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GB 1886.213-2016 English PDF

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GB 1886.213-2016: National Food Safety Standard -- Food Additives -- Sulfur dioxide
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Basic data

Standard ID GB 1886.213-2016 (GB1886.213-2016)
Description (Translated English) National Food Safety Standard -- Food Additives -- Sulfur dioxide
Sector / Industry National Standard
Classification of Chinese Standard X40
Word Count Estimation 8,889
Date of Issue 2016-08-31
Date of Implementation 2017-01-01
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 1886.213-2016: National Food Safety Standard -- Food Additives -- Sulfur dioxide

---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 - Sulfur dioxide) National Standards of People's Republic of China National standards for food safety Food Additives Sulfur Dioxide 2016-08-31 released 2017-01-01 Implementation People's Republic of China National Health and Family Planning Commission released National standards for food safety Food Additives Sulfur Dioxide

1 Scope

This standard is applicable to the absorption method, pure oxygen combustion sulfur method, sulfur trioxide - sulfur method of food additives liquid sulfur dioxide or absorption method Of the food additive sulfur dioxide solution.

2 molecular formula and relative molecular mass

2.1 Molecular formula SO2 2.2 Relative molecular mass 64.06 (according to.2013 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 The project requires a test method Color and colorless State gas or liquid The liquid sulfur dioxide is sampled according to the provisions of 4.2 of GB/T 3637-2011 In natural light to observe the color and state; sulfur dioxide solution can be directly observed 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 project index Liquid sulfur dioxide sulfur dioxide solution Testing method Sulfur dioxide content (SO2), w /% ≥99.9 6.0 ~ 7.0 Appendix A, A.4 Lead (Pb)/(mg/kg) ≤ 2.0 - Appendix A A.5 Selenium (Se)/(mg/kg) ≤ 20.0 2.0 Appendix A A.6 Arsenic (As)/(mg/kg) ≤ 2.0 0.20 A.7 in Appendix A Table 2 (continued) project index Liquid sulfur dioxide sulfur dioxide solution Testing method Iron (Fe)/(mg/kg) ≤ - 5.0 Appendix A A.8 Moisture, w /% ≤ 0.05 - Appendix A, A.9 Nonvolatile matter, w /% ≤ 0.05 - Appendix A. A.10 Chloride (in terms of Cl)/(mg/kg) ≤ - 5 Appendix A A.11 Heavy metals (Pb)/(mg/kg) ≤ - 2 GB 5009.74 Residue on ignition (mg/kg) ≤ - 50 Appendix A. A.12

