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GB 25592-2010: National food safety standards of food additives ammonium aluminum sulfate
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National food safety standards of food additives ammonium aluminum sulfate
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GB 25592-2010
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Standard similar to GB 25592-2010 GB 22216 GB 25576 GB 25585 GB 25586 Basic data | Standard ID | GB 25592-2010 (GB25592-2010) | | Description (Translated English) | National food safety standards of food additives ammonium aluminum sulfate | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 10,192 | | Date of Issue | 2010-12-21 | | Date of Implementation | 2011-02-21 | | 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 companion in sulfuric acid and sulfuric acid by adding water, heated to dissolve, filtered, concentrated and crystallized from a food additive cooling aluminum sulfate press. | GB 25592-2010: National food safety standards of food additives ammonium aluminum sulfate---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 ammonium aluminum sulfate
National Food Safety Standard
Food additive aluminum ammonium sulfate
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 aluminum ammonium sulfate
1 Scope
This standard applies to aluminum sulfate in water with ammonium sulfate, dissolved by heating, filtered, concentrated and cooling crystallized sulfur food additive
Acid aluminum chloride.
2 Normative references
The standard file referenced in the application of this standard is essential. For dated references, only the edition date of the note
Apply to this standard. For undated references, the latest edition (including any amendments) applies to this standard.
3 formula and relative molecular mass
Formula 3.1
AlNH4 (SO4) 2 · 12H2O
3.2 relative molecular mass
453.33 (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 or colorless proper amount of sample is placed in 50mL beaker was observed under natural light color
Chak and texture. Crystalline powder or massive state organization
4.2 Physical indicators. to comply with Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Ammonium aluminum sulfate [to Al NH4 (SO4) 2 · 12H2O count] (dry basis), w /% 99.5 ~ 100.5 Appendix A A.4
Water, w /% ≤ 4.0 A.5 in Appendix A
Water-insoluble, w /% ≤ 0.20 A.6 in Appendix A
TABLE 2 (cont.)
Item Index Test Method
Arsenic (As)/(mg/kg) ≤ 2 Appendix A A.7
Heavy metals (Pb)/(mg/kg) ≤ 20 Appendix A A.8
Lead (Pb)/(mg/kg) ≤ 10 Appendix A A.9
Fluorides (as F)/(mg/kg) ≤ 30 Appendix A A.10
Selenium (Se)/(mg/kg) ≤ 30 Appendix A A.11
Appendix A
(Normative)
Testing method
A.1 Warning
Reagents The standard test methods used for toxic or corrosive, be careful when operating! As should be immediately splashed on the skin
Rinsed with water, severe cases should be treated immediately.
A.2 General Provisions
The standard test methods used in the reagents and water in the absence of other specified requirements, refer to analytically pure reagents and GB/T 6682-2008 in
Three water regulations. Test with the standard titration solution, impurity standard solution, preparations and products, did not indicate when the other requirements, according
HG/T 3696.1, HG/T 3696.2, the provisions of HG/T 3696.3 of preparation.
A.3 Identification Test
A.3.1 Reagents and materials
A.3.1.1 sodium hydroxide solution. 40 g/L and 100 g/L.
A.3.1.2 barium chloride solution. 50 g/L.
A.3.1.3 hydrochloric acid solution. 14.
A.3.1.4 mercurous nitrate test paper. filter paper immersed in 50 g/L mercury nitrate solution, dry out.
A.3.1.5 litmus paper.
A.3.2 Analysis step
A.3.2.1 Identification of aluminum
Take the test solution, adding sodium hydroxide solution, which occurred in a white gelatinous precipitate. The precipitate dissolves in an excess of sodium hydroxide solution.
A.3.2.2 Identification sulfate
Take a sample solution, plus barium chloride solution, which occurred in a white precipitate. Hydrochloric acid solution was precipitated insoluble.
