GB 1886.245-2016National Food Safety Standard -- Food Additives -- Composite Leavening Agent (English PDF)

Foreword

This standard replaces GB 25591-2010 "national food safety standards for food additives composite leavening agent." this standard compared with GB 25591-2010, the main changes are as follows.

--- Standard name was changed to "national food safety standards for food additives complex leavening agent";

--- Modify the scope of the standard;

--- Revised standard technical requirements;

--- To add products into the aluminum-containing food additives and complex leavening agent is not added aluminum-containing food additives complex leavening agent;

--- Remove the index fineness;

--- Revised test methods insoluble matter content nitrate, arsenic concentration and pH.

National Food Safety Standard Food Additives complex leavening agent

1 Scope

This standard applies to GB 2760 allows the use of food additives and food materials by physical mixing method from the complex bulky Agent (also called baking powder, foam powder, baking powder).

2 Technical Requirements

3 Logo

Added aluminum-containing food additives (such as potassium aluminum sulfate, ammonium aluminum sulfate) complex product shall be marked with a leavening agent for aluminum products in the packaging and labeling (Al) content without adding an aluminum-containing food additives (such as potassium aluminum sulfate, ammonium aluminum sulfate) of complex leavening agent can be identified on the product packaging "is not added aluminum".

Appendix A

Testing method

A.1 Warning

Reagents The standard test methods used for toxic or corrosive, the operation should take appropriate safety and health practices.

A.2 General Provisions this standard reagents and water, did not indicate when the other requirements, refer to the three water analytical reagent and GB/T 6682 stipulated.

Standard Solution of the standard tests required impurity measured by standard solution, preparations and products, in the absence of other requirements specified according to GB/T 601, GB/T 602, the provisions of the preparation of GB/T 603's. The solution in a solvent which does not indicate by when formulated, refers to an aqueous solution.

A.3 Determination of the amount of carbon dioxide gas generation A.3.1 Reagents and materials A.3.1.1 hydrochloric acid solution. 12.

A.3.1.2 replacement solution. Weigh 100g of sodium chloride and placed in a beaker, 350mL of water was added to dissolve, plus 1g of sodium bicarbonate and 2 drops of methyl orange indicator solution, a solution of hydrochloric acid solution until the solution was slightly red.

A.3.2 Instruments and Equipment Carbon dioxide gas generating capacity measuring device shown in Figure A.1.

Millimeters

Explanation.

1 --- gas generating round-bottomed flask;

2 --- a water bath;

3 --- a dropping funnel;

4 --- condenser;

5 --- three-way valve;

6 --- have the amount of gas jacket tube;

7 --- standard bottle;

8 --- thermometer;

--- Stopper. 9;

10 --- hose.

Figure A.1 generation amount of carbon dioxide gas measuring device

A.3.3 Analysis step

As shown in Figure A.1 connecting the portion of the device. Three-way rotary valve 5, the apparatus through the atmosphere, lifting the standard of bottle 7, to move the internal displacement Solution, the amount of gas pipe alignment 6 scale to zero. 4 through the condenser cooling water, rotary three-way valve 5, so that the amount of gas tube condenser 4 and 6 with through. Remove the gas generating round-bottom flask 1, was added 100mL of water, and with a soft paper wrapped around 1g sample, accurate to 0.0002g. Put in Round bottom flask with a gas generator, the flask was quickly connected, placed in a water bath at 75 °C was heated, reducing the level bottle 7, added from the dropping funnel 3 20mL hydrochloric acid solution into the immediate closure of the valve a dropping funnel, slowly shaking continued gas generating bottle. 3min after suitably adjusted standard bottle 7 position, when the amount of the gas pipe 6 and 7 bottles of liquid level to strike a balance scale reading level V1 (mL) and reading a thermometer 8, with Measured atmospheric pressure. Isolated and atmospheric vapor pressure according to Appendix B and Appendix C correction value. Steps above blank test. air White test samples without addition, other operating and kind and amount of addition of reagents (except standard titration solution) with the same Test.

A.3.4 Calculation Results Carbon dioxide gas generation amount per gram of the sample under the standard volume of carbon dioxide generated by w1 count milliliters per gram (mL/g), According to formula (A.1) Calculated.

