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GB 29948-2013: Food additive -- Sodium polyacrylate
Status: Valid
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Food additive -- Sodium polyacrylate
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Basic data
Standard ID: GB 29948-2013 (GB29948-2013)
Description (Translated English): Food additive -- Sodium polyacrylate
Sector / Industry: National Standard
Classification of Chinese Standard: C54
Classification of International Standard: 67.020
Word Count Estimation: 9,990
Regulation (derived from): China Food & Drug Administration [2013] No. 234, November, 1, 2013
Issuing agency(ies): National Health and Family Planning Commission of the People's Republic of China
Summary: This standard applies to food additives: sodium polyacrylate.
GB 29948-2013: Food additive -- Sodium polyacrylate
---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.
Food additive-Sodium polyacrylate
National Standards of People's Republic of China
Issued on. 2013-11-29
2014-06-01 implementation
National Food Safety Standard
Food additive sodium polyacrylate
National Food Safety Standard
Food additive sodium polyacrylate
1 Scope
This standard applies to food additive sodium polyacrylate with sodium acrylate as raw material, ammonium sulfate as catalyst polymerization system.
2 Molecular and structural formula
Formula 2.1
(C3H3NaO2) n
2.2 formula
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall comply with the requirements of Table 1.
Table 1 Sensory requirements
Project requires test methods
Color White take appropriate sample is placed in white porcelain dish, observed under natural light
Status and color powder or granules
3.2 Physical and Chemical Indicators
Physical and chemical indicators should be consistent with the provisions of Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
The free base in Appendix A test A.3
Sulfate (SO4 dollars), w /% ≤ 0.48 Appendix A A.4
Residual monomers, w /% ≤ 1.0 A.5 in Appendix A
Oligomers, w /% ≤ 5.0 A.6 in Appendix A
Loss on drying, w /% ≤ 10.0 GB 5009.3 a direct drying
Residue on ignition (dry basis), w /% ≤ 76.0 Appendix A A.7
Heavy metals (Pb)/(mg/kg) ≤ 20 GB/T 5009.74
Total arsenic (As)/(mg/kg) ≤ 3 GB/T 5009.11
a drying temperature and time were 105 ℃ ± 2 ℃ and 4h.
Appendix A
Testing method
A.1 General Provisions
Unless otherwise specified in this standard, the use of analytical reagent purity should be more than the standard titration solution, standard solution for measuring impurities,
Preparations and products, should be GB/T 601, GB/T 602, the provisions of the preparation of GB/T 603, the test water should be consistent with GB/T 6682-2008 in three water
Provisions. Solution was used in the tests did not indicate what is formulated with solvent, it refers to an aqueous solution.
A.2 Identification Test
A.2.1 in 10 mL sample solution (1 g sample was dissolved in 500 mL of water) was added 1 mL at a concentration of 0.5 mol/L of magnesium sulfate solution, shake, production
Raw white precipitate.
A.2.2 take platinum wire, with hydrochloric acid solution (10%) after wet, dipped into the sample combustion in a colorless flame, the flame that was yellow.
A.3 Determination of the free base
A.3.1 Reagents and materials
A.3.1.1 calcium chloride solution. 75 g/L.
A.3.1.2 phenolphthalein indicator solution. 10 g/L.
A.3.2 Analysis step
Weigh the sample 0.20 g, was added 60 mL of water, and shake to dissolve. After adding 3 mL of calcium chloride solution was heated on a hot water bath for about 20 min, cooled
filter. , Diluted with water residue washings and filtrate were combined, add water to 100 mL, this sample solution referred to as solution A. 50 mL of solution A, plus
2 drops of phenolphthalein indicator solution, no solution appears pink, is through the test.
A.4 Determination of sulfates
A.4.1 Reagents and materials
A.4.1.1 hydrochloric acid solution. 13.
A.4.1.2 sulfuric acid solution. 0.005 mol/L.
A.4.1.3 barium chloride solution. Weigh barium chloride 12.0 g, dissolved in water and diluted to volume to 100 mL, and mix.
A.4.2 Analysis step
Pipette 20 mL A.3.2 solution A, placed in 50 mL colorimetric tube, add 1 mL solution of hydrochloric acid, diluted with water to 50 mL, This is the test
Solution. Another one colorimetric tube, add 0.40 mL sulfuric acid solution, then add 1 mL solution of hydrochloric acid, diluted with water to 50mL, this is the control solution.
If the solution is not enough clarified, the solution was filtered then two under the same conditions. Barium chloride were added to a solution of 2 mL, placed 10 min after mixing. In Black
From the above comparison of colorimetric tubes both turbidity, the turbidity of the sample solution should not exceed the background color control solution turbidity, namely sample sulfate content (as SO4
Meter) does not exceed 0.48%.
