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GB 1886.11-2016: Food additive -- Sodium nitrite
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Food additive -- Sodium nitrite
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GB 1886.11-2016
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Basic data | Standard ID | GB 1886.11-2016 (GB1886.11-2016) | | Description (Translated English) | Food additive -- Sodium nitrite | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Word Count Estimation | 8,820 | | Date of Issue | 2016-08-31 | | Date of Implementation | 2017-01-01 | | Older Standard (superseded by this standard) | GB 1907-2003 | | Regulation (derived from) | Announcement of the State Administration of Public Health and Family Planning 2016 No.11 | | Issuing agency(ies) | National Health and Family Planning Commission of the People's Republic of China, State Food and Drug Administration | GB 1886.11-2016: Food additive -- Sodium nitrite---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 safety national standard - Food additive - Sodium nitrite)
National Standards of People's Republic of China
National Food Safety Standard
Food additive sodium nitrite
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 1907-2003 "food additive sodium nitrite."
This standard compared with GB 1907-2003, the main changes are as follows.
--- Standard name was changed to "national food safety standards for food additives sodium nitrite."
National Food Safety Standard
Food additive sodium nitrite
1 Scope
This standard applies to food additive sodium dioxide gas absorption system was sodium nitrite.
2 chemical name, molecular formula and relative molecular mass
2.1 Chemical Name
Sodium nitrite
Formula 2.2
NaNO2
2.3 relative molecular mass
69.00 (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
Color
status
White or slight yellow
Rhombic
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 nitrite (NaNO2) content (dry basis), w /% ≥ 99.0 Appendix A A.4
Loss on drying, w /% ≤ 0.25a A.5 in Appendix A
Water-insoluble content (dry basis), w /% ≤ 0.05 A.6 in Appendix A
TABLE 2 (cont.)
Item Index Test Method
Arsenic (As)/(mg/kg) ≤ 2.0 GB 5009.76
Heavy metals (Pb)/(mg/kg) ≤ 20 GB 5009.74
Lead (Pb) b/(mg/kg) ≤ 10.0 Appendix A A.7
Loss on drying to a factory test results shall prevail.
b When heavy metal ≤10mg/kg when no determination of lead.
Appendix A
Testing method
A.1 Safety Tips
Test reagents having partially corrosive, toxic materials, the operation should be careful.
A.2 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
The required standard solution, impurity standard solution, preparations and products, did not indicate when the other requirements according to GB/T 601, GB/T 602,
GB/T 603 provisions of the preparation. Solution was used in the tests did not indicate what is formulated with solvent, it refers to an aqueous solution.
A.3 Identification Test
A.3.1 Reagents and materials
A.3.1.1 glacial acetic acid.
A.3.1.2 hydrochloric acid solution. 13.
A.3.1.3 ferrous sulfate solution. 80g/L.
A.3.1.4 silver nitrate solution. 17g/L.
A.3.1.5 platinum wire. one end bent into a small loop of about 4mm in diameter and the other end is wound on a glass rod.
A.3.2 Identification method
A.3.2.1 Identification of Nitrite
A.3.2.1.1 proper amount of sample solution, adding hydrochloric acid solution was heated, emit reddish-brown gas.
After taking A.3.2.1.2 1mL sample solution (3g/L), ice acetic acidic ferrous sulfate solution should be added to a freshly prepared was brown.
A.3.2.2 Identification of sodium ions
1g sample was weighed, add 20mL of water to dissolve. Platinum wire ring dipped in hydrochloric acid, to burn on the colorless colorless flame. And then dipped in the test solution
The colorless flame, the flame should was bright yellow.
A.4 Determination of sodium nitrite (NaNO2) content (dry basis) of
A.4.1 Method summary
In an acidic medium with potassium permanganate oxidation of sodium nitrite, potassium permanganate consumption according to standard titration solution of sodium nitrite calculated
content.
A.4.2 Reagents and materials
A.4.2.1 sulfuric acid solution. 15. Sulfuric acid solution was heated to about 70 ℃, the standard solution of potassium permanganate titration solution until the solution was slightly red for
only. Cooling spare.
A.4.2.2 standard potassium permanganate titration solution. c 15KMnO4
÷ = 0.1mol/L.
A.4.2.3 sodium oxalate standard titration solution. c 12Na2C2O4
÷ = 0.1mol/L. Weigh about 6.7g sodium oxalate and dissolved in 300mL (1
29) sulfuric acid solution (formulated in the same way A.4.2.1), diluted with water to 1000mL, shake. Calibration standard solution titration with potassium permanganate.
A.4.3 Analysis step
Weigh 2.5g ~ 2.7g sample, accurate to 0.0002g, set 500mL flask, add water to dissolve and dilute to the mark, shake
uniform. In 250mL Erlenmeyer flask with about 40mL burette dropping potassium permanganate standard titration solution. 10mL sulfuric acid solution was added, with
Pipette pipette 25mL test solution, heated to about 40 ℃. Pipette added 10mL sodium oxalate standard titration solution, heated to
70 ℃ ~ 80 ℃, continue to titrate with potassium permanganate standard titration solution until the solution was pink and maintain 30s not disappeared.
