GB 25589-2010 English PDFUS$319.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 25589-2010: National food safety standards of food additives potassium bicarbonate Status: Obsolete
Basic dataStandard ID: GB 25589-2010 (GB25589-2010)Description (Translated English): National food safety standards of food additives potassium bicarbonate Sector / Industry: National Standard Classification of Chinese Standard: X42 Classification of International Standard: 67.220.20 Word Count Estimation: 8,814 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 the ion exchange membrane potassium hydroxide as raw materials produced by the second carbonization food additive potassium bicarbonate. GB 25589-2010: National food safety standards of food additives potassium bicarbonate---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.National food safety standards of food additives potassium bicarbonate National Food Safety Standard Food additive potassium bicarbonate 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 ForewordAppendix A of this standard is a normative appendix. National Food Safety Standard Food additive potassium bicarbonate1 ScopeThis standard applies to the ion exchange membrane potassium hydroxide as a raw material by the second carbonization production of food additives potassium bicarbonate.2 Normative referencesThe standard file referenced in the application of this standard is essential. For dated references, only the edition date of the note This applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard.3 formula and relative molecular massFormula 3.1 KHCO3 3.2 relative molecular mass 100.11 (according to 2007 international relative atomic mass) 4. Technical Requirements 4.1 Sensory requirements. comply with Table 1. Table 1 Sensory requirements Project requires test methods Color White take appropriate sample is placed in a beaker 50mL watch in natural light Observing the color and texture. Organization state crystal or powder 4.2 Physical indicators. to comply with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Total alkali content (in terms KHCO3, dry basis), w /% 99.0 ~ 101.5 Appendix A A.4 Water-insoluble, w /% ≤ 0.02 Appendix A A.5 Loss on drying, w /% ≤ 0.25 A.6 in Appendix A pH (100g/L solution) ≤ 8.6 Appendix A A.7 Heavy metals (Pb)/(mg/kg) ≤ 5 Appendix A A.8 Arsenic (As)/(mg/kg) ≤ 3 A.9 in Appendix AAppendix A(Normative) Testing method A.1 Warning Reagents The standard test methods used for toxic or corrosive, be careful when operating! As splashed on the skin should stand Rinse with plenty of water, severe cases should be treated immediately. Test used in the flammable and should not use an open flame during operation. A.2 General Provisions The standard test methods used in the reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 Three water regulations. Used in the test standard titration solution, impurity standard solution, preparations and products, in the absence of other specified requirements, According to HG/T 3696.1, HG/T 3696.2, the provisions of HG/T 3696.3 of preparation. A.3 Identification Test A.3.1 Reagents and materials A.3.1.1 hydrochloric acid. A.3.1.2 ethanol. A.3.1.3 saturated solution of calcium hydroxide; Weigh 3g calcium hydroxide into 1000 mL of water, by vigorous stirring or shaking, place clarified supernatant take backup. A.3.1.4 magnesium sulfate solution. 120 g/L. A.3.1.5 ethanol solution of sodium tetraphenylborate. 34 g/L. A.3.1.6 red litmus paper. A.3.2 Analysis step A.3.2.1 Identification of carbonate A.3.2.1.1 take 50 mL 0.1 g/sample solution mL, placed in 250 mL conical flask, a solution of hydrochloric acid, which release gases. This gas guide The saturated solution of calcium hydroxide, a white turbidity. A.3.2.1.2 proper amount of 0.1 g/sample solution mL, solution of magnesium sulfate solution, namely a white precipitate. A.3.2.2 Identification of potassium ions A.3.2.2.1 proper amount of 0.1 g/sample solution mL, was added sodium tetraphenylborate ethanol solution, that is a lot of white precipitate formed. A.3.2.2.2 first to colorless combustion flame with hydrochloric acid in the colorless infiltration of platinum wire. Then dipped a little sample solution in a colorless flame combustion, By cobalt glass observe the flame was purple. A.4 Determination of Total Alkalinity A.4.1 Reagents and materials A.4.1.1 hydrochloric acid standard titration solution. c (HCl) = 0.5 mol/L. A.4.1.2 Bromocresol green - methyl red indicator solution. A.4.2 Analysis step It weighs about 1.5 g silica gel drier 4 h samples, accurate to 0.000 2 g. Placed in 250 mL conical flask, with 50 mL Dissolved in water, add 5 drops of Bromocresol green - methyl red indicator solution, titration with hydrochloric acid standard titration solution until the solution turns from green to dark red. The solution Liquid boil 2 min, after cooling, continue titration to dark red, do not fade within 30 s is the end. Make a blank test simultaneously. In addition to the blank test without the sample, but (except for standard titration solution) the type and amount of addition of reagents and other operations And determined in the same test. A.4.3 Calculation Results A total base amount of potassium bicarbonate (KHCO3) mass fraction w1 and its value is expressed in%, according to formula (A.1) Calculated. () [] 1 × - = m cMVV w (A.1) Where. Numerical hydrochloric acid standard titration solution volume V-- titration solution consumed in milliliters (mL); Numerical hydrochloric acid standard titration solution volume V0-- titration blank test solution consumed in milliliters (mL); Accurate c-- hydrochloric acid standard titration solution concentration value in units of moles per liter (mol/L); Numerical m-- sample mass, expressed in grams (g); M-- numerical molar mass of potassium hydrogen carbonate (KHCO3), in units of grams per mole (g/mol) (M = 100.1). 