GB 29206-2012 English PDFUS$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 29206-2012: Food additives ammonium sulfate Status: Valid
Basic dataStandard ID: GB 29206-2012 (GB29206-2012)Description (Translated English): Food additives ammonium sulfate Sector / Industry: National Standard Classification of Chinese Standard: X40 Classification of International Standard: 67.220.20 Word Count Estimation: 7,799 Regulation (derived from): Ministry of Health Bulletin 2012 No. 23 Issuing agency(ies): Ministry of Health of the People's Republic of China Summary: This Chinese standard applies to sulfuric acid and ammonium bicarbonate or ammonia as raw material and the reaction of the food additive ammonium sulfate. GB 29206-2012: Food additives ammonium sulfate---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 additives National Standards of People's Republic of China National standards for food safety Food Additives Ammonium Sulfate 2012-12-25 release 2013-01-25 Implementation Issued by the Ministry of Health of the People's Republic of China National standards for food safety Food Additives Ammonium Sulfate 1 ScopeThis standard applies to sulfuric acid and ammonium bicarbonate or ammonia as raw materials through the neutralization of the food additive made of ammonium sulfate. 2 Chemical name, molecular formula and relative molecular mass 2.1 Chemical name Ammonium sulfate 2.2 Molecular formula (NH4) 2SO4 2.3 Relative molecular mass 132.14 (according to the.2007 international relative atomic mass)3 technical requirements3.1 sensory requirements Shall comply with the provisions of Table 1. Table 1 sensory requirements The project requires a test method Colorless or white color State crystals or small particles Take appropriate sample in a 50 mL beaker and observe the color and state under natural light 3.2 Physical and chemical indicators Shall comply with the provisions of Table 2. Table 2 Physical and chemical indicators Item Index Test Method Ammonium sulfate [(NH4) 2SO4] content, w /% 99.0 ~ 100.5 Appendix A A.4 Residue on ignition, w /% ≤ 0.25 Appendix A A.5 Selenium (Se)/(mg/kg) ≤ 30 Appendix A A.6 Table 2 (continued) Item Index Test Method Lead (Pb)/(mg/kg) ≤ 3 Appendix A A.7 Arsenic (As)/(mg/kg) ≤ 3 GB/T 5009.76Appendix ATesting method A.1 Warning Some of the reagents used in the test methods of this standard are toxic or corrosive and should be operated with appropriate safety and protective measures. A.2 General provisions The reagents and water used in this standard, when not specified, refer to the analytical reagent and the tertiary water specified in GB/T 6682-2008. Standard titration solution used in the test, the standard solution for the determination of impurities, preparations and products, in the absence of other requirements, according to GB/T 601, GB/T 602, GB/T 603. The solution used refers to an aqueous solution when it is not specified with any solvent formulation. A.3 Identification test A.3.1 Reagents and materials A.3.1.1 barium chloride solution. 100 g/L. A.3.1.2 Hydrochloric acid solution. 1 1. A.3.1.3 Lead acetate solution. 80 g/L. A.3.1.4 Ammonium acetate solution. 100 g/L. A.3.1.5 Sodium hydroxide solution. 40 g/L. A.3.1.6 barium chloride solution. 100 g/L. A.3.2 Identification method A.3.2.1 Ammonium ion identification In the sample by adding sodium hydroxide solution, the release of ammonia, can make wet litmus test paper blue. Heating can promote sample decomposition. A.3.2.2 Sulfate ion identification A.3.2.2.1 Take about 1g sample, dissolve in 20mL water, add barium chloride solution, which produces a white precipitate, this white precipitate is insoluble in hydrochloric acid Solution. A.3.2.2.2 Take about 1g sample, dissolve in 20mL water, add lead acetate solution, which produces white precipitate, this white precipitate dissolved in ammonium acetate Solution. A.3.2.2.3 Take about 1g sample, dissolve in 20mL water, add hydrochloric acid solution does not produce precipitation. Determination of Ammonium Sulfate [(NH4) 2SO4] Content A.4.1 Methodological Summary In the neutral solution, ammonium salt and formaldehyde to produce the equivalent of ammonium salt content of acid, phenolphthalein as an indicator, with sodium hydroxide standard titration Solution titration. A.4.2 Reagents and materials A.4.2.1 Formaldehyde solution. 