A.4.4 Calculation Results
Sodium nitrite (NaNO2) content (dry basis) of the mass fraction w1, according to equation (A.1) Calculated.
w1 =
(C1 × V1-c2 × V2) × M
m ×
500 × 1-
w2
÷ × 1000
× 100% (A.1)
Where.
Concentration c1 --- potassium permanganate standard titration solution, expressed in moles per liter (mol/L);
Volume of standard potassium permanganate titration V1 --- titration test solution was added and the solution consumed, in milliliters (mL);
Sodium oxalate concentration c2 --- standard titration solution, expressed in moles per liter (mol/L);
Pipette grass volume V2 --- sodium standard titration solution, in milliliters (mL);
w2 --- A.5 content by determination of loss on drying;
M --- the quality of the sample, in grams (g);
M --- and 1.00mL standard potassium permanganate titration solution c 15KMnO4
÷ = 1.000mol/Lé
êê
úú equivalent in grams Asia
Sodium nitrate molar mass in grams per mole (g/mol), M
2NaNO3
÷ = 34.50é
êê
úú.
The results parallel arithmetic mean of the measurement results shall prevail. In two independent determination results obtained under repeatability conditions absolute difference
Not more than 0.2%.
A.5 Determination of loss on drying
A.5.1 Instruments and Equipment
A.5.1.1 weighing bottle. Φ500mm × 30mm.
A.5.1.2 electric oven. the temperature can be controlled at 105 ℃ ~ 110 ℃.
A.5.2 Analysis step
Previously used at 105 ℃ ~ 110 ℃ dried weighing bottle Weigh about 5g samples, accurate to 0.0002g, ℃ ~ 110 ℃ power to 105
Oven dried to constant weight.
A.5.3 Calculation Results
Loss on drying mass fraction w2, according to equation (A.2) Calculated.
w2 =
m1-m2
m1 ×
100% (A.2)
Where.
After m2 --- mass of dry sample in grams (g);
m1 --- sample mass, in grams (g).
The results parallel arithmetic mean of the measurement results shall prevail. In two independent determination results obtained under repeatability conditions absolute difference
Not more than 0.005%.
A.6 Determination of water-insoluble content (dry basis) of
A.6.1 Reagents and materials
A.6.1.1 hydrochloric acid.
A.6.1.2 starch - iodide test paper.
A.6.2 Instruments and Equipment
A.6.2.1 crucible filter. filter plate pore size 5μm ~ 15μm.
A.6.2.2 electric oven. the temperature can be controlled at 105 ℃ ~ 110 ℃.
A.6.3 Analysis step
It weighs about 100g samples, accurate to 0.1g, placed in 500mL beaker, add 300mL water dissolved by heating. Used to advance
At 105 ℃ ~ 110 ℃ dried glass crucible sand filtration, washed with hot water until no nitrite ion far (take 20mL washing liquid, add two drops
Hydrochloric acid, starch - iodide test paper check). Placed 105 ℃ ~ 110 ℃ electric oven dried to constant weight.
A.6.4 Calculation Results
Water-insoluble content (dry basis) of the mass fraction w3, according to equation (A.3) Calculated.
w3 =
(M3-m4)
m5 × 1-
w2
× 100% (A.3)
Where.
M3 --- quality glass sand crucible in grams (g);
Quality m4 --- water insoluble sand and glass crucible, in grams (g);
w2 --- A.5 content by determination of loss on drying;
m5 --- sample mass, in grams (g).
The results parallel arithmetic mean of the measurement results shall prevail. In two independent determination results obtained under repeatability conditions absolute difference
Not more than 0.005%.
A.7 Lead (Pb) Determination
A.7.1 Method summary
With GB/T 9723-2007 Chapter 4.
A.7.2 Reagents and materials
A.7.2.1 hydrochloric acid.
A.7.2.2 Lead standard solution. 1mL solution containing 0.010mg lead. 602 after preparation according to the provisions of GB/T , using a pipette, take 10mL
Solution, placed in 100mL flask, diluted with water to the mark. This solution was formulated before use.
A.7.3 Instruments and Equipment
With GB/T 9723-2007 Chapter 6.
A.7.4 Analysis step
A.7.4.1 draw the curve
Proceed as specified in 7.2 of GB/T 9723-2007.
In a series of 50mL volumetric flask, were added 0mL, 0.5mL, 1.0mL, 1.5mL, 2.0mL, 3.0mL lead standard solution
Diluted with water to the mark.
We will adjust the instrument to the best working conditions in the 283.3nm wavelength, zero water, measuring the absorbance of each solution. To lead ion concentration
As abscissa and ordinate corresponding absorbance, drawing working curve.
A.7.4.2 Measurement
Weigh 1g sample, accurate to 0.01g, a 50mL volumetric flask, shake. Simultaneous determination of the standard solution.
A.7.5 Calculation Results
Lead (Pb) mass fraction w4, in milligrams per kilogram (mg/kg), according to equation (A.4) Calculated.
w4 =
m6 × 1000
m7
(A.4)
Where.
m6 --- quality check was lead from the standard curve, in milligrams (mg);
M7 --- the quality of the sample, in grams (g);
1000 --- conversion factor.
The results parallel arithmetic mean of the measurement results shall prevail. In two independent determination results obtained under repeatability conditions absolute difference
Not more than 1mg/kg.
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