GB 25591-2010 English PDF

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GB 25591-2010: The national food safety standards of food additives composite leavening agent
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Basic data

Standard ID: GB 25591-2010 (GB25591-2010)
Description (Translated English): The national food safety standards of food additives composite leavening agent
Sector / Industry: National Standard
Classification of Chinese Standard: X42
Classification of International Standard: 67.220.20
Word Count Estimation: 13,134
Date of Issue: 2010-12-21
Date of Implementation: 2011-02-21
Regulation (derived from): Ministry of Health Bulletin No. 19 of 2010
Issuing agency(ies): Ministry of Health of the People's Republic of China
Summary: This Chinese standard applies to GB2760 allows the use of food additives mixed by physical methods composite leavening agent (also known as baking powder, foam powder, baking powder).

GB 25591-2010: The national food safety standards of food additives composite leavening agent

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The national food safety standards of food additives composite leavening agent National Food Safety Standard Food additives Composite leavening agent Issued on. 2010-12-21 2011-02-21 implementation National Standards of People's Republic of China People's Republic of China Ministry of Health issued

Foreword

The Standard Appendix A, Appendix B and Appendix C are normative appendices, Appendix D is an informative annex. National Food Safety Standard Food additives Composite leavening agent

1 Scope

This standard applies to GB 2760 allows the use of food additives mixed by physical methods from the composite leavening agent (also known as bubble play Powder, foam powder, baking powder).

2 Normative references

The standard file referenced in the application of this standard is essential. For dated references, only the edition date of the note Apply to this standard. For undated references, the latest edition (including any amendments) applies to this standard.

3 Technical requirements

3.1 Sensory requirements. comply with Table 1. Table 1 Sensory requirements Project requires test methods Color White take appropriate sample is placed in 50mL beaker, natural Light to observe the color and texture. Organization Status powder 3.2 Physical indicators. to comply with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Carbon dioxide gas generation amount (standard state), mL/g ≥ 35.0 Appendix A A.3 Heating loss, w /% ≤ 3.0 Appendix A A.4 Nitric acid insoluble matter, w /% ≤ 2.0 A.5 in Appendix A Arsenic (As)/(mg/kg) ≤ 2 Appendix A A.6 Heavy metals (Pb)/(mg/kg) ≤ 20 Appendix A A.7 pH (10g/L solution) 5.0-9.0 Appendix A A.8 Fineness (180μm test sieve) /% ≥ 95.0 A.9 in Appendix A

4 Other

Products should be indicated on the packaging and labeling of the aluminum content, test methods, see Appendix D.

