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GB 19645-2010: National food safety standard -- Pasteurized milk
Status: Valid GB 19645: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 19645-2010 | English | 169 |
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National food safety standard -- Pasteurized milk
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GB 19645-2010
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| GB 19645-2005 | English | 239 |
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Hygienic standard for pasteurized and sterilized milk
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GB 19645-2005
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PDF similar to GB 19645-2010
Basic data | Standard ID | GB 19645-2010 (GB19645-2010) | | Description (Translated English) | National food safety standard -- Pasteurized milk | | Sector / Industry | National Standard | | Classification of Chinese Standard | C53;X16 | | Classification of International Standard | C53; X16 | | Word Count Estimation | 7,781 | | Date of Issue | 2010-03-26 | | Date of Implementation | 2010-12-01 | | Older Standard (superseded by this standard) | GB 19645-2005; GB 5408.1-1999 ial | | Regulation (derived from) | Circular of the Ministry of Health (2010)7 | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This Chinese standard applies to whole milk, skimmed and partly skimmed pasteurized milk. | GB 19645-2010: National food safety standard -- Pasteurized milk---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.Pasteurized milk
National Standards of People's Republic of China
GB 25543-2010
People's Republic of China Ministry of Health issued
Issued on. 2010-12-21
2011-02-21 implementation
National Food Safety Standard
Food additives L- alanine
GB 25543-2010
Foreword
Appendix A of this standard is a normative appendix.
GB 25543-2010
National Food Safety Standard
Food additives L- alanine
1 Scope
This standard applies to L- aspartic acid as raw material, obtained by enzymatic production of food additives L- alanine.
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 formula, relative molecular mass and structural formula
Formula 3.1
C3H7NO2
3.2 formula
3.3 relative molecular mass
89.09 (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
Color White take appropriate laboratory sample, placed in a clean, dry white porcelain dish, in
Natural light, visual observation, smelling the odor. Organization state crystal or crystalline powder
4.2 Physical indicators. to comply with Table 2.
GB 25543-2010
Table 2. Physical and chemical indicators
Item Index Test Method
L- alanine (dry basis), w /% 98.5 ~ 101.5 Appendix A A.4
Loss on drying, w /% ≤ 0.20 Appendix A A.5
pH (50g/L solution) 5.7 ~ 6.7 in Appendix A A.6
Arsenic (As)/(mg/kg) ≤ 1 Appendix A A.7
Heavy metals (Pb)/(mg/kg) ≤ 10 Appendix A A.8
Residue on ignition, w /% ≤ 0.20 A.9 in Appendix A
Specific rotation αm (20 ℃, D)/[(º) · dm2 · kg-1] 13.5 ~ 15.5 Appendix A A.10
GB 25543-2010
Appendix A
(Normative)
Testing method
A.1 Warning
Some test procedures prescribed test method can lead to dangerous situations. The operator shall take appropriate safety and health practices.
A.2 General Provisions
Unless otherwise indicated in the analysis using only confirm three analytical grade reagents and water GB/T 6682-2008 stipulated.
Test Methods standard titration solution, when measured impurity standard solution, preparations and products, with no other requirements noted,
According to GB/T 601, the provisions of GB/T 602 and GB/T 603 of the preparation.
A.3 Identification Test
A.3.1 Reagents and materials
A.3.1.1 potassium permanganate.
A.3.1.2 indane trione solution. 20g/L. Weigh 20.0g indane trione, soluble in water, dilute to 1000mL.
A.3.1.3 sulfuric acid solution. 130.
A.3.2 Analysis step
A.3.2.1 indane trione test
Weigh about 1g laboratory samples, accurate to 0.1g, dissolved in 1000mL of water of this solution 5mL, adding 1mL indane trione dissolved
Was heated to boiling, after about 3min was purple.
A.3.2.2 oxidation test
Weigh about 0.2g laboratory samples were dissolved in 10mL sulfuric acid solution was added 0.1g of potassium permanganate, boiled, stimulate a strong odor
Acetaldehyde.
Determination A.4 L- phenylalanine content
A.4.1 Method summary
Sample formic acid as a co-solvent, glacial acetic acid as solvent, crystal violet as indicator, titration with perchloric acid standard solution titration, according to
Consumption volume perchloric acid standard titration solution content is calculated L- alanine.
A.4.2 Reagents and materials
A.4.2.1 glacial acetic acid.
A.4.2.2 anhydrous formic acid.
A.4.2.3 perchloric acid standard titration solution. c (HClO4) = 0.1 mol/L.
A.4.2.4 crystal violet indicator solution. 2g/L.
A.4.3 Analysis step
A.4.3.1 Weigh about 0.2g A.5 of dried A, accurate to 0.0001g, placed in 250mL dry conical flask, add 3mL no
Aqueous formic acid dissolved, add 50mL glacial acetic acid, add 2 drops of crystal violet indicator solution, titration with perchloric acid standard solution titration until the solution changed from blue
A blue-green endpoint.
GB 25543-2010
A.4.3.2 measured at the same time, according to the same procedure and the determination of the sample without using the same amount of reagent blank test solution
Experience.
A.4.4 Calculation Results
L- alanine (C3H7NO2) mass fraction w1, expressed in%, according to formula (A.1) Calculated.
