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GB 14754-2010 English PDF

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GB 14754-2010: National food safety standards -- Food additives -- Vitamin C (ascorbic acid)
Status: Valid

GB 14754: Evolution and historical versions

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GB 14754-2010English229 Add to Cart 3 days [Need to translate] National food safety standards -- Food additives -- Vitamin C (ascorbic acid) Valid GB 14754-2010
GB 14754-1993English239 Add to Cart 2 days [Need to translate] Food additive. Vitamin C (Ascorbic acid) Obsolete GB 14754-1993

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Basic data

Standard ID GB 14754-2010 (GB14754-2010)
Description (Translated English) National food safety standards -- Food additives -- Vitamin C (ascorbic acid)
Sector / Industry National Standard
Classification of Chinese Standard X42
Classification of International Standard 67.220.20
Word Count Estimation 10,126
Date of Issue 2010-12-21
Date of Implementation 2011-02-21
Older Standard (superseded by this standard) GB 14754-1993
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 D-glucose or sorbitol as the starting material after fermentation chemical synthesis system for food additives, vitamins C.

GB 14754-2010: National food safety standards -- Food additives -- Vitamin C (ascorbic acid)

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National food safety standards - food additives - vitamin C (ascorbic acid) National Standards of People's Republic of China People's Republic of China Ministry of Health issued Issued on. 2010-12-21 2011-02-21 implementation National Food Safety Standard Food additives Vitamin C (ascorbic acid)

Foreword

This standard replaces GB 14754-1993 "Food additive vitamin C (ascorbic acid)." This standard compared with GB 14754-1993, the main changes are as follows. - Cancel the methylene blue solution Identification Test; - Added Infrared Spectroscopy; - Determine the concentration of vitamin C content of iodine standard solution titration by 0.1 mol/L changed to 0.05 mol/L; - Increase the lead indicators and test methods; - Increased iron index and test methods; - Increased Copper indicators and test methods. The Standard Annexes A and B are normative appendix. This standard replaces the standards previously issued as follows. --GB 14754-1993. National Food Safety Standard Food additives Vitamin C (ascorbic acid)

1 Scope

This standard applies to D- glucose or sorbitol as the starting material after fermentation chemical synthesis prepared food additive vitamin C.

2 Normative references

The standard file referenced in the application of this standard is essential. For cited documents with dates, only the date of Version applies to this standard. For undated references, the latest edition (including any amendments) applies to this standard. 3 chemical name, molecular formula, molecular mass and structural formula 3.1 Chemical Name L-2,3,5,6- four-hydroxy-2-hexenoic acid lactone -γ- Formula 3.2 C6H8O6 3.3 formula 3.4 relative molecular mass 176.12 (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 White or slightly yellow color proper amount of sample is placed in 50mL beaker, in natural light Observed the color and texture, smell the smell. Odour odorless Organization state crystal or crystalline powder 4.2 Physical indicators. to comply with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Vitamin C (C6H8O6), w /% ≥ 99.0 Appendix A A.4 Specific rotation αm (20 ℃, D)/[(º) · dm2 · kg-1] 20.5 to 21.5 A.5 in Appendix A Residue on ignition, w /% ≤ 0.1 A.6 in Appendix A Arsenic (As)/(mg/kg) ≤ 3 Appendix A A.7 Heavy metals (Pb)/(mg/kg) ≤ 10 Appendix A A.8 Lead (Pb)/(mg/kg) ≤ 2 GB 5009.12 Iron (Fe)/(mg/kg) ≤ 2 GB/T 15337 Copper (Cu)/(mg/kg) ≤ 5 GB/T 15337