Appendix A

(Normative) Testing method A.1 Warning Reagents The standard test methods used for toxic or corrosive, be careful when operating! As should be immediately splashed on the skin Rinsed with water, severe cases should be treated immediately. A.2 General Provisions The standard test methods used in the reagents and water in the absence of other specified requirements, refer to analytically pure reagents and GB/T 6682-2008 in Three water regulations. Test with the standard titration solution, impurity standard solution, preparations and products, did not indicate when the other requirements, according HG/T 3696.1, HG/T 3696.2, the provisions prepared HG/T 3696.3 of. A.3 Determination of the amount of carbon dioxide gas generation A.3.1 Method summary At 75 deg.] C water bath with dilute hydrochloric acid to react with the sample, release of carbon dioxide gas into the solution containing the amount of the replacement pipe, to a gas measurement Product, and then converted to a standard state volume of gas. A.3.2 Reagents and materials A.3.2.1 hydrochloric acid solution. 12. A.3.2.2 replacement solution. Weigh 100 g of sodium chloride, in a beaker, water was added to dissolve 350 mL, together with 1 g of sodium hydrogen carbonate and 2 drops of Methyl orange indicator solution, a solution of hydrochloric acid solution until the solution was slightly red. A.3.3 Instruments and Equipment Carbon dioxide gas generation amount measuring means, Figure A.1. A.3.4 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 inside the home In other solutions, the amount of gas pipe 6 align scale to zero. 4 through the condenser cooling water, rotary three-way valve 5, so that the amount of gas pipe 4 and the condenser 6 communication. Remove the gas generating bottle 1, was added 100 mL of water, and with a soft paper wrapped about 1 g (accurate to 0.0002g) sample into the gas generator Students with a round-bottomed flask, the flask was quickly connected, placed in a water bath at 75 ℃ was heated, reducing the level bottle 7, from the dropping funnel was added 20 3 mL hydrochloric acid solution, immediately close the valves of a dropping funnel, slowly shaking continued gas generating bottle. 3 min after appropriately adjusting the position of standard bottles 7, when the amount of the gas pipe 6 and 7 bottles of liquid level to strike a balance scale reading level V (mL) and reading a thermometer 8 simultaneous determination of atmospheric pressure. Isolated and atmospheric vapor pressure according to Appendix B and Appendix C correction value. Make a blank test as described in step. In addition to the blank test without the sample, the addition of reagents and other operations of the kind and amount (other than the standard titration solution) with the same Test. Figure A.1 generation amount of carbon dioxide gas measuring device A.3.5 Calculation Results The amount of gas in the standard state per gram of sample volume of carbon dioxide generated by w1 and its value in mL/g according to formula (A.1) Calculated. tm ppVVw ×× - × - = 3.101 ) () (00 1 (A.1) Where. When the amount of gas pipe V-- measurement sample surface scale value in milliliters (mL); When the amount of gas V0-- blank test tube level scale values in milliliters (mL); Correction p-- value when measured after the atmospheric pressure, expressed in kilopascals (kPa); p0 - the value t ℃ when the water vapor pressure after correction, in units of kilopascals (kPa); T-- numerical thermometer readings when measured in degrees Celsius (℃); Numerical m-- sample mass, expressed in grams (g); Numerical 101.3-- standard state of atmospheric pressure, expressed in kilopascals (kPa); 273-- value under standard conditions of temperature, in degrees Celsius (℃). Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 3 mL/g. A.4 Determination of loss on heating A.4.1 Instruments and Equipment A.4.1.1 electric oven. A.4.1.2 weighing bottle. Φ50 mm × 30 mm. A.4.2 Analysis step Weigh about 5 g sample was placed in a dry to a constant mass of 105 ℃ ± 2 ℃ weighing bottle, accurate to 0.000 2 g, moved into the electric constant Temperature oven at 60 ℃ ± 2 ℃ heating 2 h. After cooling to room temperature in a desiccator and weigh. A.4.3 Calculation Results Heating loss mass fraction w2 and its value is expressed in%, according to formula (A.2) Calculated. 0212 × - = m mmw (A.2) Where. m1-- heating value before weighing bottle and sample mass, expressed in grams (g); After heating value m2-- weighing bottle and sample mass, expressed in grams (g); Numerical m-- sample mass, expressed in grams (g). Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.1%. 