GB 14759-2010 English PDF

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GB 14759-2010: National food safety standards -- Food additives -- Taurine
Status: Valid

GB 14759: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 14759-2010	279	Add to Cart	3 days	National food safety standards -- Food additives -- Taurine	Valid
GB 14759-1993	239	Add to Cart	2 days	Food additive. Taurine	Obsolete

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Basic data

Standard ID: GB 14759-2010 (GB14759-2010)
Description (Translated English): National food safety standards -- Food additives -- Taurine
Sector / Industry: National Standard
Classification of Chinese Standard: X42
Classification of International Standard: 67.220.20
Word Count Estimation: 12,164
Date of Issue: 2010-12-21
Date of Implementation: 2011-02-21
Older Standard (superseded by this standard): GB 14759-1993
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 ethylene oxide or 2 aminoethanol as the starting material, the chemical synthesis of food additives taurine.

GB 14759-2010: National food safety standards -- Food additives -- Taurine

---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 - food additives - taurine 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 taurine

Foreword

This standard replaces GB 14759-1993 "food additive taurine." This standard compared with GB 14759-1993, the main changes are as follows. - Modify the range; - Sulfate ≤0.2% by the index revised to ≤0.02%; - Chloride ≤0.1% by the index revised to ≤0.02%; - Taurine ≥98.5% by the index revised to 98.5% - 101.5%; - Added index and conductivity measurement method; - Increasing the pH of indicators and measurement methods; - Added salt of indicators and measurement methods; - Modify the identification test; - Determination of taurine increased by potentiometric titration. The Standard Annexes A and B are normative appendix. This standard replaces the standards previously issued as follows. --GB 14759-1993. National Food Safety Standard Food additives taurine

1 Scope

This standard applies to ethylene oxide or 2-amino-ethanol as a starting material, the chemical synthesis of food additives taurine.

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 2-ethanesulfonic acid Formula 3.2 C2H7NO3S 3.3 formula 3.4 relative molecular mass 125.15 (according to 2007 international relative atomic mass) 4. Technical Requirements 4.1 Sensory requirements. comply with the requirements of Table 1. Table 1 Sensory requirements Project requires test methods Color white sample taken 10 mL, placed in a test tube, under natural light, Observe the color and texture, smell the smell. Odour odorless Organization state crystal or crystalline powder 4.2 Physical indicators. in accordance with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Taurine (C2H7NO3S, dry basis) w /% 98.5 ~ 101.5 Appendix A A.4 Conductivity (μs.cm-1) ≤ 150 Appendix A A.5 pH 4.1 ~ 5.6 in Appendix A A.6 Easy carbonized matter by testing in A.7 in Appendix A Residue on ignition w /% ≤ 0.1 Appendix A A.8 Loss on drying w /% ≤ 0.2 A.9 in Appendix A Arsenic (As)/(mg/kg) ≤ 2 Appendix A A.10 Clarity test by test A.11 in Appendix A Chloride (Cl- meter) w /% ≤ 0.02 Appendix A A.12 Sulfate (SO42- meter) w /% ≤ 0.02 Appendix A A.13 Ammonium (NH4 to count) w /% ≤ 0.02 Appendix A A.14 Heavy metals (Pb)/(mg/kg) ≤ 10 Appendix A A.15