A.5 Determination of residual monomers
A.5.1 Reagents and materials
A.5.1.1 hydrochloric acid.
A.5.1.2 potassium bromate - potassium bromide solution. dissolve after taking 1.4 g of potassium bromate and 8.1 g of potassium bromide, mixed with water and diluted to 100 mL.
A.5.1.3 potassium iodide solution. Weigh 16.5 g of potassium iodide, dissolved in water and diluted to 100 mL, need dark storage.
A.5.1.4 sodium thiosulfate standard titration solution. c (Na2S2O3) = 0.1 mol/L.
A.5.1.5 starch indicator solution. 10 g/L.
A.5.2 Analysis step
Weigh approximately 1 g samples, accurate to 0.000 1 g, placed in a 300 mL iodine flask, add water, 100 mL, to stand for about 24 h, from time to time during the
Shaking to dissolve. Add 10 mL of potassium bromate - potassium bromide solution, shake it well, quickly adding about 10 mL of hydrochloric acid and immediately cork tightly and fully
Shake well. Iodine was added to the flask 20 mL potassium iodide solution was allowed to stand in the dark for 20 min. Songse, mixed with a solution of potassium iodide mixture, immediately
Plugged stopper. After thorough shaking, a few drops of starch indicator solution, titration with sodium thiosulfate standard solution titration. While doing the blank test.
A.5.3 Calculation Results
The mass fraction of residual monomers w1 according to formula (A.1) Calculated.
02100001
m
McVVw (A.1)
Where.
Volume V0-- blank titration consumption of sodium thiosulfate standard titration solution, in milliliters (mL);
Volume of the sample solution V-- titration consumption of sodium thiosulfate standard titration solution, in milliliters (mL);
C-- actual concentration of sodium thiosulfate standard titration solution, expressed in moles per liter (mol/L);
Molar mass M-- residual monomer in grams per mole (g/mol) [M (C3H3NaO2) = 94];
m-- sample mass, in grams (g);
1000-- volume conversion factor;
2-- conversion factor.
Determination A.6 oligomer
A.6.1 Reagents and materials
A.6.1.1 hydrochloric acid.
A.6.1.2 sodium hydroxide solution. 400 g/L.
A.6.1.3 hydrochloric acid solution. 1 → 30.
A.6.1.4 calcium chloride solution. 75 g/L.
A.6.1.5 phenolphthalein indicator solution. 10 g/L.
A.6.2 Instruments and Equipment
A.6.2.1 glass crucible. G4, pore size 4 μm ~ 7 μm; before use at 105 ℃ ± 2 ℃ drying 30 min, after cooling in a dryer and weighed.
A.6.2.2 dryer.
A.6.3 Analysis step
It weighs about 2 g samples, accurate to 0.001 g, add water, 200 mL, shaking from time to time to dissolve the sample. While stirring, 50 mL of hydrochloric acid was added, in
Under stirring, at 40 ℃ water bath warmed 30 min, then allowed to stand for 24 h. Filter, was added 1 drop of phenolphthalein indicator solution in the filtrate, was added sodium hydroxide solution
Liquid filtrate to pale pink, pink solution of hydrochloric acid solution to disappear. Water was added to 200 mL, added dropwise with stirring 25 mL calcium chloride solution, stirring
Lower at about 40 ℃ warm water bath 30 min. (A.6.2.1) glass crucible with suction, and then about 3 parts per 10 mL of water washed residue at 105
℃ ± dried at 2 ℃ 3 h, cooled in a desiccator and weighed.
A.6.4 Calculation Results
Mass fraction w2 oligomer according to formula (A.2) Calculated.
0032.1122 m
mmw - (A.2)
Where.
After drying quality m2-- crucible and residue, in grams (g);
m1-- crucible mass in grams (g);
1.032-- conversion factor;
m-- sample mass, in grams (g).
A.7 Determination of residue on ignition (dry basis) of
A.7.1 Reagents and materials
sulfuric acid.
A.7.2 Instruments and Equipment
Crucible. Burning 3 h at 450 ℃ ~ 550 ℃, after cooling in a desiccator and weighed.
A.7.3 Analysis step
Weigh 1 g ~ 2 g ± advance at 105 ℃ 2 ℃ dried the samples 4 h, and accurate to 0.000 1 g, placed in a crucible, adding a small amount of sulfuric acid,
Heated slowly until the sample is completely volatilized or charring. Heating was continued to sulfuric acid vapor Yat do, burning 3 h at 450 ℃ ~ 550 ℃. The crucible and residues
Slag in a dryer after the cooling load.
A.7.4 Calculation Results
Burning residue mass fraction w3 according to formula (A.3) Calculated.
0123 m
mmw - (A.3)
Where.
After m2-- crucible and residue on ignition mass in grams (g);
m1-- crucible mass in grams (g);
m-- sample mass, in grams (g).
......
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