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GB 8820-2010: National food safety standards of food additives -- Zinc gluconate
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National food safety standards of food additives -- Zinc gluconate
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GB 8820-2010
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| GB 8820-1988 | English | 359 |
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Food additive--Zinc gluconate
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Basic data
| Standard ID | GB 8820-2010 (GB8820-2010) |
| Description (Translated English) | National food safety standards of food additives -- Zinc gluconate |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | C54 |
| Classification of International Standard | 67.220.20 |
| Word Count Estimation | 9,953 |
| Date of Issue | 2010-12-21 |
| Date of Implementation | 2011-02-21 |
| Older Standard (superseded by this standard) | GB 8820-1988 |
| 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 calcium gluconate as the starting material, acidified with zinc compound or to gluconolactone zinc compounds as raw materials and food additives prepared by the reaction of zinc gluconate. |
GB 8820-2010: National food safety standards of food additives -- Zinc gluconate
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National food safety standards of food additives - zinc gluconate
National Standards of People's Republic of China
National Food Safety Standard
Food additive zinc gluconate
Issued on. 2010-12-21
2011-02-21 implementation
People's Republic of China Ministry of Health issued
Foreword
This standard replaces GB 8820-1988 "food additive zinc gluconate."
This standard compared with GB 8820-1988, the main changes are as follows.
- Test method to modify the differential response (2) of the sample volume;
- Increasing the pH indicator and test methods;
- Modify the test method for determination of chloride;
- Modify the test method for determination of sulphate;
- Cancel the moisture determination of Fischer titration;
- Modify the technical requirements for the moisture loss on drying;
- Modify the test method for reducing substances;
- Cadmium (Cd) is amended as indicators by the ≤0.0005% ≤2 (mg/kg);
- Lead (Pb) is amended as indicators by the ≤0.001% ≤3 (mg/kg).
Appendix A of this standard is a normative appendix.
This standard replaces the standards previously issued as follows.
--GB 8820-1988.
National Food Safety Standard
Food additive zinc gluconate
1 Scope
This standard applies to calcium gluconate as a starting material, by acidification or reaction with zinc compound to gluconolactone and zinc as a raw material
Compounds obtained by the reaction of zinc gluconate food additives.
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, molecular formula, molecular mass and structural formula
3.1 Chemical Name
D- zinc gluconate
Formula 3.2
C12H22O14Zn
3.3 formula
HOH2C C
OH
CC
OH
OH
OH
COO
Zn 2
3.4 relative molecular mass
455.70 (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
White or white color proper amount of sample is placed in a clean, dry white porcelain dish, natural
Light, observe its color and texture. Organization status particles or crystalline powder
4.2 Physical indicators. to comply with Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Zinc gluconate (C12H22O14Zn, dry basis), w /% 97.0 ~ 102.0 Appendix A A.4
Chloride (Cl dollars), w /% ≤ 0.05 Appendix A A.5
Sulfate (SO4 dollars), w /% ≤ 0.05 GB/T 9728
Reducing substance (in C6H12O6 dollars), w /% ≤ 1.0 A.6 in Appendix A
Loss on drying, w /% ≤ 11.6 Appendix A A.7
Arsenic (As)/(mg/kg) ≤ 3 Appendix A A.8
pH (10.0g/L solution) 5.5 ~ 7.5 GB/T 9724
Cadmium (Cd)/(mg/kg) ≤ 2 Appendix A A.9
Lead (Pb)/(mg/kg) ≤ 3 GB 5009.12
Appendix A
(Normative)
Testing method
A.1 Safety Tips
Reagents The standard test methods used for toxic or corrosive, according to the relevant provisions of the operation, should be used with caution.
If splashed on the skin should immediately wash with water, severe cases should be treated immediately. When using a volatile acid, to be carried out in a fume hood.
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, GB/T 602, GB/T 603 provisions of the preparation.
A.3 Identification Test
A.3.1 Reagents and materials
A.3.1.1 potassium ferrocyanide solution. 100g/L.
A.3.1.2 hydrochloric acid solution. 14.
A.3.1.3 phenylhydrazine.
A.3.1.4 glacial acetic acid.
