, accurate to 0.0002g, placed in a conical flask, add 50mL of water, add 1mL nitric acid, placed in the electric furnace heating
Micro-boiling 10min, slightly cold, with the speed of qualitative filter paper filter, with a small amount of water washed 3 times ~ 5 times, lotion and filtrate combined placed in 50mL capacity
Bottle, cool to room temperature, diluted with water to the mark, shake.
In the atomic absorption spectrophotometer, the use of air - acetylene flame, at the wavelength of 283.3nm, with water zero, select the best instrument work
Conditions, measuring the absorbance of the test solution. The concentration of lead in the test solution (mg/L) was determined from the working curve based on the measured absorbance.
A.8.5 Calculation of results
Lead (Pb) mass fraction w3, expressed in milligrams per kilogram (mg/kg), calculated according to formula (A.3).
w3 = ρ
× 0.05 × 1000
m (100% -w4)
(A.3)
Where.
ρ --- the value of lead concentration found by the working curve in milligrams per liter (mg/L);
m - the mass of the sample, in grams (g);
w4 - mass fraction of dry reduction as measured in Appendix B,%;
0.05 --- volume of the volumetric flask, in liters (L);
1000 --- conversion factor.
The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The value is not greater than 2mg/kg.
Appendix B
Determination of drying reduction
B.1 Instruments and equipment
Weighing bottle. φ50mm × 30mm.
B.2 Analysis steps
Use a weighing bottle that has been dried at 120 ° C ± 2 ° C until the mass is constant. Weigh 1 g to 2 g of sample, accurate to 0.0002 g at 120 ° C ±
Dried at 2 ° C for 4 h. After being allowed to stand in the desiccator and weighed.
B.3 Result calculation
The mass fraction w4 of the drying reduction is calculated according to the formula (B.1)
w4 =
m1-m2
m x 100%
(B.1)
Where.
m1 --- the value of the sample before the drying and the quality of the weighing bottle, in grams (g);
m2 --- the value of the sample after drying and the weight of the weighing bottle, in grams (g);
m - the mass of the sample, in grams (g).
The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The ratio of the value to the arithmetic mean is not more than 2%.
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