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 at 550 ℃ ± 25 ℃. A.5.3 Analysis step Weigh about 5g samples, accurate to 0.01g, placed 250 mL beaker was slowly added 30 mL of hot water about 80 ℃, the shaking mixing 3 After min, the insoluble material was filtered, washed thoroughly with boiling water. Then with a glass rod to poke a hole in the bottom of the filter paper, plastic head dropper with 40 mL of nitric acid solution The insolubles were completely washed into another 250 mL beaker and heated to boiling for 1 min. Serve hot with speed quantitative filter paper, wash with boiling water to wash Not until the liquid is acidic (blue red litmus paper test not significant). The filters have been burned together with the residue to be transferred to the quality of 550 ± 25 ℃ Constant porcelain crucible in the furnace charring, burning to constant mass at 550 ℃ ± 25 ℃ high temperature furnace. A.5.4 Calculation Results Nitric acid insoluble matter mass fraction w3 and its value is expressed in%, according to formula (A.3) Calculated. 0013 × - = m mmw (A.3) Where. After m1-- burning crucible together with the value of the residue mass in grams (g); m0-- crucible quality value in units of grams (g); Numerical m-- sample mass, expressed in grams (g). Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.1%. A.6 Determination of Arsenic A.6.1 Reagents and materials With GB/T 5009.76-2003 of Chapter 9. A.6.2 Instruments and Equipment With GB/T 5009.76-2003 Chapter 10. A.6.3 Analysis step Weigh 1.00g ± 0.01g sample and put arsenic given the wide mouth bottle, add 50 mL of water, shake well. Added 5 mL of hydrochloric acid, 1 g iodine Potassium and 2 mL stannous solution, shake. Place 5 min, add 3 g of arsenic-free zinc, has been installed immediately lead acetate cotton and mercuric bromide test Paper glass tube plugged onto the jar in a dark place 1 h. Remove with standard Gutzeit comparing pigmentation of samples are not deeper than the standard Stain. Preparation limits solution. Pipette 2.00 mL with arsenic standard solution [1 mL solution of arsenic (As) 0.001 mg], the place given arsenic Jar, and treated in the same sample at the same time. 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. pH≈3.5. Weigh 25.0 g of ammonium acetate were dissolved in 25 mL of water, add 45 mL hydrochloric acid solution (6 mol/L), adjusted with dilute hydrochloric acid or dilute ammonia water to pH 3.5, diluted to 100 mL. 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. 1 mL solution containing lead (Pb) 0.01 mg. Pipette Pipette 1.00 mL of lead standard solution according to GB/T 3696.2 prepared, placed in 100 mL volumetric flask, add nitric acid solution (1199) to the mark. A.7.2 Instruments and Equipment A.7.2.1 quartz crucible. 50 mL. Or hard glass evaporating dish. 100 mL. All crucibles, required prior to the use of a nitric acid solution of glassware (15) soaked overnight, repeatedly washed with water, and finally washed with deionized water clean. A.7.2.2 Nessler colorimetric tube. 50 mL. A.7.3 Analysis step Weigh 1.00 g ± 0.01 g sample was placed in a quartz crucible or hard glass evaporating dish, add the amount of sulfuric acid infiltration sample ashing. After a small fire to sample charring, 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 ℃ ± 25 ℃ ashing is complete. Then cool, moist residue with hydrochloric acid, in a water bath and slowly evaporated to dryness. Wet with a drop of hydrochloric acid solution Run the residue, and add 10 mL of water in a water bath heated again 2 min. The solution was filtered at 50 mL colorimetric tube, washed with aqueous ammonia pH value of about 3 (with a precision pH test paper). Was added 0.5 g of hydroxylamine hydrochloride, 5 mL ammonium acetate buffer solution, shake. Added 10 mL Hydrogen sulfide saturated solution, add water to the mark. 10 min after placement, 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 2.00 mL of 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. A.8 pH measurement of A.8.1 Reagents and materials Carbon dioxide-free water. A.8.2 Instruments and Equipment pH meter. Indexing is 0.02. A.8.3 Analysis step Weigh 1.00g ± 0.01g sample was placed 250 mL beaker, add 100 mL of water, cover the surface of the dish, placed in boiling water bath for insulation 1h, Rapid cooling to room temperature, pH meter measuring the pH of the solution. Take the arithmetic mean of the parallel determination results of the measurement results. Two parallel determination results of absolute difference is not more than 0.3. A.9 Determination of fineness A.9.1 Instruments and Equipment Test sieves. R40/3 series, Φ200mm × 50mm/0.18mm, with the bottom screen and the screen cover. A.9.2 Analysis step Weigh approximately 50 g samples, accurate to 0.01g, placed installed screen at the end of the test sieve, sieve cover lid, about 90 times/min frequency of hand Workers moving sieve 2 min, and continue to beat, if there were false crude sample (reunion) phenomenon, the available horn spoon lightly crushed and sieved samples, weighed sieve Quality material, accurate to 0.01g. A.9.3 Calculation Results Fineness of 180 μm test sieve through the mass fraction w4 and its value is expressed in%, according to formula (A.4) Calculated. 014 × - = m mmw (A.4) Where. Numerical quality m1-- sieve residue in grams (g); Numerical m-- sample mass, expressed in grams (g). Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 1.0%.