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 This standard reagents and water, did not indicate when the other requirements, refer to analytically pure reagents and GB/T 6682-2008 stipulated three Grade water; test the standard titration solution and other required solution, when it is not specified, according to GB/T 601, GB/T 602, GB/T 603 Regulations formulated. A.3 Identification Test A.3.1 Reagents and materials A.3.1.1 developing solvent. water - ethanol - n-butanol - acetic acid (1501501001). A.3.1.2 chromogenic agent. acetone solution of ninhydrin. 20g/L. A.3.1.3 silica gel G plate. A.3.1.4 taurine reference. A.3.2 Analysis step A.3.2.1 TLC Take laboratory sample and reference substance, the amount of taurine were dissolved in water and dilution made about each 1mL solution containing 2mg, as The sample solution and reference solution. Draw the two solutions each 5μL, respectively banded spotted way point in the same silica gel G Plate, strip width 5mm, with the agent to start, spray reagent, heated at 105 ℃ for about 5min to spots, and immediately view. kind Solution of the main spots of color and position of the main spots of the reference solution. A.3.2.2 IR Using potassium bromide tablet method according to GB/T 6040 test, IR laboratory samples should control profile (see Appendix B taurine infrared absorption spectrum control diagram) consistent. A.4 Determination of taurine A.4.1 The first method (Arbitration Act) A.4.1.1 Reagents and materials A.4.1.1.1 formaldehyde. A.4.1.1.2 sodium hydroxide standard titration solution. c (NaOH) = 0.1 mol/L. A.4.1.2 analysis step Weigh about 0.2 g laboratory samples, accurate to 0.000 1 g, add water to dissolve 50 mL, 5 mL of formaldehyde was added with sodium hydroxide Titration standard solution titration, according to GB/T 9725 Chemicals potentiometric titration indicate the end, and blank test using the same method. A.4.2 Method II A.4.2.1 Reagents and materials A.4.2.1.1 formaldehyde solution. A.4.2.1.1 sodium hydroxide standard titration solution. c (NaOH) = 0.1 mol/L. A.4.2.1.2 phenolphthalein indicator. 5g/L ethanol solution. A.4.2.2 analysis step Weigh about 0.2 g laboratory samples, accurate to 0.000 1 g, add water to dissolve 50 mL, added 5 mL formaldehyde solution hydroxide Sodium standard titration solution titration, add 3 drops of phenolphthalein indicator until pink appears. And blank test using the same method. A.4.3 Calculation Results Taurine content (C2H7NO3S meter, dry basis) content to 1w its value is expressed in%, according to equation (A.1) Calculated. [()/1000] 100% (1 ) c VV Mw mw × - × = ×× - (A.1) Where. 0V - Numerical titration blank test solution of sodium hydroxide solution consumed by the volume, in milliliters (mL); 1V - Numerical laboratory sample titration solution of sodium hydroxide solution consumed by the volume, in milliliters (mL); c - accurate value of concentration of sodium hydroxide solution, in units of moles per liter (mol/L); m - Numerical laboratory sample mass, in grams (g); 2w - as measured by loss on drying laboratory sample mass fraction values; M - Numerical taurine molar mass in grams per mole (g/mol) [M (C2H7NO3S) = 125.15]. Take two parallel determination results of the arithmetic average of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.3%. A.5 Determination of conductivity Weigh 1.0 g ± 0.01g laboratory samples, add 20mL of purified water (conductivity of no more than 4μs.cm-1) was dissolved, according to GB/T 6908-2008 were determined. A.6 pH measurement of Weigh 1.0 g ± 0.01g laboratory samples, add freshly boiled and cooled water to dissolve 20mL, according to GB/T 9724 were measured. Determination A.7 easily charcoals A.7.1 Method summary The sample was dissolved in sulfuric acid solution, and compared with a sulfuric acid solution, not deeper color. A.7.2 Reagents and materials Sulfuric acid solution. 