Appendix A

Testing method A.1 Warning Sulfur dioxide gas on the eyes, throat and respiratory system has a strong corrosive, the operation should be in a well-ventilated state, The author should do personal protection (such as wearing chemical safety glasses, rubber oil gloves, if necessary, wear filter gas masks). Some of the reagents used in this test method are toxic or corrosive and the operator should be careful to spill on the skin and immediately use water Rinse, severe should be treated immediately. When using flammable products, it is forbidden to use open flame. 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 provides three levels of water. test The standard solution, impurity standard solution, preparation and preparation used in the test shall be classified according to GB/T 601, GB/T 602, GB/T 603. The solution used in the experiment, when not specified with the preparation of the solvent, refers to the aqueous solution. A.3 Identification test A.3.1 Reagents and materials A.3.1.1 Mercury bromide test paper. A.3.1.2 Starch - Potassium Iodide Test Paper. A.3.2 Identification method A.3.2.1 Identification of sulfur-containing substances The sample can make the wet mercury bromide test paper black. A.3.2.2 Identification of oxidizing properties The sample can make the wet starch - potassium iodide test paper blue. A.4 Determination of sulfur dioxide (SO2) content A.4.1 Differential subtraction (for liquid sulfur dioxide) Sulfur dioxide (SO2) content of the mass fraction w1, according to formula (A.1) calculation. w1 = 100% - (w3 w4) (A.1) Where. w3 --- moisture content as measured by A.9,%; w4 ---% of the nonvolatile matter measured by A.10%. The results are fixed to 1 decimal place. A.4.2 Volumetric method (for sulfur dioxide solution) A.4.2.1 Methodological Summary In a weakly acidic solution, the sulfite ions are oxidized to sulfuric acid ions with iodine. Starch as an indicator, with sodium thiosulfate standard drops Set the solution to titrate excess iodine. A.4.2.2 Reagents and materials A.4.2.2.1 Iodine standard solution. c ( 2I2 ) = 0.1 mol/L. A.4.2.2.2 sodium thiosulfate standard titration solution. c (Na2S2O3) = 0.1mol/L. A.4.2.2.3 Soluble Starch Solution. 5 g/L. A.4.2.3 Analysis steps Remove 50mL iodine standard solution, placed in iodine bottle. Weigh about 2.0g sample, accurate to 0.0002g, add to the iodine bottle, add Plug, water seal, placed in the dark 5min. Titration with sodium thiosulfate standard titration solution, near the end, add 2mL of soluble starch solution, Continue titration until the solution blue disappears as the end point. While the blank test. Blank test In addition to the sample, the other types of operation and addition of reagents (except for the standard titration solution) and the same test sample. A.4.2.4 Calculation of results Sulfur dioxide (SO2) content of the mass fraction w2, according to formula (A.2) calculation. w2 = V1-V2 () × c × M m1 × 1000 × 100% (A.2) Where. V1 - Volume of sodium thiosulfate standard titration solution consumed in blank test, in milliliters (mL); V2 --- titration test solution consumed by sodium thiosulfate standard titration solution in milliliters (mL); c - the concentration of sodium thiosulfate standard titration solution in moles per liter (mol/L); M - the molar mass of sulfur dioxide in grams per mole (g/mol) [M ( 2SO2 ) = 32.03]; m1 --- the quality of the sample, in grams (g); 1000 --- conversion factor. The results of the test are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions Value is not greater than 0.2%. A.5 Determination of lead (Pb) A.5.1 Reagents and materials Nitric acid. A.5.2 Instruments and equipment Boiling water bath. A.5.3 Analysis steps A.5.3.1 Sampling After sampling according to 4.1.1 of GB/T 3637-2011, 50 g of the sample was weighed and placed in a conical flask. A.5.3.2 Preparation of Test Solution A. Place the conical flask with the sample in a boiling water bath (during heating, add a small amount of water to prevent the sample from drying) Oxidation of sulfur so far. Add 3mL nitric acid and 10mL water, heated with electric furnace for 15min, should not be evaporated. After cooling the cone in the bottle The solution was transferred to a 100 mL volumetric flask, diluted with water to a graduated volume, shaken and removed from 10 mL to 100 mL volumetric flask, diluted with water Scale, shake. This solution is the test solution A, for the sample lead content and the determination of selenium content. A.5.3.3 Determination The test solution A was measured according to GB 5009.12. A.6 Determination of selenium (Se) Determination of liquid sulfur dioxide sample. Remove 0.5 mL of test solution A, the following according to the provisions of GB 5009.93-2010 operation And measured. Sulfur dioxide solution sample determination. Weigh 2g sample, accurate to 0.001g, placed in a beaker, add 10mL of water, in the boiling water bath Evaporated to a volume of about 5mL, with 5mL hydrochloric acid solution (6mol/L) to dissolve the residue, placed in the electric furnace heated to produce white smoke after cooling, turn Transferred to 100mL volumetric flask, diluted with water to the mark, shake. Remove 10mL of the solution, the following according to the provisions of GB 5009.93-2010 To operate and measure. A.7 Determination of arsenic (As) Liquid sulfur dioxide sample determination. according to the provisions of GB 5009.76 test solution A determination. Sulfur dioxide solution sample determination. Weigh 40g sample, accurate to 0.01g, placed in the electric furnace to keep the micro-boiling to the test solution to the volume About 5mL, cooling, according to the provisions of GB 5009.76 determination. A.8 Determination of iron (Fe) A.8.1 Reagents and materials A.8.1.1 Ammonia solution. 