(V1-V2) × (P1-P2)

101.3 × m1 ×

273 t

Where.

V1 --- measured amount of sample gas pipe surface scale value in milliliters (mL);

V2 --- blank test tube gas volume level scale values in milliliters (mL);

Atmospheric correction P1 --- when measured after units of kilopascals (kPa);

Vapor pressure P2 --- t °C water when corrected, in units of kilopascals (kPa);

M1 --- the quality of the sample, in grams (g);

t --- thermometer readings when measured in degrees Celsius (°C);

101.3 --- under standard conditions atmospheric pressure in units of kilopascals (kPa);

273 --- temperature under standard conditions, in units of degrees Kelvin (K).

The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference not more than 3mL/g.

A.4 Determination of loss on heating A.4.1 Instruments and Equipment A.4.1.1 electric oven. temperature can be controlled to 105 °C ± 2 °C.

A.4.1.2 weighing bottle. phi50mm × 30mm.

A.4.2 Analysis step

Weigh about 5g samples, accurate to 0.0002g, has been placed in a dry to a constant mass of 105 °C ± 2 °C weighing bottle and transferred to electric Thermostatic oven at 60 °C ± 2 °C heat 2h. After cooling to room temperature in a desiccator and weigh.

A.4.3 Calculation Results Heating loss mass fraction w2, according to equation (A.2) Calculated.

m2-m3

100% (A.2)

Where.

Mass m2 --- weighing bottle and the sample, expressed in grams (g);

Quality m3 --- dried specimen and weighing bottles in grams (g);

m4 --- sample mass, in grams (g).

The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference not more than 0.2%.

A.5 Determination of nitric acid insolubles A.5.1 Reagents and materials Nitric acid solution. 19.

A.5.2 Instruments and Equipment High temperature furnace. temperature can be controlled to 550 °C ± 25 °C.

A.5.3 Analysis step

Weigh about 5g samples, accurate to 0.01g, placed in 250mL beaker was slowly added to 30mL of water about 50 °C, shake mix After 5min, insoluble matters were filtered, with about 50 °C carbon dioxide-free water and the insolubles washed sufficiently. Then poke a glass rod in the bottom of the filter paper Holes with plastic head dropper 40mL nitric acid solution and the insolubles were completely washed into another 250mL beaker, heated to boiling 1min, hot Medium speed quantitative filter paper, rinse with boiling water to wash not significant (blue litmus paper test not significant red) until the acidity. Together with the filter paper the residue was transferred to be burned to a constant quality porcelain crucible at 550 °C ± 25 °C, charring on a hot plate at a high temperature of 550 °C ± 25 °C Burning oven to constant mass.

A.5.4 Calculation Results the mass fraction of nitric acid insoluble matter w3, according to equation (A.3) Calculated.

m5-m6

100% (A.3)

Where.

After m5 --- burning crucible together with the quality of the residue, expressed in grams (g);

m6 --- crucible mass in grams (g);

m7 --- sample mass, in grams (g).

The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference not more than 0.1%.

A.6 pH (10g/L solution) was measured A.6.1 Instruments and Equipment pH meter. accuracy 0.02.

A.6.2 Analysis step

Weigh 1.00g ± 0.01g sample is placed in 250mL beaker, add 100mL water, stir well, cover the surface of the dish, put boiling Water bath for heating insulation 10min, cooled to room temperature and the pH was measured according to the provisions of GB/T 23769 of.

The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference not more than 0.2.

A.7 Determination of heavy metals (Pb) of A.7.1 Reagents and materials A.7.1.1 sulfuric acid.

A.7.1.2 nitrate.

A.7.1.3 hydroxylamine hydrochloride.

A.7.1.4 hydrochloric acid solution. 11.

A.7.1.5 ammonia solution. 13.

A.7.1.6 ammonium acetate buffer solution. Weigh 25.0g of ammonium acetate dissolved in 25mL of water, add 45mL hydrochloric acid solution with hydrochloric acid or ammonia solution Aqueous solution to adjust the pH to 3.5, dilute to 100mL.