1 1..200mL formaldehyde was added to.200mL water, mixed, adding 2 drops of phenolphthalein indicator solution, dropping hydrogen and oxygen Sodium chloride solution (1mol/L) to the solution was slightly pink. A.4.2.2 sodium hydroxide standard titration solution. c (NaOH) = 1mol/L. A.4.2.3 phenolphthalein indicator solution. 10g/L. A.4.3 Analysis steps Weigh about 2g sample, accurate to 0.0002g, placed in 250mL Erlenmeyer flask, add 100mL water dissolved sample, add 40mL Formaldehyde solution, mix, place 30min, add 2 drops of phenolphthalein indicator solution, titration with sodium hydroxide titration solution to pink, and keep 5min does not fade. At the same time to do a blank test, in addition to no sample, the other addition of the reagent and the sample solution is exactly the same, and the same sample deal with. A.4.4 Calculation of results The mass fraction w1 of ammonium sulfate [(NH4) 2SO4] is calculated according to formula (A.1) w1 = c (V-V0) M/1000 m x 100% (A.1) Where. c - the exact value of sodium hydroxide standard titration solution concentration in moles per liter (mol/L); V --- titration sample solution consumed by sodium hydroxide standard titration solution volume value in milliliters (mL); V0 --- titration blank sample solution consumption of sodium hydroxide standard titration solution volume value in milliliters (mL); m - the mass of the sample, in grams (g); M = ammonium sulfate [1/2 (NH4) 2SO4] molar mass in grams per mole (g/mol) (M = 66.07); 1000 --- conversion factor. The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions The value is not greater than 0.3%. A.5 Determination of burning residue A.5.1 Reagents and materials Sulfuric acid solution. 1 33. A.5.2 Instruments and equipment A.5.2.1 porcelain crucible. 50mL. A.5.2.2 High temperature furnace. temperature can be controlled at 800 ℃ ± 25 ℃. A.5.3 Analysis steps Weigh about 1g of sample, accurate to 0.0002g. Placed in advance at 800 ℃ ± 25 ℃ burning to the quality of the porcelain crucible, dropping Sulfuric acid solution so that the sample wet, slowly heated in the electric furnace until all the samples volatilize, cooling. Add 0.1mL sulfuric acid solution to wet the residue, Continue to heat up to sulfuric acid. Placed in 800 ℃ ± 25 ℃ high temperature furnace burning to a constant quality. A.5.4 Calculation of results The mass fraction w2 of the burning residue content is calculated according to the formula (A.2) w2 = m1-m2 m x 100% (A.2) Where. m1 - the mass of the porcelain crucible and the residue in grams (g); m2 --- the quality of the porcelain crucible, in grams (g); m - the mass of the sample, in grams (g). The experimental results are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions The value is not greater than 0.03%. A.6 Determination of selenium (Se) A.6.1 Reagents and materials A.6.1.1 Cyclohexane. A.6.1.2 Hydroxylamine hydrochloride. A.6.1.3 Hydrochloric acid solution. 1 2. A.6.1.4 Ammonia solution. 1 2. A.6.1.5 Selenium (Se) Standard solution. 0.001 mg/mL. A.6.1.6 2,3-Diaminonaphthalene solution. Weigh 0.100 g of 2,3-diaminonaphthalene and 0.500 g of hydroxylamine hydrochloride were dissolved in 100 mL of 0.1 mol/L Hydrochloric acid solution. A.6.1.7 Precision pH test paper. 0.5 ~ 5.0. A.6.2 Instruments and equipment A.6.2.1 Separating funnel. 