10%. A.8.1.2 Ascorbic acid solution. 100 g/L. A.8.1.3 Acetic acid-sodium acetate buffer solution (pH ≈ 3). A.8.1.4 1,10-phenanthroline solution. 2 g/L. A.8.1.5 iron standard use of solution. 1mL solution containing iron (Fe) 0.010mg, with a pipette to remove 10mL according to GB/T 602 preparation of iron Standard solution, placed in 100mL volumetric flask, diluted with water to the mark, shake. The solution is now used. A.8.1.6 Precision pH test paper. A.8.2 Analysis steps Weigh 2g ± 0.001g sample, placed in 50mL colorimetric tube, add 5mL water, dropping ammonia solution to test solution pH is about 3 (with Precision pH test paper test), add 2mL ascorbic acid solution, shake, add 10mL acetic acid - sodium acetate buffer solution (pH ≈ 3), plus 2mL1,10-phenanthroline solution, add water to 50mL after shaking, placed 5min. The red color should not be deeper than the standard colorimetric solution. Standard colorimetric solution preparation. Remove 1mL iron standard using the solution, diluted with water to 10mL, the same with the test solution at the same time. A.9 Determination of moisture After sampling according to 4.1.1 of GB/T 3637-2011, 50 g of the sample was weighed by reduction and placed in a dry Karl Fischer Set the cup, accurate to 0.01g. The following according to GB 5009.3-2010 fourth Fakar Fischer method determination. The moisture content of the water w3 dollars. A.10 Determination of nonvolatile matter A.10.1 Analysis steps After sampling according to 4.1.1 of GB/T 3637-2011, 50 g of the sample was weighed by reduction, and the mixture was dried in a desiccator for 1 h 250 mL Erlenmeyer flask. The conical flask is evaporated on a steam bath until the odorless sulfur is escaped. Replace the residual steam in the bottle with dry air. use Filter the paper to dry the outer wall of the conical flask, placed in a dry dryer, cooling 1h, weighing the quality, accurate to 0.01g. A.10.2 Calculation of results The mass fraction w4 of the nonvolatile matter is calculated according to equation (A.3) w4 = m2-m3 m4 × 100% (A.3) Where. m2 - the quality of the conical flask and nonvolatile matter in grams (g); m3 --- the quality of the conical flask, in grams (g); m4 --- the quality of the sample, in grams (g). The results of the test are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions Value is not greater than 0.2%. A.11 Determination of chloride (in terms of Cl) A.11.1 Methodological Summary In the acidic medium by adding silver nitrate solution, and chloride ions to generate white silver chloride suspension, compared with the standard turbid solution. A.11.2 Reagents and materials A.11.2.1 Nitric acid solution. 1 5. A.11.2.2 Silver nitrate solution. 17 g/L. A.11.2.3 Chloride standard solution. 1mL solution containing chlorine (Cl) 0.1mg. A.11.3 Analysis steps Weigh 10.00g ± 0.01g sample, placed in a beaker to cover the surface of the dish, heated to slightly boiling and keep 5min, the beaker in the remaining solution Into the 50mL colorimetric tube, adjust the solution volume of about 40mL, add 5mL nitric acid solution and 1mL silver nitrate solution, diluted with water To the scale, shake, placed 5min after turbidity. The turbidity should not exceed the turbidity of the standard turbid solution. Standard turbid solution. take 0.5mL chloride standard solution, placed in the colorimetric tube, adjust the solution volume of about 40mL, add 5mL of nitrate Acid solution and 1mL silver nitrate solution, diluted with water to the mark, shake, placed 5min after turbidity. A.12 Determination of burning residue A.12.1 Instruments and equipment A.12.1.1 porcelain evaporative dish. 100mL. A.12.1.2 High temperature furnace. can control the temperature at 800 ℃ ± 25 ℃. A.12.2 Analysis steps Weigh 20.00g ± 0.01g sample, placed in advance at 800 ℃ ± 25 ℃ burning to the quality of constant porcelain evaporates, in the boiling water bath on the steam Sent to dry, into the high temperature furnace, the temperature rose to 800 ℃ ± 25 ℃ in the high temperature furnace burning to the constant quality, cooling, weighing. A.12.3 Calculation of results The mass fraction w6 of the burning residue is calculated according to formula (A.4) w6 = m6 m5 × 100% (A.4) Where. m6 --- the quality of the residue after burning, in grams (g); m5 --- the quality of the sample, in grams (g). The results of the test are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions Value is not greater than 0.2%.

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