94.5% - 95.5% (mass fraction). A.7.3 Analysis step Take a consistent inner diameter of two colorimetric tube. A tube was added 5 mL sulfuric acid solution; after the tube was added 5 mL of acetic acid solution was slowly added 0.5 g ± 0.01g laboratory samples, and shake to dissolve and let stand for 15min before the B set with two white background, flat visual observation. B tube It was no better than in the armor tube deeper color. A.8 Determination of residue on ignition A.8.1 Reagents and materials sulfuric acid. A.8.2 Analysis step Weigh about 1.0 g laboratory samples, accurate to 0.000 2 g, is set to a constant weight has been burning crucible, slowly burn to completely carbonized, Cool to room temperature; add 0.5mL ~ 1 mL sulfuric moist, low-temperature heating to sulfuric acid vapor divisible after ignition at 550 ℃ ± 50 ℃ enable End Ashing the whole, moved to a desiccator, cooled to room temperature, after a specified precisely weighed, and then calcined to constant weight at 550 ℃ ± 50 ℃. A.8.3 Calculation Results The mass fraction of residue on ignition in 3w and its value is expressed in%, according to equation (A.2) Calculated. () 100% m mw - = × (A.2) Where. 3m - numerical constant weight of the crucible and residue mass in grams (g); 4m - numerical constant weight crucible mass in grams (g); m - mass of the laboratory sample values in grams (g). The arithmetic average of two parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.02% A.9 Determination of loss on drying According to GB/T 6284 Determination, weighed about 1.0 g laboratory samples, accurate to 0.000 2 g, at 105 ℃ ± 2 ℃ dried 3h. A.10 Determination of Arsenic Weigh 1.0g ± 0.01g laboratory sample, add 23 mL dissolved in water, add 5 mL of hydrochloric acid; amount of 2mL ± 0.01 mL of arsenic (per 1 mL Arsenic 1.0 μg) standard solution was prepared limits. Other carried out by GB/T 5009.76-2003 regulations. A.11 Determination of Clarity A.11.1 reagents and materials A.11.1.1 methenamine solution. 100g/L. A.11.1.2 turbidity standard stock solution. Weigh dried at 105 ℃ to constant weight of 1.00 g hydrazine sulfate, to the nearest 0.001 g, set 100 mL volumetric flask, add the amount of water soluble Solutions, if necessary, warmed in a water bath 40 ℃ dissolved, and diluted with water to the mark, shake, place 4h ~ 6h; of this solution with an equal capacity Amount of hexamine solution (100g/L) mixed, shaken at 25 ℃ in the dark standing 24h, that is, too. The liquid home cold place away from light, can Within two months of use, shake well before use. A.11.1.3 0.5 turbidity standard dope number. Take 15.0 mL turbidity standard stock solution, and placing 1000 mL volumetric flask, diluted with water to the mark, shake, check amount, set 1 cm Absorption cell, according to the UV - visible spectrophotometry (People's Republic of China Pharmacopoeia 2005 edition of Appendix IV A), at 550 nm Determination of the wavelength, the absorbance should be within the range of 0.12 to 0.15. The solution should be within 48h use Shake well before use. A.11.1.4 0.5 turbidity standard number. Take 2.5 mL stock solution turbidity standard, set in 100 mL volumetric flask, diluted with water to the mark, shake, that was. A.11.2 Analysis steps Press the People's Republic of China Pharmacopoeia 2005 edition of Appendix Ⅸ B clarity test method. Weigh 0.5 g ± 0.01g laboratory samples, Add water to dissolve 20 mL, compared with the same volume of water or number 0.5 turbidity standard solution, if significant turbidity, turbidity can not be more than the number 0.5 standard solution deep. Determination of chloride A.12 A.12.1 reagents and materials A.12.1.1 nitric acid solution. 105 → 1000. A.12.1.2 silver nitrate test solution. 