A.7.1.7 saturated solution of hydrogen sulfide. Hydrogen sulphide gas into carbon dioxide-free water until saturated. This solution was prepared before use.

A.7.1.8 Lead standard solution. 1mL solution containing lead (Pb) 0.01mg. Pipette Pipette 1mL according to GB/T 602 standard formulated lead Solution, placed in 100mL flask, plus (1199) nitric acid solution to the mark.

A.7.2 Instruments and Equipment A.7.2.1 quartz crucible (50 mL) or hard glass evaporating dish (100mL). Before all crucibles, glassware nitrate solution required to (15) soaked overnight with water repeatedly washed with deionized water rinse.

A.7.2.2 Nessler colorimetric tube. 50mL.

A.7.2.3 high-temperature furnace. temperature can be controlled to 550 °C ± 25 °C.

A.7.3 Analysis step

Weigh 1.00g ± 0.01g sample was placed in a quartz crucible or hard glass, add the amount of sulfuric acid after infiltrating a sample ashing, small After the fire into the sample carbonized add 2 drops of sulfuric acid and nitric acid 1mL, carefully heated until white smoke play to make, moved into the high-temperature furnace at 550 °C ± 25 °C ashing is complete. Then cool, moist residue with hydrochloric acid, in a water bath and slowly evaporated to dryness. Moist residue with a drop of hydrochloric acid solution, and add 10mL of water, in a water bath heated again 2min. The solution was filtered 50mL colorimetric tube, washed in, the solution was adjusted with ammonia a pH of about 3 (with a precision pH test paper). Was added hydroxylamine hydrochloride 0.5g, 5mL ammonium acetate buffer solution, shake. Sulfur was added 10mL Hydrogen saturated solution, add water to the mark. Place 10min later, on white background observation, color can not be deeper than the standard color of the form Solution.

Preparation of standard color solution ratio. pipette Pipette 2.00mL lead standard solution was placed in colorimetric tube, add water to a total volume of about 25mL, the following press "with ammonia to adjust the pH value of about 3" from the sample simultaneously with the same treatment.

Appendix B

Barometer readings correction the barometer should press the manual instrument calibration requirements, and then subtracted from the barometer readings given in Table B.1 correction.

Table B.1 barometer readings of temperature correction

Room temperature/°C

Barometer reading/hPa 9259509751000 1,025,105,010,751,100 10 1.51 1.55 1.59 1.63 1.67 1.71 1.75 1.79 11 1.66 1.70 1.75 1.79 1.84 1.88 1.93 1.97 12 1.81 1.86 1.90 1.95 2.00 2.05 2.10 2.15 13 1.96 2.01 2.06 2.12 2.17 2.22 2.28 2.33 14 2.11 2.16 2.22 2.28 2.34 2.39 2.45 2.51 15 2.26 2.32 2.38 2.44 2.50 2.56 2.63 2.69 16 2.41 2.47 2.54 2.60 2.67 2.73 2.80 2.87 17 2.56 2.63 2.70 2.77 2.83 2.90 2.97 3.04 18 2.71 2.78 2.85 2.93 3.00 3.07 3.15 3.22 19 2.86 2.93 3.01 3.09 3.17 3.25 3.32 3.40 20 3.01 3.09 3.17 3.25 3.33 3.42 3.50 3.58 21 3.16 3.24 3.33 3.41 3.50 3.59 3.67 3.76 22 3.31 3.40 3.49 3.58 3.67 3.76 3.85 3.94 23 3.46 3.55 3.65 3.74 3.83 3.93 4.02 4.12 24 3.61 3.71 3.81 3.90 4.00 4.10 4.20 4.29 25 3.76 3.86 3.96 4.06 4.17 4.27 4.37 4.47 26 3.91 4.01 4.12 4.23 4.33 4.44 4.55 4.66 27 4.06 4.17 4.28 4.39 4.50 4.61 4.72 4.83 28 4.21 4.32 4.44 4.55 4.66 4.78 4.89 5.01 29 4.36 4.47 4.59 4.71 4.83 4.95 5.07 5.19 30 4.51 4.63 4.75 4.87 5.00 5.12 5.24 5.37 31 4.66 4.79 4.91 5.04 5.16 5.29 5.41 5.54 32 4.81 4.94 5.07 5.20 5.33 5.46 5.59 5.72 33 4.96 5.09 5.23 5.36 5.49 5.63 5.76 5.90 34 5.11 5.25 5.38 5.52 5.66 5.80 5.94 6.07 35 5.26 5.40 5.54 5.68 5.82 5.97 6.11 6.25 Appendix C Water vapor pressure table (0 °C ~ 50 °C) Water vapor pressure (0 °C ~ 50 °C) Table C.1.