125 mL. A.6.2.2 Spectrophotometer. A cuvette with a 1 cm optical path. A.6.3 Analysis steps A.6.3.1 Preparation of sample solution Weigh 0.20g ± 0.01g sample, placed in 150mL beaker, add 25mL hydrochloric acid solution to dissolve the sample. Rhithers. Refunds.itheromeniation, and ... Results, The pH of the solution was adjusted to 1.8 to 2.2 (checked with a precision pH test paper), diluted with water to about 60 mL, and transferred to In a separatory funnel, add 10 mL of water in a beaker, 0.2 g of hydroxylamine hydrochloride, stir to dissolve and transfer to a separatory funnel. Immediately add 5.0mL 2,3-diaminonaphthalene solution. Plug the plug, shake, at room temperature for 100min. Add 5.0mL cyclohexane, shake vigorously for 2min, static minutes Layer, discard the water phase, keep the extract. A.6.3.2 Preparation of standard solutions Transfer the 6 mL selenium standard solution with a pipette, place in a 150 mL beaker, and add 25 mL of hydrochloric acid solution. The following operation is the same as A.6.3.1 In the "add 5mL ammonia solution to retain the extract". A.6.3.3 Determination The absorbance of the extract was measured at 380 nm using a 1 cm cuvette. The absorbance of the sample solution should not be greater than the standard solution Light value. A.7 Determination of lead (Pb) A.7.1 Reagents and materials A.7.1.1 Hydrochloric acid. A.7.1.2 Nitric acid. A.7.1.3 Trichloromethane. A.7.1.4 Sodium hydroxide solution. 250 g/L. A.7.1.5 Ammonium pyrrolidine dithiocarbamate (APDC) solution. 20 g/L. Filter before use. A.7.1.6 Lead (Pb) standard solution. 0.005 mg/mL. A.7.1.7 Precision pH test paper. 0.5 ~ 5.0. A.7.1.8 Water. in line with GB/T 6682-2008 in the provisions of secondary water. A.7.2 Instruments and equipment A.7.2.1 Dispensing funnel. 250 mL. A.7.2.2 Atomic Absorption Spectrophotometer (with lead hollow cathode lamp). A.7.3 Analysis steps A.7.3.1 Cleaning of glass instruments Glass equipment used. all nitric acid solution (1 2) soak overnight, rinse with tap water, and finally rinse with water. A.7.3.2 Preparation of sample solution Weigh 5.00g ± 0.01g sample, placed in 150mL beaker, add 30mL of water dissolved, add 1mL hydrochloric acid. Heated to boil a few times Min, cooled to 100 mL, and the pH of the solution was adjusted to 1.0 to 1.5 with sodium hydroxide solution. The solution was transferred to 250 mL of the solution In a funnel, diluted with water to about.200 mL. Add 2 mL of ammonium pyrrolidine dithiocarbamate (APDC) solution and mix. Respectively, with 20mL Trichloromethane was extracted twice, the chloroform layer was collected in a 50 mL beaker and the steam bath was evaporated to dryness (this operation must be carried out in a fume hood) To the residue, add 3 mL of nitric acid and continue to evaporate to near dryness. Add 0.5 mL of nitric acid and 10 mL of water and heat to a solution volume For 3mL to 5mL. Transfer to 10mL volumetric flask, dilute to the mark with water, shake. A.7.3.3 Preparation of standard solutions Remove the 3.00 mL lead standard solution in a 150 mL beaker and add 30 mL of water. The following procedure was followed by the same procedure as in "A.7.3.2" Acid transfer to 10mL volumetric flask, diluted with water to the mark, shake ". A.7.3.4 Determination Using air - acetylene flame, at 283.3nm wavelength, the water zero, measured absorbance, the sample solution absorbance should not be higher than the standard solution Liquid absorbance value. 2102- ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 29206-2012_English be delivered?Answer: Upon your order, we will start to translate GB 29206-2012_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 29206-2012_English with my colleagues?Answer: Yes. The purchased PDF of GB 29206-2012_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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