GB 1886.44-2016 English PDF (GB1886.44-2016)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get Quotation: Click GB 1886.44-2016 (Self-service in 1-minute)
Historical versions (Master-website): GB 1886.44-2016
Preview True-PDF (Reload/Scroll-down if blank)

GB 1886.44-2016: Food additive -- Sodium ascorbate
GB 1886.44-2016
(Food safety national standard - Food additive - Sodium ascorbate)
National Standards of People's Republic of China
National Food Safety Standard
Food additive sodium ascorbate
Issued on. 2016-08-31
2017-01-01 implementation
People's Republic of China
National Health and Family Planning Commission released
Foreword
This standard replaces GB 16313-1996 "Food additive sodium ascorbate."
This standard compared with GB 16313-1996, the main changes are as follows.
--- Standard name was changed to "national food safety standards for food additives sodium ascorbate."
National Food Safety Standard
Food additive sodium ascorbate
1 Scope
This standard applies to ascorbic acid and sodium for raw materials of food additive sodium ascorbate.
2 molecular formula, relative molecular mass and structural formula
Formula 2.1
C6H7NaO6
2.2 formula
2.3 relative molecular mass
198.11 (according to 2007 international relative atomic mass)
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
White to light yellow color
Crystalline solid state
Take the right amount of sample is placed in a clean, dry white porcelain dish, self
Under natural light, observe its color and status
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
Sodium ascorbate (C6H7NaO6) content (dry basis), w /% 99.0 ~ 101.0 Appendix A A.3
Loss on drying, w /% ≤ 0.25 Appendix A A.4
Specific rotation (dry basis) αm (20 ℃, D)/[(°) · m2 · kg-1] 103 ~ 108 Appendix A A.5
pH (10% aqueous solution) 7.0 ~ 8.0 GB/T 9724
Heavy metals (Pb)/(mg/kg) ≤ 20 GB 5009.74
Arsenic (As)/(mg/kg) ≤ 3.0 GB 5009.76
Lead (Pb)/(mg/kg) ≤ 10.0 GB 5009.75
Appendix A
Testing method
A.1 General Provisions
This standard reagents and water in the absence of other specified requirements, refer to the three water analytical reagent and GB/T 6682 regulations. test
In the standard titration solution, impurity measurement standard solution, preparations and products, did not indicate when the other requirements, according to GB/T 601,
GB/T 602 and GB/T 603 provisions prepared. 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 solubility
1g sample can be dissolved in 2mL water.
A.2.2 Identification
A.2.2.1 Method summary
Ascorbic acid in the sample portion having a diene alcohol group structure, with a strong reduction, and the nature of sugars.
A.2.2.2 Reagents and materials
A.2.2.2.1 activated carbon.
A.2.2.2.2 pyrrole.
A.2.2.2.3 hydrochloric acid.
A.2.2.2.4 alkaline copper tartrate solution.
A.2.2.2.5 hydrochloric acid solution. 9 → 1000.
A.2.2.2.6 trichloroacetic acid solution. Take 6g of trichloroacetic acid, after adding chloroform 25mL dissolved, add 0.5mL30% hydrogen peroxide solution,
Shake, that was.
A.2.2.2.7 potassium carbonate solution. 150g/L.
A.2.2.2.8 antimony potassium pyrophosphate solution. Take 2g antimony potassium pyrophosphate dissolved in 85mL water, and rapidly cooled potassium hydroxide solution was added 10mL
Solution (3 → 20); placing 24h, diluted with filtered, add water to 100mL.
A.2.2.2.9 methylene blue indicator solution. 5g methylene blue dissolved in 95% ethanol, was diluted to 1000mL with 95% ethanol.
A.2.2.3 Identification of
A.2.2.3.1 sample solution (20mg/mL) at 25 ℃ capable of reducing an alkaline copper tartrate solution more quickly when heated.
A.2.2.3.2 at 40 ℃ solution was acidified with 2mL of hydrochloric acid in 0.5mL sample solution (20mg/mL), was added 4 drops of methylene blue indicator solution,
The temperature of the inner deep blue 3min faded.
