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GB 25537-2010: National food safety standards of food additives sodium lactate (solution)
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National food safety standards of food additives sodium lactate (solution)
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GB 25537-2010
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Basic data | Standard ID | GB 25537-2010 (GB25537-2010) | | Description (Translated English) | National food safety standards of food additives sodium lactate (solution) | | Sector / Industry | National Standard | | Classification of Chinese Standard | C54;X40 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 9,946 | | Date of Issue | 2010-12-21 | | Date of Implementation | 2011-02-21 | | Quoted Standard | GB 5009.74; GB 5009.12; GB/T 605 | | 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 the production of lactic acid by the fermentation method and after the reaction of sodium hydroxide and sodium carbonate or food additive made ??from sodium lactate (solution). | GB 25537-2010: National food safety standards of food additives sodium lactate (solution)---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 of food additives sodium lactate (solution)
National Food Safety Standard
Food additive sodium lactate (solution)
Issued on. 2010-12-21
2011-02-21 implementation
National Standards of People's Republic of China
People's Republic of China Ministry of Health issued
Foreword
Appendix A of this standard is a normative appendix.
National Food Safety Standard
Food additive sodium lactate (solution)
1 Scope
This standard applies to post-production by the fermentation of lactic acid and sodium hydroxide or sodium carbonate and sodium lactate food additives made of (dissolved
liquid).
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, structural formula, molecular formula and relative molecular mass
3.1 Chemical Name
3.2 formula
Formula 3.3
C3H5NaO3
3.4 relative molecular mass
112.06 (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
Colorless or slightly yellow color
Take appropriate sample is placed in a clean, dry beaker, in natural light
Under observe its color and texture, and smell its flavor. Odour odorless or slight characteristic odor
Slightly viscous clear liquid state organization
4.2 Physical indicators. to comply with Table 2.
Table 2. Physical and chemical indicators
project
index
Testing method
L- lactate (solution) sodium lactate (solution)
The total lactate, w /% ≥ 50.0a Appendix A A.3
L- lactate total lactate content, w /% ≥ 95 - Appendix A A.4
Chroma/(Hazen) ≤ 150 GB/T 605
pH 6.5 ~ 7.5 in Appendix A A.5
Chloride, w /% ≤ 0.05 A.6 in Appendix A
Heavy metals (Pb)/(mg/kg) ≤ 20 GB/T 5009.74
Lead (Pb)/(mg/kg) ≤ 2 GB 5009.12
Sulfate, w /% ≤ 0.005 Appendix A A.7
Citrate, oxalate, phosphate or tartrate A.8 by examining Appendix A
Sugar by examining Appendix A, A.9
The actual detection value is a 95% to 110.0% Labeling values.
Appendix A
(Normative)
Testing method
A.1 General Provisions
Unless otherwise indicated in the analysis using only recognized as analytical reagents and GB/T 6682-2008 specified in the water. In the analysis
Standard titration solution, impurities measured by standard solution, preparations and products, did not indicate when the other requirements, according to GB/T 601, GB/T
602, the provisions of preparation GB/T 603's. This solution was used in the test does not indicate what is formulated with solvent, it refers to an aqueous solution.
A.2 Identification Test
A.2.1 Reagents and materials
a) hydrochloric acid solution. 0.1 mol/L.
b) sulfuric acid solution. 1 mL of sulfuric acid added to 19 mL of water formulated into.
c) potassium permanganate test solution. 0.1 mol/L.
d) morpholino solution. 14.
e) sodium nitroprusside test solution. 50g/L.
A.2.2 Analysis step
A.2.2.1 Identification of Sodium. Take platinum wire, with a hydrochloric acid solution wet, dipped into the sample combustion in a colorless flame, the flame was bright yellow.
A.2.2.2 Identification of lactate. Take 5 mL sample was added 2 mL of sulfuric acid solution and mix together 2 mL of potassium permanganate solution, heating,
Should acetaldehyde gases. Recognition acetaldehyde gas mixture using an equal volume of morpholino solution and sodium nitroprusside test solution wetting
Filter paper, filter paper in contact with the gas phase was blue.
A.3 Determination of total sodium lactate
A.3.1 Reagents and materials
a) acetic anhydride.
b) glacial acetic acid.
c) perchloric acid standard titration solution. c (HClO4) = 0.1 mol/L.
d) crystal violet indicator solution. 5 g/L.
A.3.2 Analysis step
Weigh the equivalent of liquid sample containing about 300 mg of sodium lactate (accurate to 0.000 1 g), was added 10mL of acetic anhydride and 50 mL ice acetic
Acid, mixed, allowed to stand for about 20min, add 1 drop of crystal violet indicator solution, titration with perchloric acid standard solution titration, titrated to a solution blue
Green, do not fade in the 30s, is the end point of titration, and titration results of blank test correction.
A.3.3 Calculation Results
Sodium lactate (C3H5NaO3) content according to formula (A.1) Calculated.
