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GB 29950-2013 English PDF

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GB 29950-2013: Food additive -- Glycerin
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB 29950-2013	English	229	Add to Cart	3 days [Need to translate]	Food additive -- Glycerin	Valid	GB 29950-2013

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Basic data

Standard ID	GB 29950-2013 (GB29950-2013)
Description (Translated English)	Food additive -- Glycerin
Sector / Industry	National Standard
Classification of Chinese Standard	C54
Classification of International Standard	67.020
Word Count Estimation	10,197
Regulation (derived from)	China Food & Drug Administration [2013] No. 234, November, 1, 2013
Issuing agency(ies)	National Health and Family Planning Commission of the People's Republic of China
Summary	This standard applies to food additives: glycerol.

GB 29950-2013: Food additive -- Glycerin

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Food additive-Glycerin National Standards of People's Republic of China National Food Safety Standard Food additive glycerol Issued on. 2013-11-29 2014-06-01 implementation People's Republic of China National Health and Family Planning Commission released National Food Safety Standard Food additive glycerol

1 Scope

This standard applies to food additive glycerol. 2 chemical name, molecular formula, molecular mass and structural formula 2.1 Chemical Name Glycerol. Formula 2.2 C3H8O3 2.3 formula CH2 OH CH OH CH2 OH 2.4 relative molecular mass 92.09 (according to 2007 international relative atomic mass).

3 Technical requirements

3.1 Sensory requirements Sensory requirements shall comply with the requirements of Table 1. Table 1 Sensory requirements Project requires test methods Colorless to pale yellow color Transparent viscous liquid state Take the right amount of sample is placed in a colorimetric tube, in natural light Observe the color and line state 3.2 Physical and Chemical Indicators Physical and chemical indicators should be consistent with the provisions of Table 2. Table 2. Physical and chemical indicators Item Index Test Method Glycerol content (w) /% 95.0 ~ 100.5 GB/T 13216 The relative density (25 ℃/25 ℃) ≥ 1.249 GB/T 5009.2 Color by test A.3 in Appendix A Fatty acids and esters by experiment A.4 Chloride (based on Cl, w) /% ≤ 0.003 A.5 Easy carbide by test A.6 Residue on ignition (w) /% ≤ 0.01 GB/T 13216 Lead (Pb)/(mg/kg) ≤ 1 GB 5009.12