A.2.2.3.3 with 15mL1.20 TCA was dissolved 15mg sample, add about 200mg of activated carbon, violently shaking 1min, with
Small daisy filter paper, if necessary, until clear again filtered, to the filtrate was added 1 drop 5mL pyrrole was slowly stirred to dissolution, and then set
50 ℃ water bath, the produce blue.
A.2.2.3.4 presents the characteristics of the sodium salt of the reaction
A.2.2.3.4.1 take platinum wire, with hydrochloric acid wet, dipped into the sample combustion in a colorless flame, the flame that was bright yellow.
A.2.2.3.4.2 taking about 100mg sample set 10mL test tube, add 2mL dissolved in water, add 2mL potassium carbonate solution, heated to boiling, should
Must not precipitate formed; add 4mL antimony potassium pyrophosphate solution, heated to boiling; home ice water to cool, if necessary, the inner wall of the tube with a glass rod friction, should
Dense precipitate formed.
A.3 Determination of sodium ascorbate (C6H7NaO6) content (dry basis) of
A.3.1 Method summary
Sample and standard iodine titration solution redox reaction, depending on the color of iodine standard titrant determine the titration end point.
A.3.2 Reagents and materials
A.3.2.1 iodine.
A.3.2.2 phosphorus pentoxide.
A.3.2.3 sulfuric acid solution. Take sulfuric acid 57mL, slowly inject the right amount of water, cooled to room temperature, diluted with water to 1000mL, shake.
A.3.2.4 standard iodine titration solution. c (
2I2
) = 0.1mol/L.
A.3.2.5 starch indicator solution. 10g/L.
A.3.3 Analysis step
He said phosphorus pentoxide drying 24h access to about 400mg sample, accurate to 0.0002g, with 100mL of cold distilled water and boiling
25mL of a mixture of sulfuric acid solution to dissolve immediately with 0.1mol/L of iodine titration standard solution titration, add starch indicator solution 3mL near the end
Until the solution was blue in the 30s is not refundable.
A.3.4 Calculation Results
Sodium ascorbate (C6H7NaO6) content (dry basis) of the mass fraction w1, according to equation (A.1) Calculated.
w1 =
1000 × c × M
m1 ×
100% (A.1)
Where.
Volume V --- sample consume iodine standard solution titration, in milliliters (mL);
1000 --- conversion factor;
C --- iodine concentration standard titration solution, expressed in moles per liter (mol/L);
--- The M molar mass of sodium ascorbate in grams per mole (g/mol), [M (
2C6H7NaO6
) = 99.05)];
m1 --- sample mass, in grams (g).
This method two parallel determination results relative deviation of not more than 0.3%.
A.4 Determination of loss on drying
A.4.1 Instruments and Equipment
Oven, the sensitivity can be controlled in ± 2 ℃, equipped with a thermometer, oven thermometer inserted into the depth of the ball and the mercury should be tested in the same sample
The horizontal plane.
A.4.2 Analysis step
Weigh about 3g samples, accurate to 0.0001g, and placed under the same conditions as the sample was dried to constant weight flat weighing bottle, accurately weighed,
At 105 ℃ ± 2 ℃ conditions dried to constant weight, calculated from the loss on drying weight loss and sample weight.
A.4.3 Calculation Results
Loss on drying mass fraction w2, according to equation (A.2) Calculated.
w2 =
m2-m3
m4 ×
100% (A.2)
Where.
m2 --- weighing bottle and sample mass before drying, in grams (g);
m3 --- weighing bottle and sample mass after drying, in grams (g);
m4 --- sample mass, in grams (g).
A.5 Specific rotation (dry basis) αm (20 ℃, D) Determination
A.5.1 Instruments and Equipment
Polarimeter.
A.5.2 Analysis step
Said phosphorus pentoxide drying 24h access to about 5g sample, accurate to 0.002g, add water to 50mL, using GB/T 613 method
Determination.