0.1 mol/L. A.12.1.3 standard sodium chloride solution. Weigh 0.165g sodium chloride, accurate to 0.000 2 g, set 1000 mL volumetric flask, add water to dissolve and dilute to volume, shake Even as the stock solution. Before use, the precise amount of stock solution of 10 mL, 100 mL volumetric flask set, diluted with water to the mark, shake, that was (per 1 mL phase When in 10μg of Cl-). A.12.2 Analysis steps Weigh 1.0g ± 0.01 g laboratory sample set 50 mL Nessler colorimetric tube, dissolved in water, and dilute to volume; amount of 5 mL, plus Dissolved in water to make 25 mL, 10 mL plus nitric acid solution; if not clarified solution should be filtered; set 50 mL Nessler colorimetric tube, add water to make Of about 40 mL, shake, that laboratory sample solution. Another 2mL ± 0.01mL standard sodium chloride solution, and placing 50 mL Nessler colorimetric tube , Add 10 mL of nitric acid, add water to make 40 mL, shake, that was a control solution. Laboratory sample solution and control solution, respectively Was added 1.0 mL of silver nitrate solution, diluted with water to 50 mL, shake, in the dark place 5min, on a black background with the home, from the cuvette Under the direction of observation, comparison, that is, too. Comparative laboratory sample solution and control solution, not deeper. Determination of sulfate A.13 A.13.1 reagents and materials A.13.1.1 hydrochloric acid solution. 234 → 1000. A.13.1.2 barium chloride solution. 250g/L. A.13.1.3 standard potassium sulfate solution. Weigh 0.181 g of potassium sulfate, accurate to 0.000 2 g, set 1000 mL volumetric flask, add water Dissolve and dilute to the mark, shake, that was (the equivalent of 100 μg per 1mL of SO4). A.13.2 Analysis steps Weigh 0.5 g ± 0.01g laboratory samples, dissolved in water to make into about 40 mL; solution if not clarified, should be filtered; set 50 mL Nessler Colorimetric tube, add 2 mL of hydrochloric acid solution, shake, that laboratory sample solution. Another 1mL ± 0.007mL standard potassium sulfate solution, set 50 mL Nessler colorimetric tube, add water to make about 40 mL, add 2 mL of hydrochloric acid solution, shake, that was a control solution. Laboratory sample solution Control solution were added 5 mL of barium chloride solution, diluted with water to 50 mL, fully shake, place 10min, on a black background with the home, Observed from the direction of the cuvette, relatively, that is. If the color, the color of the sample solution compared to the control laboratory and display solution can not be Deeper. Determination of ammonium A.14 A.14.1 reagents and materials A.14.1.1 magnesia. A.14.1.2 potassium iodide. A.14.1.3 potassium hydroxide. A.14.1.4 mercuric chloride saturated solution. A.14.1.5 sodium hydroxide solution. 43g/L. A.14.1.6 dilute hydrochloric acid. 234 → 1000. A.14.1.7 dilute sulfuric acid. 57 → 1000. A.14.1.8 potassium permanganate test solution. 0.1 mol/L. A.14.1.9 ammonia-free distilled water. take 1000 mL of purified water, add 1 mL of dilute sulfuric acid and 1 mL of potassium permanganate solution, distillation. A.14.1.10 alkaline potassium mercuric iodide test solution. Weigh approximately 10 g of potassium iodide, to the nearest 0.01 g, after adding 10 mL of water was dissolved, it was slowly added a saturated solution of mercury dichloride, with the added with stirring Mix, to form a red precipitate was not dissolved, and 30 g of potassium hydroxide, accurate to 0.01 g, and dissolved, together with 1 mL 1 mL or more dichloro Mercury saturated solution and diluted with an appropriate amount of water into a 200 mL, allowed to stand to precipitate, that is, too, to take a clear solution upper layer applications when used. A.14.1.11 standard ammonium chloride solution. Weigh about 31.5 mg of ammonium chloride, accurate to 0.01 g, set 1000 mL volumetric flask, add water to dissolve and dilute to the mark, Shake, that was (equivalent per 1 mL 10 μg of 4NH). A.14.2 Analysis steps Weigh 0.1g ± 0.01g laboratory samples, set the