Table C.1 saturated water vapor pressure (0 °C ~ 50 °C)

Temperature/°C pressure/Pa temperature/°C pressure/Pa 610.51 3361.22 0 26 1 657.31 27 3565.21 2 705.31 28 3779.87 3 758.64 29 4005.20 4 813.31 30 4242.53 5 871.97 31 4493.18 6 934.64 32 4754.51 33 7 1001.30 5030.50 8 1073.30 34 5319.82 35 9 1147.96 5623.81 10 36 5941.14 1227.96 11 37 6275.79 1311.96 12 38 6619.78 1402.62 13 39 6991.77 1497.28 14 40 7375.75 1598.61 15 41 7778.41 1705.27 16 42 8199.73 1817.27 17 43 8639.71 1937.27 18 44 9101.03 2063.93 19 45 9583.68 2197.26 20 46 10086.33 2338.59 21 47 10612.98 2486.58 22 48 11160.96 2646.58 23 49 11735.61 2809.24 24 50 12334.26 2983.90 25 3167.89 Appendix D Determination of aluminum content D.1 Determination of aluminum content D.1.1 Method summary of aluminum in the sample of a known excess of EDTA disodium reaction of the complex. At pH = 6, the xylenol orange to indicate Agent, zinc standard titration solution titrate excess of disodium edetate.

D.1.2 Reagents and solutions D.1.2.1 hydrochloric acid solution. 11.

D.1.2.2 acetic acid - sodium acetate buffer solution. pH = 6.

D.1.2.3 ammonia solution. 11.

D.1.2.4 zinc chloride standard titration solution. c (ZnCl2) = 0.02mol/L.

D.1.2.5 disodium ethylenediaminetetraacetate (EDTA) solution. c (EDTA) = 0.05mol/L.

D.1.2.6 xylenol orange indicator. 2g/L (use of no more than 15d).

D.1.3 analysis step

Preparation D.1.3.1 sample solution Weigh about 2.5g sample, accurate to 0.0002g, placed in 250mL beaker. Add 100mL of water and hydrochloric acid solution 6mL, stamped Watch glass, dissolved by heating and boiling 5min (if necessary filter). After cooling to transfer all 250mL volumetric flask, dilute to the mark, Shake well.

D.1.3.2 Determination Pipette with a pipette 25mL of the sample solution was placed in 250mL Erlenmeyer flask, with a pipette 20mL EDTA Disodium (EDTA) solution, add a small piece of Congo red, then dark red paper with aqueous ammonia solution was adjusted (pH = 4.5), boil 1min, After cooling, 15mL of acetic acid - sodium acetate buffer solution and 2 drops of xylenol orange indicator solution, titration with zinc chloride standard titration solution to pale pink. While doing the blank test.

D.1.4 Calculation Results Aluminum content mass fraction w5, according to equation (D.1) Calculated.

c1 × (V3-V4) × M1

m8 × (25/250) × 1000 × 100% (D.1) where.

c1 --- zinc chloride standard titration solution concentration, in units of moles per liter (mol/L);

Volume V3 --- zinc chloride standard titration solution consumed in the blank sample solution, in milliliters (mL);

Volume V4 --- zinc chloride standard titration assay consumed solution in milliliters (mL);

--- Ml aluminum (Al) molar mass of the units of grams per mole (g/mol) (M = 26.996);

M8 --- the quality of the sample, in grams (g);

Volume 25 --- pipetting the sample solution, in milliliters (mL);

--- Volumetric flask of 250 milliliters (mL);

1000 --- conversion factor.

The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference not more than 0.1%.