() 1001121.0011 ××× - = m
cVVX% (A.1)
Where.
X1── sodium lactate (C3H5NaO3) content,%;
V1── sample titration consumption of perchloric acid standard titration solution volume in milliliters (mL);
V0── blank titration consumption of perchloric acid standard titration solution volume in milliliters (mL);
The actual concentration c── perchloric acid standard titration solution, expressed in moles per liter (mol/L);
0.1121── consumption of 1 mL 1 mol/L perchloric acid standard titration solution corresponds to 0.1121 g sodium lactate (C3H5NaO3);
Quality m── sample in grams (g).
Test results parallel arithmetic mean of the measurement results shall prevail. Parallel determination results is not more than 0.5% absolute difference.
A.4 L- lactate determination of total content of sodium lactate
A.4.1 Instruments and Equipment
High performance liquid chromatography with UV detection, detection wavelength was 254 nm.
A.4.2 reference chromatographic conditions
a) Column. stationary phase is silica gel coated 3μm novel optically active N, N- dioctyl -L (D) - alanine surface
Chiral column, 4.6mm × 50mm; or other equivalent separation performance of the column for optical isomers.
b) Mobile phase. 0.002 mol/L of copper sulfate (CuSO4 · 5H2O) was added.
c) flow rate. 1.2 mL/min.
d) Column temperature. 40 ℃.
e) Injection volume. 20μL.
f) separation. D and L-isomer separation in 1.0 above.
A.4.3 Analysis step
A.4.3.1 Preparation of sample solution
Weigh 1g sample (accurate to 0.001g), after dilution with the mobile phase and transferred to 100mL volumetric flask, add the mobile phase to the mark.
The resulting solution was filtered with a 0.45μm membrane, the filtrate was set aside.
A.4.3.2 Determination
High performance liquid chromatography sample was measured to obtain chromatograms, recorded D- L- sodium lactate and sodium lactate peak area AD
And AL, come percentage L- lactate content.
A.4.4 Calculation Results
L- lactate content of total lactate X2 according to formula (A.2) Calculated.
1002 × = DL
AA
AX% (A.2)
Where.
X2 - L- lactate total lactate content,%;
AL - L- sodium lactate peak area;
AD - D- lactate chromatographic peak area.
The results parallel arithmetic mean of the measurement results shall prevail. Parallel determination results is not more than 0.5% absolute difference.
A.5 pH measurement
Take 1 part of the sample, 5 parts of an equal volume of water to prepare a solution to be measured (15), after shaking meter for measuring pH.
A.6 Determination of chloride
A.6.1 Reagents and materials
a) Chloride standard solution. 0.1mg/mL. When used, this standard solution was diluted 10-fold, so that the chloride concentration of 0.01 mg/mL.
b) a nitric acid solution. 12.
c) silver nitrate. 17 g/L.
A.6.2 Analysis step
Weigh 1.00 g sample was dissolved in water, transferred to a 50 mL volumetric flask, add water to volume, shake. Imbibe 5 mL
This sample was placed in 50 mL colorimetric tube, add water to make into approximately 35mL, plus 10mL nitric acid solution plus 1 mL of silver nitrate solution, adding
Diluted with water to 50 mL, shake, in the dark place 5min, placed on a black background, which can not be deeper than the standard turbidity tube.
Preparation of standard tube. Imbibe 5mL chloride standard solution and the sample tube diluted 10 times, while the same treatment.
Determination A.7 sulfate
A.7.1 Reagents and materials
a) hydrochloric acid solution. 3 mol/L.
b) barium chloride solution. 250 g/L.
c) sulfate standard solution. 0.1mg/mL.
A.7.2 Analysis step
Weigh 2.00g sample was placed in 50mL colorimetric tube, add water, add hydrochloric acid to neutral, diluted with water to continue about 40mL,
Add 2mL of hydrochloric acid solution, shake, add 5mL barium chloride solution, diluted with water to 50mL, shake well, place 10min, placed in black back
The King, compared with the standard tube, turbidity shall not be deeper than the standard tube.
Preparation of standard tube. Imbibe 1mL sulfate standard solution and the sample tube while the same treatment.
A.8 citrate, oxalate, phosphate or tartrate measured
A.8.1 Reagents and materials
a) ammonia solution. 11.
b) hydrochloric acid solution. 15.
c) calcium chloride solution. 75 g/L. Weigh 7.5g of calcium chloride (CaCl2 · 2H2O), dissolved in water, dilute the volume to 100 mL.
A.8.2 Analysis step
Draw 5 mL sample was diluted with freshly boiled and cooled water to 50mL. Take 4 mL of the diluted sample solution, with ammonia solution or hydrochloric acid
Solution adjusting the sample solution pH 7.3 to 7.7, after adding 1mL calcium chloride solution in a boiling water bath for heating pot 5min, a solution may not cause turbidity, namely
Through inspection.
A.9 Determination of reducing sugar
In 10mL hot Fehling solution, add 5 drops of the sample should be no red precipitate.
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