A.3.2 Identification Test
A.3.2.1 Identification of zinc
A.3.2.1.1 Method summary
Potassium ferrocyanide test solution is reacted with zinc to form a white precipitate, insoluble precipitate in dilute hydrochloric acid, thereby discriminating zinc ions.
A.3.2.1.2 analysis step
Weigh 1.0 g laboratory samples, accurate to 0.01 g, placed in 50 mL test tube, add 20 mL of water to dissolve, if necessary, heating
Dissolution, Gaja iron potassium cyanide solution, which occurred in a white precipitate, separation, precipitation not dissolved in dilute hydrochloric acid.
A.3.2.2 Identification of glucose
A.3.2.2.1 Method summary
Sample in acetic acid medium, and phenylhydrazine were hot, a yellow crystalline glucose acid phenylhydrazine.
A.3.2.2.2 analysis step
Weigh 0.5 g laboratory samples, accurate to 0.01 g, add 10 mL of water, was dissolved (heating if necessary), take 5 mL, add 0.7 mL
Glacial acetic acid and 1 mL of freshly distilled phenylhydrazine, in a water bath heated 30min, to room temperature, the inner wall of the tube with a glass rod friction, the yellow precipitate
Colored crystals.
A.4 Determination of zinc gluconate
A.4.1 Method summary
Chrome black T as indicator, with disodium edetate standard sample solution droplets given titration according disodium edetate
The amount of standard titrant, calculate the content of C12H22O14Zn meter zinc gluconate.
A.4.2 Reagents and materials
A.4.2.1 ammonia - ammonium chloride buffer solution (pH≈10).
A.4.2.2 chrome black T indicator.
A.4.2.3 disodium EDTA standard titration solution. c (EDTA) = 0.05 mol/L.
A.4.3 Analysis step
Weigh 0.5 g laboratory samples, accurate to 0.000 1 g, add 100 mL of water to dissolve (heating if necessary), put to room temperature,
5 mL ammonia - ammonium chloride buffer solution, a little chrome black T indicator, using disodium edetate standard solution titration until the solution changed from purple
Pure blue, and titration with blank test correction, per 1 mL of edetate disodium titrant (0.05 mol/L) is quite
To 22.78 mg of C12H22O14Zn.
A.4.4 Calculation Results
Zinc gluconate (to C12H22O14Zn meter) mass fraction w1, expressed in%, according to equation (A.1) Calculated.
() 100%
(1) 1000
VV c Mw
mw
- × × = ×× - × (A.1)
Where.
V-- laboratory sample consumption disodium edetate standard titrant volume values in milliliters (mL);
V0 empty - white test consumption value disodium edetate standard titrant volume in milliliters (mL);
c B - tetraacetic acid disodium titrant concentration standard value in units of moles per liter (mol/L);
Numerical m1-- laboratory sample mass, in grams (g);
w3 is --A.7 measured the mass fraction of the loss on drying of laboratory samples, values expressed by%.
Numerical M-- zinc gluconate (C12H22O14Zn) molar mass in grams per mole (g/mol) (M = 455.70).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.2%.
A.5 Determination of chloride
A.5.1 Reagents and materials
A.5.1.1 nitric acid solution. 25 → 100.
A.5.1.2 silver nitrate solution. 17 g/L.
A.5.1.3 sodium chloride standard solution. 1ml each containing 0.01 mg of Cl.
A.5.2 Analysis step
Weigh 1.0g ± 0.01g laboratory samples, set 100 mL volumetric flask, add 80 mL of water to dissolve, then diluted with water to the mark,
Shake, is the laboratory sample solution. Pipette 10.0 mL laboratory sample solution 5mL ± 0.05mL standard solution of sodium chloride,
According to GB/T 9729 Determination.
A.6 Determination of reducing substances
A.6.1 Method summary
Sugar will restore divalent copper ions into cuprous oxide, cupric ions remaining under acidic conditions with iodine ions react quantitatively
Iodine, sodium thiosulfate standard solution titration of iodine generated to calculate the reducing sugar content in the sample.
A.6.2 Reagents and materials
A.6.2.1 alkaline copper citrate solution preparation.