Appendix A

(Normative) Testing method A.1 Safety Tips Reagents The standard test methods used for toxic or corrosive, according to the relevant provisions of the operation, the operation need to be careful. If splashed on the skin should immediately wash with water, severe cases should be treated immediately. When using a volatile acid, to be carried out in a fume hood. A.2 General Provisions The reagents used in this standard, unless otherwise noted, only in the analysis confirmed analytically pure reagents and GB/T 6682-2008 in Regulation Given three water. Standard Test Method for titration solution required impurity standard solution, preparations and products, did not indicate when the other requirements, according to GB/T 601, GB/T 602, GB/T 603 provisions of the preparation. A.3 Identification A.3.1 Reagents and materials A.3.1.1 activated carbon. A.3.1.2 pyrrole. A.3.1.3 silver nitrate solution. 17.5 g/L. A.3.1.4 trichloroacetic acid solution. 50 g/L. A.3.2 Identification Test A.3.2.1 silver nitrate reaction test A.3.2.1.1 principle of the method Vitamin C molecule diene alcohol groups, with a strong reduction, can be oxidized to dehydro ascorbic acid silver nitrate while producing black silver precipitation. A.3.2.1.2 analysis step Weigh about 0.1 g laboratory samples, accurate to 0.01 g, was dissolved in 5 mL of water, add 0.5 mL of silver nitrate solution, which generates silver black precipitation. A.3.2.2 carbohydrate nature of the reaction test A.3.2.2.1 principle of the method Vitamin C has a carbohydrate nature of the reaction, in the presence of trichloroacetic acid or hydrochloric acid hydrolysis, decarboxylation, generate pentose, then dehydration, Uronic into, pyrrole was added, heated to 50 ℃ i.e. blue occur. A.3.2.2.2 analysis step Weigh about 0.015 g laboratory samples were dissolved in 15 mL trichloroacetic acid solution, add 200 mg of activated carbon, violently shaking 1min, repeatedly Filtering to clarify, add 1 mL pyrrole in 5 mL filtrate, after shaking to dissolve, that is heated to 50 ℃ blue occur. A.3.2.2.3 infrared absorption spectrum identification Using potassium bromide tablet method according to GB/T 6040 test, IR spectra laboratory samples should be consistent (for the control of According to Atlas, see Appendix B). A.4 Determination of Vitamin C A.4.1 Method summary Vitamin C has a strong reduction, can be quantitatively oxidized iodine. Starch as indicator, with standard iodine titration droplet given sample water Solution, based on the amount of iodine standard solution titration, calculated in terms of vitamin C content of C6H8O6. A.4.2 Reagents and materials A.4.2.1 sulfuric acid solution. 57 → 1000. A.4.2.2 standard iodine titration solution. c (I2) = 0.05 mol/L. A.4.2.3 starch indicator solution. 10 g/L. A.4.3 Analysis step Weigh about 0.2 g laboratory samples, accurate to 0.000 2 g, placed in 250 mL iodine flask, add 20 mL of carbon dioxide-free 25 mL of water and sulfuric acid solution to dissolve immediately with standard iodine titration solution titration, near the end, add 1 mL of starch indicator solution, to drop The solution was blue, holding 30s does not fade as the end point. Meanwhile blank test, but without addition of the sample, the other steps are determined in the same sample. A.4.4 Calculation Results Vitamin C (in C6H8O6 meter) mass fraction w1, expressed in%, according to equation (A.1) Calculated. () 100% VV c Mw - × × = ×× (A.1) Where. V - Numerical laboratory sample consumption standard iodine titration solution volume in milliliters (mL); V0-- blank test standard iodine value titration solution consumption volume in milliliters (mL); c - accurate iodine standard titration solution concentration value in units of moles per liter (mol/L); M - molar mass values of Vitamin C in units of grams per mole (g/mol) (M = 176.12); Numerical m-- laboratory 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 0.3%. A.5 Determination of specific rotation A.5.1 Analysis step Weigh about 5 g laboratory samples, accurate to 0.000 2 g, placed in 50 mL volumetric flask, dissolved in water and diluted to the mark, shake uniform. Other methods according