)( twenty one
1 ××
- =
cMVVw% (A.1)
Where.
V1-- sample consumption of perchloric acid standard titration solution (A.4.2.3) the value of the volume, in milliliters (mL);
V2-- blank consumption perchloric acid standard titration solution (A.4.2.3) the value of the volume, in milliliters (mL);
Accurate c-- perchloric acid standard titration solution concentration value in units of moles per liter (mol/L);
m-- sample mass value in grams (g);
M - L- alanine numerical molar mass in grams per mole (g/mol) (M = 89.09).
The arithmetic average of the results of two parallel determination for reporting results. Two parallel determination results is not more than 0.3% absolute difference.
A.5 Determination of loss on drying
According to GB/T 6284 carried out. Measured, weighed 1g ~ 2g laboratory samples, accurate to 0.0001g. Take two parallel determination results
The arithmetic average of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.03%. The remaining portion was dried (this is the dry
Dry matter A) used in the determination of L- alanine.
A.6 pH measurement of
According to GB/T 9724 carried out. Measured, weighed about 5g laboratory samples, accurate to 0.01g, add about 20mL of water-soluble carbon dioxide-free
Solution and diluted to 100mL after measurement.
A.7 Determination of Arsenic
According to GB/T 5009.76 Gutzeit method. It said measured taking about 1g laboratory samples, accurate to 0.01g. Limited standard solution preparation.
Pipette Pipette 1.00mL limit arsenic standard solution (arsenic 0.001mg), and treated in the same sample at the same time.
A.8 Determination of Heavy Metals
A.8.1 Reagents and materials
A.8.1.1 thioacetamide solution. Weigh thioacetamide about 4g, accurate to 0.1g, dissolved in 100mL of water, placed in the refrigerator warranty
Deposit. Immediately prior to taking this solution 1.0mL was added in advance by the sodium hydroxide solution (40g/L) 15mL, 5mL water and glycerol mixture consisting of 20mL
Combined solution 5mL, placed 20s, immediately cooled using a water bath heated.
A.8.1.2 carbon dioxide-free water.
A.8.1.3 ammonium acetate buffer, pH = 3.5. Weigh 25.0g of ammonium acetate, 25mL dissolved in water, add 45mL 6mol/L hydrochloric acid,
Adjusted with dilute hydrochloric acid or dilute aqueous ammonia pH = 3.5 was diluted with water to 100mL.
A.8.1.4 Lead (Pb) standard solution. 1μg/mL. This solution was prepared just before use.
A.8.2 Analysis step
Weigh about 10 g laboratory samples, accurate to 0.01g, with about 60mL no carbon dioxide dissolved in water and diluted to 100mL, is like
GB 25543-2010
Solution. Draw the sample solution 12mL, 25mL stoppered placed colorimetric tube, the tube is A. Absorb lead standard solution 10mL and 2mL
The sample was placed in 25mL colorimetric tube with a stopper, shake, is the B tube (standard). Absorb carbon dioxide-free water and 10mL 2mL sample
Solution set 25mL colorimetric tube with a stopper, shake, is the C tube (blank). In A, B, C the tube, each 2mL was added ammonium acetate buffer
Red solution, shake, respectively dropping 1.2mL acetyl ammonium thiosulfate solution, rapid mixing.
With respect to the tube C, B show a light brown pipe. 2min, the color should not be deeper than the pipe A B tube.
A.9 Determination of residue on ignition
A.9.1 Reagents and materials
A.9.1.1 sulfuric acid.
A.9.1.2 sulfuric acid solution. 18.
A.9.2 Analysis step
Weigh about 2g ~ 3g laboratory samples, accurate to 0.0001g, set to a constant burning quality porcelain crucible at 800 ℃ ± 25 ℃,
Adding an appropriate amount of sulfuric acid solution sample is completely wet. With warm heat, until the sample is completely carbonized, cooled. Plus about 0.5mL of sulfuric acid residues soaked
Slag, using the above method is heated to sulfuric acid vapor Yat do. Burning at 800 ℃ ± 25 ℃ 45min. Cool to room temperature in a desiccator, and weigh.
A.9.3 Calculation Results
Burning residue mass fraction w2, expressed in%, according to formula (A.2) Calculated.
10012 × = m
mw% (A.2)
Where.
m-- sample mass value in grams (g);
m1-- residue mass value in grams (g).
The arithmetic average of the results of two parallel determination for reporting results. Two parallel determination results of absolute difference is not more than 0.02%.
A.10 Determination of specific rotation
A.10.1 Weigh 10g laboratory samples, accurate to 0.0001g, plus hydrochloric acid solution (11) was dissolved and transferred to 100mL volumetric flask and
With dilute hydrochloric acid solution (11) and shake.
(20, D) ℃ Specific rotation αm numerical order (°) · dm2 · kg-1 according to formula (A.3) Calculated.
αm (20 ℃, D) l α
ρ = (A.3)
Where.
α - measured angle of rotation, in degrees (°);
l - the length of the optical tube unit decimeter (dm);
ρα - mass concentration in the solution effective component in grams per milliliter (g/mL).
A.10.2 Other press GB/T 613 performed.
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