Solution A. Weigh 173 g of sodium citrate (sodium citrate) and 100g of anhydrous sodium carbonate, warm water to dissolve into a 700mL (if the solution
Significant turbidity, filtration clarification).
Solution B. Weigh 17.3 g of copper sulfate crystals were added to 100mL water dissolve.
Take 100mL solution prior to use B, shaking constantly, slowly added 700mL solution A, after cooling, add water to 1000mL.
A.6.2.2 iodine standard solution. c (1/2I2) = 0.05mol/L.
A.6.2.3 sodium thiosulfate standard titration solution. c (Na2S2O3) = 0.1mol/L.
A.6.2.4 starch indicator solution. 10g/L.
A.6.2.5 acetic acid solution. 127.
A.6.2.6 hydrochloric acid solution. 3mol/L.
A.6.3 Analysis step
Weigh 1.0g laboratory samples, accurate to 0.0001g, set 250mL iodine flask, add 10mL of water (if necessary heated) to dissolve,
Cooled to room temperature, precision by adding 25.0 mL of alkaline copper citrate solution, bottle with a small surface covered dish, after an accurate micro-boiling 5min, rapid cooling
To room temperature, add 25.0mL of acetic acid solution, shake, precision by adding 10.0mL standard iodine solution, Mesa, shake, place 10 min, added
10.0 mL of hydrochloric acid solution, plus 3.0 mL of starch indicator solution, immediately with sodium thiosulfate standard solution titration until the solution was light blue, and the
Titration with blank test correction. Per milliliter of sodium thiosulfate standard solution is equivalent to 2.7mg glucose.
A.6.4 Calculation Results
Reducing sugar (in terms C6H12O6) mass fraction w 2, the value is expressed in% according to formula (A.2) Calculated.
() 100%
VV c Mw
- × × = ×× (A.2)
Where.
Numerical sodium thiosulfate standard titration solution consumed V0-- blank titration solution volume in milliliters (mL);
Numerical sodium thiosulfate standard titration V1-- titration laboratory sample solution is consumed by the solution volume in milliliters (mL);
Numerical c-- actual sodium thiosulfate standard titration solution concentration, expressed in moles per liter (mol/L);
Numerical m2-- laboratory sample mass, in grams (g);
Numerical M-- reducing sugar (3/20C6H12O6) molar mass in grams per mole (g/mol) (M = 27).
A.7 Determination of loss on drying
A.7.1 Instruments and Equipment
Ovens.
A.7.2 Analysis step
Weigh 1.0 g powder laboratory samples, accurate to 0.000 1 g, has been placed at 105 ℃ ± 2 ℃ drying to constant weight weighing bottle,
Accurately weighed, and then set within 105 ℃ ± 2 ℃ oven dried to constant weight loss reduction from the quality and kind of calculation, said the loss on drying of the sample.
A.7.3 Calculation Results
Zinc gluconate drying loss mass fraction w3, values in%, according to formula (A.3) Calculated.
100% m mw
mm
- = × - (A.3)
Where.
Quality m0-- weighing bottle value in units of grams (g);
Numerical m3-- weighing bottles and dried before laboratory sample mass, in grams (g);
Numerical m4-- weighing bottles and dried laboratory sample mass, in grams (g).
Take the arithmetic mean of the parallel determination results of the measurement results, the results of two parallel determination of the absolute difference is not more than 0.5%.
A.8 Determination of Arsenic
Weigh 2.5g ± 0.01g laboratory samples, dissolved in water, and dilute to 25.0 mL, weighed 10.0 mL, (equivalent to the original sample
1.0 g), according to GB/T 5009.76 Method II Gutzeit method. 3mL ± 0.05mL amount of arsenic standard solution (containing 0.003 mg of arsenic),
Preparation of standard solution of arsenic limit. Test solution and arsenic standard solution 3 mL (arsenic 0.003 mg) control solution made, not deeper.
A.9 Determination of cadmium
Weigh 2.5g ± 0.0002g laboratory sample was added nitric acid (10g/L) were dissolved and set the volume to 25mL. Press the rest of GB/T 15337
Determination.
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