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GB 31630-2014 English PDF

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GB 31630-2014: National Food Safety Standard -- Food Additives -- Polyvinyl alcohol
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GB 31630-2014English279 Add to Cart 3 days [Need to translate] National Food Safety Standard -- Food Additives -- Polyvinyl alcohol Valid GB 31630-2014

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Basic data

Standard ID GB 31630-2014 (GB31630-2014)
Description (Translated English) National Food Safety Standard - Food Additives - Polyvinyl alcohol
Sector / Industry National Standard
Classification of Chinese Standard C54
Classification of International Standard 67.020
Word Count Estimation 12,123
Date of Issue 12/24/2014
Date of Implementation 5/24/2015
Issuing agency(ies) National Health and Family Planning Commission of the People's Republic of China
Summary This Standard is applicable to the legal system of ethylene and acetylene food additive polyvinyl alcohol.

Similar standards

GB 31617   GB 31633   GB 28316   GB 31623   GB 31627   GB 31620   

GB 31630-2014: National Food Safety Standard -- Food Additives -- Polyvinyl alcohol

---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 standard.Food Additives.Polyvinyl alcohol) National Standards of People's Republic of China National Food Safety Standard Food Additives polyvinyl alcohol Published 2014-12-24 2015-05-24 implementation People's Republic of China National Health and Family Planning Commission issued National Food Safety Standard Food Additives polyvinyl alcohol

1 Scope

This standard applies to ethylene and acetylene method were food additives polyvinyl alcohol. Formula 2

3 Technical requirements

3.1 Sensory requirements. shall meet the requirements in Table 1. Table 1 Sensory requirements Project requires test methods Color status Transparent, white or pale yellow Granular powder Proper amount of sample is placed in a 50mL beaker, under natural light Concept Color and state police 3.2 Physical indicators. to comply with Table 2. Table 2. Physical and chemical indicators Item Index Test Method Loss on drying (w) /% ≤ 5.0 Appendix A A.4 Residue on ignition (w) /% ≤ 1.0 A.5 Water insoluble (w) /% ≤ 0.1 A.6 Particle size (by 0.150mm test sieve, w) /% ≥ 99.0 A.7 Methanol and methyl acetate (w) /% ≤ 1.0 A.8 Acid number (as KOH)/(mg/g) ≤ 3.0 A.9 Ester Value (as KOH)/(mg/g) 125 ~ 153 A.10 The degree of hydrolysis (w) /% 86.5 ~ 89.0 A.10 Viscosity (4% solution, 20 ℃) / (mPa · s) 4.8 ~ 5.8 A.11 Lead (Pb)/(mg/kg) ≤ 2 GB 5009.12