distillation flask, add 200 mL of ammonia-free distilled water, add 1 g of magnesium oxide, heated to distill distilled Import a solution containing 1 drop of dilute hydrochloric acid and 5 mL of ammonia-free distilled water 50 mL Nessler colorimetric tube, as soon as the distillate of 40 mL, the distillation was stopped, Add 5 drops of sodium hydroxide solution, add ammonia-free distilled water to 50 mL, add 2 mL of alkaline potassium mercuric iodide test solution, shake, place 15min, such as significant Color, and 2mL ± 0.010mL standard ammonium chloride solution (equivalent to 10μg per 1mL 4NH ) Control fluid by the above method comparison No deeper. A.15 Determination of Heavy Metals A.15.1 reagents and materials A.15.1.1 nitrate. A.15.1.2 sulfuric acid. A.15.1.3 hydrochloric acid. A.15.1.4 glycerol. A.15.1.5 ammonium acetate. A.15.1.6 lead nitrate. A.15.1.7 thioacetamide. A.15.1.8 ammonia solution. 400 → 1000. A.15.1.9 sodium hydroxide solution. c (NaOH) = 1 mol/L. A.15.1.10 hydrochloric acid solution. c (HCl) = 2 mol/L. A.15.1.11 hydrochloric acid solution. c (HCl) = 7 mol/L. A.15.1.12 ammonia solution. c (NH3 · H2O) = 5 mol/L. A.15.1.13 phenolphthalein indicator solution. 10g/L ethanol solution. A.15.1.14 acetate buffer (pH3.5). Weigh about 25 g of ammonium acetate, accurate to 0.01 g, add 25 mL of water dissolved, add 7 mol/L hydrochloric acid solution, 38 mL, with 2 mol/L salt Acid solution or aqueous ammonia solution to accurately adjust the pH to 3.5 (pH meter), diluted to 100 mL, that is, too. A.15.1.15 thioacetamide test solution. It weighs about 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 Liquid, water bath heated on 20s, cooled and used immediately. A.15.1.16 lead standard solution. Weigh about 0.160 g of lead nitrate, accurate to 0.000 2g, placed in 1000 mL volumetric flask, 5 mL nitric acid and 50 mL of water, add dissolved, Diluted with water to the mark, shake, as the stock solution. Before use, Pipette 10mL ± 0.02mL stock solution into 100 mL volumetric flask, Diluted with water to the mark, shake, that was (per 1mL equivalent to 10 μg of Pb). Configuration and glassware used for storage shall lead. A.15.2 Analysis steps Press the People's Republic of China Pharmacopoeia 2005 edition Appendix Ⅷ H Method II test for heavy metals, as follows. Take the residue left under A.8 item, add 0.5 mL of nitric acid, evaporated to oxide vapor is divisible after (or take 1g laboratory sample, slowly To burning completely carbonized, cooled to room temperature, add 0.5mL ~ 1.0 mL sulfuric acid was just moist, heated to a low temperature with sulfuric acid divisible, add 0.5 mL of nitric acid, evaporated to steam after the nitrogen oxide divisible, cooled to room temperature, burning until completely ashed at 500 ℃ ~ 600 ℃), cooled to room Temperature, add 2 mL of hydrochloric acid, add 15 mL water was evaporated to dryness on a water bath, dropping ammonia solution to phenolphthalein instructions VIS neutral, plus 2 mL of acetic acid Salt buffer (pH3.5), after heat gently to dissolve, displacing A Nessler colorimetric tube, diluted with water to 25 mL; Another laboratory sample preparation Reagent solution, post porcelain dish evaporated, add 2 mL acetate buffer (pH3.5) and 15 mL of water, heat gently to dissolve, displacing Nessler B colorimetric tube, add 1mL ± 0.01mL lead standard solution, and then diluted with water to 25 mL; and then were added thioacetamide in the two B Each test solution 2 mL, shake, place 2min, on the same set of paper, from the top down perspective, color and acetic Tube Comparison A tube display, shall not Deeper.

Appendix B

(Normative) Taurine infrared absorption spectrum of the control diagram Note. Quoted from "Drug IR set," Volume I (1995) Figure B.1 taurine infrared absorption spectrum of the control diagram ......

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