Appendix B

(Normative) 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, ℃ Barometer readings, 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 4.49 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

(Normative) Water vapor pressure table (0 ℃ ~ 50 ℃) Table C.1 saturated water vapor pressure (0 ℃ ~ 50 ℃) Temperature, ℃ pressure, Pa temperature, ℃ pressure, Pa temperature, ℃ pressure, Pa 0 610.51 17 34 5319.82 1937.27 1 657.31 18 35 5623.81 2063.93 2 705.31 19 36 5941.14 2197.26 3 758.64 20 37 6275.79 2338.59 4 813.31 21 38 6619.78 2486.58 5 871.97 22 39 6991.77 2646.58 6 934.64 23 40 7375.75 2809.24 7 1001.30 24 41 7778.41 2983.90 8 1073.30 25 42 8199.73 3167.89 9 1147.96 3361.22 26 43 8639.71 27 3565.21 9101.03 1227.96 10 44 28 3779.87 9583.68 1311.96 11 45 46 10086.33 4005.20 1402.62 12 29 47 10612.98 4242.53 1497.28 13 30 48 11160.96 4493.18 1598.61 14 31 49 11735.61 4754.51 1705.27 15 32 50 12334.26 5030.50 1817.27 16 33

Appendix D

(Informative) Determination of aluminum Determination of aluminum D.1 D.1.1 Method summary Of aluminum in the sample of a known excess of EDTA disodium reaction of the complex. At a pH of about 6, xylenol orange as meaning Shows agents, zinc standard titration solution titrate excess of disodium edetate. D.1.2 Reagents and materials D.1.2.1 hydrochloric acid solution. ll. 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) = 0.02 mol/L. D.1.2.5 disodium edetate solution. c (EDTA) = 0.05 mol/L. D.1.2.6 xylenol orange indicator. 2 g/L (use of no more than 15 days). D.1.3 analysis step Preparation of test solution D.1.3.1 Weigh about 2.5 g samples, accurate to 0.0002g, placed 250 mL beaker. Add 100 mL of water and 6 mL of hydrochloric acid solution, cover the dish surface, Dissolved by heating and boiled 5 min (if necessary, filtration). After all transferred to 250 mL volumetric flask was cooled, diluted with water to the mark. D.1.3.2 Determination Pipette with a pipette 25.00 mL above test solution, placed in 250 mL conical flask, pipette 20 mL of ethylenediamine tetraacetate Sodium, put a small piece of Congo red, then dark red paper with ammonia solution was adjusted (pH≈4.5), boil 1min, was added after cooling 15 mL of acetic acid - sodium acetate buffer solution and 2 drops of xylenol orange indicator solution, titration with zinc chloride standard solution titrate to a pale pink. While doing the blank test. D.1.4 Calculation Results Aluminum content of aluminum (Al) mass fraction w5 and its value is expressed in%, according to formula (D.1) Calculated. () 1001000250/25 ) (0 5 ××× - = MVVcw (D.1) Where. V - Value zinc chloride standard titration solution volume measurement consumed in milliliters (mL); V0 - Numerical zinc chloride standard titration solution volume consumed in the blank test solution, in milliliters (mL); c - accurate zinc chloride standard titration solution concentration value in units of moles per liter (mol/L); m - mass of the sample value in units of grams (g); M - numerical molar mass of aluminum (Al), in units of grams per mole (g/mol) (M = 26.996). Take the arithmetic mean of the parallel determination results of the measurement results. Two parallel determination results is not more than 0.1% absolute difference. ......

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