Appendix A

Testing method A.1 Warning Reagents of this standard test method for use in corrosive or toxic, the operation should take appropriate safety and protective measures. A.2 General Provisions This standard reagents and water, in the absence of other requirements specified, refer to three predetermined water analytical reagents and GB/T 6682 in. Used in the test standard titration solution, impurity standard solution, formulations and products, in the absence of other requirements specified, are by GB/T 601, GB/T 602, GB/T 603 specified prepared. When used in a solution prepared with a solvent which is not specified, refer to an aqueous solution. A.3 Identification Test A.3.1 pH Weigh 1g sample pH was measured in accordance with 12010.4-2010 GB/T , should be 5.0 to 6.5. A.3.2 IR IR spectra of the sample in potassium bromide as a dispersant B.1 to be consistent with FIG. A color reaction A.3.3 A.3.3.1 Reagents and materials A.3.3.1.1 iodine solution. dissolve 14g in 100mL of water and 36g potassium iodide, add 3 drops of hydrochloric acid, diluted with water to 1000mL, Shake well. A.3.3.1.2 boric acid solution. dissolve 1g of boric acid in 25mL of water, shake well. A.3.3.2 identification method Weigh about 0.01g sample, placed in a beaker filled with 100mL of water, a suitable sample was dissolved by heating, cooled to room temperature, take 5mL test Sample solution, 1 drop of iodine solution was added dropwise a few drops of boric acid solution. Sample solution should appear blue. A.3.4 B color reaction Weigh about 0.5g sample was placed in a beaker filled with 10mL water, a suitable sample was dissolved by heating, cooled to room temperature, a sample taken 5mL Solution, 1 drop of iodine solution was allowed to stand. Sample solution was dark red to blue color should be. A.3.5 precipitation reaction Take 5mL color reaction of the sample solution prepared in B, was added 10mL of ethanol, to be cloudy or floc precipitation. Determination of loss on drying A.4 A.4.1 Instruments and Equipment A.4.1.1 weighing bottle. φ60mm × 30mm. A.4.1.2 electric oven. 105 ℃ ± 2 ℃. A.4.2 Analysis step Was used at 105 ℃ ± 2 ℃ dried to constant mass in the weighing bottle was weighed sample of about 5g, accurate to 0.0002g, in At 105 ℃ ± 2 ℃ dried 3h. Placing weighed to room temperature in a desiccator. A.4.3 calculation results Loss on drying of the mass fraction w1 according to formula (A.1) is calculated. w1 = m1-m2 m × 100% (A.1) Where. M1 --- weighing bottle and the sample before drying mass in grams (G); --- M2 dried weighing bottle and the sample mass in grams (G); --- m sample mass, in grams (g). The test result to the arithmetic mean of replicates results. Obtained in two independent determination results under repeatability conditions of absolute difference Than the arithmetic mean value of not more than 2%. Determination of residue on ignition A.5 A.5.1 Instruments and Equipment A.5.1.1 porcelain crucible. 100mL. A.5.1.2 furnace temperature. 800 ℃ ± 25 ℃. A.5.2 Analysis step Weigh about 2g sample, accurate to 0.0002g, was placed in a constant quality porcelain crucible at 800 ℃ ± 25 ℃, placed on a hot plate Heated slowly until the sample is completely dried and carbonized, and then transferred to ± 25 ℃ deg.] C in a high temperature burning furnace 800 to a constant mass. A.5.3 calculation results The ignition residue content w2 according to formula (A.2) is calculated. w2 = m1-m2 m × 100% (A.2) Where. Mass M1 --- porcelain crucible and the residue, in grams (G); m2 --- porcelain crucible mass, in grams (g); --- m sample mass, in grams (g). The test result to the arithmetic mean of replicates results. Obtained in two independent determination results under repeatability conditions of absolute difference Value is not more than 0.2%. Determination of insoluble matter A.6 A.6.1 Instruments and Equipment A.6.1.1 sintered glass crucible. filter plate pore size of about 100μm ~ 160μm. A.6.1.2 electric oven. 105 ℃ ± 2 ℃. A.6.2 Analysis step Weigh about 10g sample to the nearest 0.01g, was placed in a 500mL beaker was added 100mL immediately heated to boiling water, to dissolve. Was stirred and cooled 1h. At 105 ℃ ± 2 ℃ dried to constant mass sintered glass crucible was filtered, washed with hot water 3 to 5 times. The sintered glass crucible into the electric oven at 105 ℃ ± 2 ℃ dried to constant mass. A.6.3 calculation results Insoluble content of the water mass fraction w3 according to formula (A.3) is calculated. w3 = m1-m2 m × 100% (A.3) Where. Mass M1 --- sintered glass crucible and a water-insoluble substance in grams (G); Glass sand mass M2 --- crucible in grams (G); Sample mass m ---, in grams (g). The test result to the arithmetic mean of replicates results. Obtained in two independent determination results under repeatability conditions of absolute difference Is not greater than 0.05%. A.7 measured particle size (by 0.150mm test sieve) of A.7.1 Instruments and Equipment A.7.1.1 Test sieves. φ200mm × 50mm-0.150/0.1GB/T 6003.1-2012, with the sieve cover and a sieve bottom. A.7.1.2 Electric Sieve Shaker. vibration frequency of 100 times/min ~ 300 times/min, the amplitude of 1mm ~ 6mm. A.7.2 Analysis step The clean, dry test 0.150mm sieve test sieve placed on a chassis, mounted together on an electric shaker. Weigh about 100g sample, Accurate to 0.1g, placed on a sieve, add the sieve cover. Start electric oscillator, amplitude of 2 mm, a frequency of 150 times/min, vibration 30min ± 10s, after removing the sieve and stops oscillating chassis, said mass of the sample taken at the test sieves. It may be measured by manual methods. A.7.3 calculation results Particle size (by sieve test 0.150mm) according to a mass fraction w4 of formula (A.4) is calculated. w4 = m1 m × 100% (A.4) Where. --- the mass M1 sieve material in grams (G); --- m sample mass, in grams (g). The test result to the arithmetic mean of replicates results. Obtained in two independent determination results under repeatability conditions of absolute difference Is not greater than 0.05%. Determination of methanol and methyl acetate A.8 A.8.1 Reagents and materials A.8.1.1 acetone. A.8.1.2 methanol. 1.2% (volume fraction). A.8.1.3 acetate solution. 1.2% (volume fraction). A.8.2 Instruments and Equipment A.8.2.1 stoppered bottle. 100mL. A.8.2.2 water bath. A.8.2.3 gas chromatograph. A.8.3 Reference chromatographic conditions A.8.3.1 Chromatography Detector. hydrogen flame ionization detector. A.8.3.2 Column. RSD < 3%. A.8.3.3 Column temperature. 160 ℃. A.8.3.4 Inlet temperature. 160 ℃. A.8.3.5 detection temperature. 160 ℃. A.8.3.6 carrier gas. high purity nitrogen. A.8.3.7 flow rate. 30mL/min. A.8.3.8 injection volume. 0.4μL. A.8.4 Analysis step A.8.4.1 standard solution. methanol solution were pipetted solution and 2.00mL of methyl acetate, was placed a stoppered flask, acetone and 30μL 98mL water. Cork tightly, placed in a boiling water bath, shaking continuously, out until a clear solution was cooled to room temperature. A.8.4.2 sample solution. Weigh 2.0g sample, accurate to 0.0002g, placed in a stoppered flask, 30μL of acetone and 98mL water. cover Tight stopper, placed in a boiling water bath, continuously shaken until a clear solution was taken out was cooled to room temperature. A.8.4.3 Assay. The standard solution and each sample solution was injected according to injection volume, record the peak area. A.8.5 calculation results Methanol or methyl acetate content of the mass fraction w5 by formula (A.5) Calculated. w5 = Aa × A0 Aa0 × 0.024 m × 100% (A.5) Where. A --- test sample solution response peak of the peak area of methanol or methyl acetate; A0 --- test standard solution peak area response of methanol or methyl acetate; --- 0.024 quality standard titration solution of acetone in grams (G); AA --- acetone solution of the test sample in response to the peak of the peak area; AA0 --- acetone solution of the test standard peak response peak area; --- m sample mass, in grams (g). The test result to the arithmetic mean of replicates results. Obtained i......