to GB/T 613-2007 provisions were. A.5.2 Calculation Results Specific rotation аm (20 ℃, D) according to equation (A.2) Calculated. (A.2) Where. () αρ αα DCm = °, 20 α - measured angle of rotation, in degrees (°); l - the length of the optical tube unit decimeter (dm); αρ - mass concentration in the solution effective component in grams per milliliter (g/mL). A.6 Determination of residue on ignition A.6.1 Reagents and materials sulfuric acid. A.6.2 Analysis step Weigh approximately 1 g laboratory samples, accurate to 0.000 2 g, is placed in a burned 700 ℃ ~ 800 ℃ to constant weight of the crucible, first Small fire gradually heated to complete carbonization, cooled to room temperature, add 0.5 mL ~ 1 mL of sulfuric acid was wetted, low temperature heating steam in addition to sulfuric acid Do shifted after high-temperature furnace, burning to constant weight at 700 ℃ ~ 800 ℃ in. A.6.3 Calculation Results Burning residue mass fraction w2, expressed in%, according to equation (A.3) Calculation 2 100% m mw - = × (A.3) Where. 1m - Numerical residue and empty crucible mass in grams (g); 2m - Numerical empty crucible mass in grams (g); m - Numerical laboratory 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 0.02%. A.7 Determination of Arsenic Weigh 1.0 g ± 0.01 g laboratory samples, add 10 mL of water was dissolved as a sample solution; amount of 3 mL ± 0.025 mL (arsenic 3.0μg) Arsenic (As) standard solution preparation limits. Other conducted in accordance with GB/T 5009.76-2003 Gutzeit method. A.8 Determination of Heavy Metals A.8.1 Reagents and materials A.8.1.1 nitrate. A.8.1.2 glycerol. A.8.1.3 ammonium acetate. A.8.1.4 lead nitrate. A.8.1.5 thioacetamide. A.8.1.6 hydrochloric acid solution. c (HCl) = 2 mol/L. A.8.1.7 ammonia solution. c (NH3 · H2O) = 5 mol/L. A.8.1.8 sodium hydroxide solution. c (NaOH) = 1 mol/L. A.8.1.9 hydrochloric acid solution. c (HCl) = 7 mol/L A.8.1.10 acetate buffer (pH3.5). Weigh 25 g of ammonium acetate, accurate to 0.01 g, add dissolved in water, add 38 mL 7 mol L hydrochloric acid solution, 25 mL /, with 2 mol/L Or a hydrochloric acid solution 5 mol/L aqueous ammonia solution, the pH adjusted to accurately 3.5 of 5 (pH meter), diluted with water to 100 mL. A.8.1.11 lead standard solution. Weigh 0.160 g of lead nitrate, accurate to 0.000 2g, placed in 1000 mL volumetric flask, add 5 mL and 50 mL of nitric acid dissolved in water, Diluted with water to the mark, shake, as the stock solution. Before use, pipette 10 mL ± 0.02 mL stock solution into 100 mL volumetric flask Diluted, add water to the mark, shake, that was (per 1 mL equivalent to 10 μg of Pb). Configuration and glassware used for storage shall contain lead. A.8.1.12 thioacetamide test solution. Weigh 4 g thioacetamide, to the nearest 0.01 g, add water to dissolve into a 100 mL, home refrigerator. Take 5.0 mL prior to use Mixture (by a 1 mol/L 15 mL of sodium hydroxide solution, 5.0 mL of water and 20 mL glycerol), plus the aforementioned 1.0 mL of thioacetamide Solution on a water bath heated 20s, cooling, use immediately. A.8.2 Analysis step Press the "People's Republic of China Pharmacopoeia" 2005 edition Appendix Ⅷ H method first heavy metal inspection method. Specific methods, such as under. Take 25 mL Nessler colorimetric tube two, A tube was added 1 mL ± 0.01 mL (lead 10.0μg) Lead (Pb) standard solution and 2 mL After acetate buffer, diluted with water to 25 mL; the other weighed 1 g ± 0.01 g laboratory samples, placed Nessler colorimetric tube acetate tube, add 15 mL of water is dissolved, add 2 mL acetate buffer (pH 3.5), diluted with water to 25 mL, the solution was colored when, in tube A Dropping a small amount of a dilute solution or other interference-free caramel colored solution, so as to be consistent with acetic Tube; thioacetate were added again in the two B Amide test solution each 2 mL, shake, place 2min, on the same set of paper, from the top down perspective, showing the color tube B compared with A tube, No deeper.

Appendix B

(Normative) Vitamin C IR Note. Quoted from "Drug IR set," Volume I (1995) Figure B.1 vitamin C IR spectrum

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