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 0.3%. A.5 Determination of insoluble matter A.5.1 Instruments and Equipment A.5.1.1 sand glass crucible. filter plate pore size 5 μm ~ 15 μm. A.5.1.2 electric oven. control temperature 105 ℃ ± 2 ℃. A.5.2 Analysis step Weighing about 50 g samples, accurate to 0.1 g, placed in 400 mL beaker, add 300 mL of water, heated to dissolve. Quality has been constant with Sintered glass crucible by suction filtration, washed with hot water until the filtrate was neutral (pH paper with test). The sand glass crucible placed in 105 ℃ ± 2 ℃ of Electric oven dried to a constant mass. A.5.3 Calculation Results Water-insoluble mass fraction w2 and its value is expressed in%, according to formula (A.2) Calculated. 0012 × - = m mm w (A.2) Where. Numerical m1-- debris and glass sand crucible mass in grams (g); Numerical m0-- sintered glass crucible mass in grams (g); m - the value of the sample mass, 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 0.002%. A.6 Determination of loss on drying A.6.1 Instruments and Equipment Weighing bottle. Φ50 mm × 30 mm. A.6.2 Analysis step Silica gel was dried with a dryer to a constant mass weighing bottle Weigh about 2 g samples, accurate to 0.000 2 g, tile in the sample Weighing the bottom of the bottle. The weighing bottle placed on silica gel drier, place 4 h after weighing. A.6.3 Calculation Results Loss on drying mass fraction w3 and its value is expressed in%, according to formula (A.3) Calculated. 013 × - = m mmw (A.3) Where. Numerical ago m-- dried sample mass, expressed in grams (g); Value after m1-- dried 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 0.03%. A.7 pH measurement A.7.1 Reagents and materials Carbon dioxide-free water. A.7.2 Instruments and Equipment pH meter. Indexing is 0.02. A.7.3 Analysis step Weigh 10.00 g ± 0.01 g sample was placed in 100 mL beaker, with no carbon dioxide dissolved in water and transferred to 100 mL volumetric flask, Diluted with water to the mark. Poured into 100 mL dry beaker, pH was measured by pH meter test solution. Take the arithmetic mean of the parallel determination results of the measurement results, the results of parallel determination of the absolute difference is not more than 0.2. A.8 Determination of heavy metals (Pb) of A.8.1 Reagents and materials A.8.1.1 hydrochloric acid solution. 1 + 1. A.8.1.2 ammonia solution. 2 + 3. A.8.1.3 sodium sulfide solution. Weigh 5 g of sodium sulfide, dissolved in 10 mL of water, add 30 mL of glycerol and mix well. The reagents used for 1 month. A.8.1.4 acetate buffer solution. pH = 3.5; Weigh 25 g of ammonium acetate were dissolved in 25 mL of water, add 45 mL 1 + 1 hydrochloric acid solution, adjusted to pH 3.5 with dilute hydrochloric acid or dilute aqueous ammonia (Test with a pH meter), diluted with water to 100 mL. A.8.1.5 Lead standard solution. 1mL solution containing lead (Pb) 0.01 mg; Pipette 1.00mL lead standard solution according to HG/T 3696.2 prepared, placed in 100 mL volumetric flask, dilute to the mark, shake. The solution that is ready to use with. A.8.1.6 phenolphthalein indicator solution. 10 g/L. A.8.2 Analysis step A tube. in 50 mL colorimetric tube, pipette 1.00mL lead standard solution, add water to 25 mL, spare. B and C tube pipe. each weighed 2.00 g ± 0.01 g sample was placed in a 150 mL beaker, add 20 mL of water and heated to dissolve the sample Solution to cool. Hydrochloric acid solution was added dropwise to a bubble (about 4.5 mL HCl solution) does not occur, heated to boiling, cooled transferred to a 50mL colorimetric Tube control solution volume of less than 35mL. With a pipette to the tube C was added 1.0 mL of lead standard solution, set aside. Three each colorimetric tube add 1 drop of phenolphthalein indicator solution, adjusting the pH of the solution is neutral (phenolphthalein with an aqueous ammonia solution and hydrochloric acid solution Just faded red), added 5 mL pH3.5 acetate buffer solution and mix. Add 2 drops of sodium sulfide solution, add water to 50 mL, and mix. In a dark place 5 min, observed on white background, B can not be deeper than the color tube A tube of color, C color tube color tube should be A A tube or fairly deep in the chromaticity. A.9 Determination of Arsenic Weigh 1.00 g ± 0.01 g sample was placed in a conical flask arsenic measuring device, add 25 mL of water to dissolve the sample. The solution of hydrochloric acid and To bubble solution (approximately 2.0 mL of hydrochloric acid) does not occur, then add 5mL hydrochloric acid, as the test solution. Limited have formulated standard solution. Pipette 3.00 mL of arsenic standard solution [1 mL solution of arsenic (As) 1.0 μg], the following according to GB/T 5009.76 Chapter 11 -2003 determination. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 25589-2010_English be delivered?Answer: Upon your order, we will start to translate GB 25589-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 25589-2010_English with my colleagues?Answer: Yes. 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