Appendix A

Testing method A.1 General Provisions Unless otherwise specified in this standard, the use of analytical reagent purity should be more than the standard titration solution, standard solution for measuring impurities, Preparations and products, should be GB/T 601, GB/T 602, the provisions of GB/T 603 preparation, test water should be consistent with GB/T 6682-2008 in Three water regulations. Solution was used in the tests did not indicate what is formulated with solvent, it refers to an aqueous solution. A.2 Identification Test Adding 2 to 3 drops of potassium bisulfate 0.5g sample was heated with acrolein-like odor. A.3 Determination of color A.3.1 Reagents and materials A.3.1.1 hexahydrate ferric chloride (FeCl3 · 6H2O). A.3.1.2 hydrochloric acid. A.3.1.3 potassium iodide. A.3.1.4 hydrochloric acid solution. 139. A.3.1.5 sodium thiosulfate standard titration solution. c (Na2S2O3) = 0.1mol/L. A.3.1.6 starch indicator solution. 10g/L. A.3.2 Instruments and Equipment A.3.2.1 Nessler colorimetric tube. 50mL. A.3.2.2 colorimetric tube frame. usually colorimetric tube pallet is white, it is best to install fluorescent lighting, improve observe the color effect. A.3.3 Analysis step A.3.3.1 Preparation of colorimetric ferric chloride stock solution Weigh 55.0g ferric chloride hexahydrate, dissolved in hydrochloric acid solution to prepare a solution of 1000mL. The draw solution 10mL, placed A 250mL iodine bottle, add water 15mL, 5mL hydrochloric acid and 3g of potassium iodide, still shaking after 15min. Join 100mL Diluted with water, add starch indicator solution, titration with sodium thiosulfate standard titration of free iodine. At the same time carry out a blank test, carried out the necessary repair positive. Sodium thiosulfate standard titration solution 0.1mol/L per milliliter is equivalent to 27.03mg consumption of ferric chloride hexahydrate. by Hydrochloric acid solution was added to adjust the final volume of the solution, so 45.0mg per ml of solution containing ferric chloride hexahydrate, ferric chloride colorimetric give Stock solution. A.3.3.2 standard colorimetric ferric chloride solution prepared Pipette 0.4mL colorimetric stock solution of ferric chloride, placed Nessler colorimetric tube, diluted with water to 50mL, per milliliter of solution contains 0.36mg Ferric chloride hexahydrate. A.3.3.3 Determination The sample was injected into the 50mL Nessler colorimetric tube to the mark, and ferric chloride standard colorimetric cuvette was placed along the shelves. Each tube A set of black paper tube, to avoid affecting the side of light. Comparative sample and standard colorimetric ferric chloride solution color. Than facing a white background color, from Observations on down. A.3.4 results found Sample color is not darker than the color than the color of a standard solution of ferric chloride, namely through tests. A.4 Determination of fatty acids and esters A.4.1 Reagents and materials A.4.1.1 sodium hydroxide solution. 0.5mol/L. A.4.1.2 hydrochloric acid standard titration solution. c (HCl) = 0.5mol/L. A.4.1.3 phenolphthalein indicator solution. 10g/L. A.4.2 Instruments and Equipment A.4.2.1 round bottom flask. 250mL. A.4.2.2 reflux condenser. A.4.3 Analysis step Pipette 40.0mL sample, placed in a round bottom flask was added 50mL freshly boiled water and 5.0mL of sodium hydroxide solution. The mixture containing Flask with reflux condenser connected to a mixed solution, heated to boiling, boiled for 5min, after cooling, a few drops of phenolphthalein indicator solution was added, immediately labeled with hydrochloric acid Quasi titration titration solution, titration until the solution is the titration end red just disappears. A.4.4 results found Hydrochloric acid standard titration solution volume consumed more than 4mL, namely through tests. A.5 chloride (Cl) Determination A.5.1 Reagents and materials A.5.1.1 morpholine. A.5.1.2 nitrate. A.5.1.3 hydrochloric acid solution. 0.01mol/L. A.5.1.4 silver nitrate solution. 0.1mol/L. A.5.2 Instruments and Equipment A.5.2.1 Nessler colorimetric tube. 50mL. A.5.2.2 round bottom flask. 100mL. A.5.2.3 reflux condenser. A.5.3 Analysis step A.5.3.1 Preparation of sample solution Weigh 5.0g sample was placed in a round bottom flask 15mL morpholine. The flask containing the mixture and reflux condenser connected to temperature And reflux 3h. After cooling, the condenser was washed with 10mL water, washing liquid access flask and carefully acidified with nitric acid solution in the flask. will The solution was transferred to a Nessler colorimetric tube, add 0.5mL silver nitrate solution, dilute with water to 50mL and mix. A.5.3.2 Preparation of control solution With 0.40mL of hydrochloric acid solution instead of the sample, without heating and reflux, additional step of preparing the same sample solution (A.5.3.1). A.5.3.3 Determination Turbidity comparison sample solution and control solution. Turbidity of the sample solution must not exceed the turbidity of the control solution, the equivalent of chloride (Cl) Content must not exceed 0.003%. A.6 Determination of carbon compounds Yi A.6.1 Reagents and materials A.6.1.1 cobalt chloride hexahydrate (CoCl2 · 6H2O). A.6.1.2 hexahydrate ferric chloride (FeCl3 · 6H2O). A.6.1.3 potassium iodide. A.6.1.4 hydrochloric acid. A.6.1.5 sulfuric acid. A.6.1.6 hydrochloric acid solution. 25975. A.6.1.7 hydrogen peroxide solution. mass fraction of 3%. A.6.1.8 sodium hydroxide solution.200g/L. A.6.1.9 sulfuric acid solution. 14. A.6.1.10 sodium thiosulfate standard titration solution. c (Na2S2O3) = 0.1mol/L. A.6.1.11 starch indicator solution. 10g/L. A.6.2 Instruments and Equipment With a stopper colorimetric tube. 25mL, sulfuric acid cleaned before use. A.6.3 Analysis step A.6.3.1 Preparation of cobalt chloride colorimetric stock solution Weigh 65.0g of cobalt chloride hexahydrate, dissolved in hydrochloric acid solution to prepare a solution of 1000mL. The draw solution 5mL, placed in a A 250mL flask iodine, hydrogen peroxide solution was added 5mL and 15mL of sodium hydroxide solution, boiled for 10min, cooled, added 2g 20mL solution of sulfuric acid and potassium iodide. Once precipitate is dissolved, the solution titrated with sodium thiosulfate standard titration of free iodine. This titrated Cheng is very sensitive to air oxidation, carbon dioxide protection applications. Sodium thiosulfate standard per milliliter 0.1mol/L consumption of titration solution It was equivalent to 23.79mg of cobalt chloride hexahydrate. By the addition of hydrochloric acid solution to adjust the final volume of the solution, containing per ml of solution 59.5mg cobalt chloride hexahydrate, cobalt chloride to give a stock solution colorimeter. A.6.3.2 Preparation of colorimetric ferric chloride stock solution Weigh 55.0g ferric chloride hexahydrate, dissolved in hydrochloric acid solution to prepare a solution of 1000mL. The draw solution 10mL, set In a 250mL iodine bottle, add water 15mL, 5mL hydrochloric acid and 3g of potassium iodide, still shaken after 15min. Join 100 mL diluted with water, add starch indicator solution, titration with sodium thiosulfate standard titration of free iodine. Blank test at the same time, the necessary Amendments. Sodium thiosulfate standard titration solution 0.1mol/L per milliliter is equivalent to 27.03mg consumption of ferric chloride hexahydrate. By the addition of hydrochloric acid solution to adjust the final volume of the solution, containing 45.0mg per ml of solution of ferric chloride hexahydrate to give trichloride Iron colorimetric stock solution. A.6.3.3 Preparation of standard colorimetric solution Pipette 0.4mL respectively cobalt chloride colorimetric stock solution, 3.0mL ferric chloride colorimetric stock solution and 6.6mL of water, placed in a stoppered same ratio Colorimetric tube, and mix well. A.6.3.4 Preparation of sample solution Pipette respectively 5mL samples and 5mL of sulfuric acid, the same place in another branch colorimetric tube with a stopper, control the temperature 18 ℃ ~ 20 ℃, gently mixed 1min, standing 1h. A.6.3.5 Determination On white background, comparison of a sample solution and standard color solution color. A.6.4 results found The color of the sample solution is not deeper than the standard colorimetric solution is through testing. 3102-

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