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National Food Safety Standard -- Food Additives -- Polyvinyl alcohol
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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. |
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......
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