A.3.2.3 Identification of salt
Take the sample solution on the surface of the dish, add an amount of 100 g/L sodium hydroxide solution, and then affixed to the cover of moist red litmus paper table
Side dish can be observed litmus paper blue.
A.4 Determination of ammonium aluminum sulfate
A.4.1 Method summary
In acid medium, EDTA and aluminum complexes with lead nitrate back titration of excess EDTA, to determine the aluminum-containing ammonium sulfate
the amount.
A.4.2 Reagents and materials
A.4.2.1 hydrochloric acid solution. 14.
A.4.2.2 ammonia solution. 11.
A.4.2.3 acetic acid - sodium acetate buffer solution. pH≈6.
A.4.2.4 disodium EDTA standard titration solution. c (EDTA) = 0.05 mol/L.
A.4.2.5 lead nitrate standard titration solution. c [Pb (NO3) 2] = 0.05 mol/L.
A.4.2.6 Congo red.
A.4.2.7 xylenol orange indicator solution. 2 g/L.
A.4.3 Analysis step
Weigh about 5 g Press A.5.2 milled and dried samples, accurate to 0.0002g, placed in a 150 mL beaker, add 80 mL of water, heating
Dissolved after cooling transferred to 250 mL volumetric flask, add 10 drops of dilute hydrochloric acid solution, washed with water to the mark (when turbidity can be filtered and discarded early
Beginning filtrate).
Pipette with a pipette 25.00 mL of test solution, placed in 250 mL conical flask, then added 50 mL pipette disodium edetate
Standard Solution. Place a small Congo red, then adjusted with ammonia solution paper purple (pH≈6), add 15 mL of acetic acid
Sodium acetate buffer solution, boiled for 3 min. After cooling, add 3 drops to 4 drops of xylenol orange indicator solution, titration with lead nitrate standard solution titration to orange
As the end point.
While doing the blank test.
In addition to the blank test without the sample, the addition of reagents and other operations of the kind and amount (other than the standard titration solution) with the same Test.
A.4.4 Calculation Results
Ammonium aluminum sulfate content of twelve water ammonium aluminum sulfate [AlNH4 (SO4) 2 · 12H2O] mass fraction w1 and its value is expressed in%, according to the formula
(A.1) Calculated.
() []
() 0250/25
1 × - = m
cMVVw (A.1)
Where.
c - accurate lead nitrate standard titration solution concentration value in units of moles per liter (mol/L);
V0 - Numerical lead nitrate standard titration blank test solution titration solution consumed volume in milliliters (mL);
V - Value lead nitrate standard solution titration titration solution consumed volume in milliliters (mL);
m - the value of the sample mass, in grams (g);
M - Numerical ammonium aluminum sulfate [AlNH4 (SO4) 2 · 12H2O] molar mass in grams per mole (g/mol) (M = 453.08).
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 Moisture
A.5.1 Instruments and Equipment
A.5.1.1 weighing bottle. Φ50 mm × 30 mm.
A.5.1.2 Test sieves. R40/3 series, Φ200 mm × 50 mm/355 μm, Φ200 mm × 50 mm/250 μm.
A.5.2 Analysis step
With constant mass has been weighing bottle weighing about 1g ground and through a pore size of 355μm by 250μm test sieve and not test sieve samples, fine
Indeed to 0.000 2g, spread evenly, into the silica gel drier, and dried to a constant mass.
A.5.3 Calculation Results
Moisture mass fraction w2 and its value is expressed in%, according to formula (A.2) Calculated.
012 × - = m
mmw (A.2)
Where.
m-- sample mass before drying value in units of grams (g);
m1-- sample mass after drying value in units of 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 0.05%.
A.6 Determination of insoluble matter
A.6.1 Instruments and Equipment
A.6.1.1 crucible filter. filter plate pore size 5 μm ~ 15 μm.
A.6.1.2 electric oven.
A.6.2 Analysis step
Approximately 20 g sample was weighed after grinding, accurate to 0.01g, placed 250 mL beaker, add 150 mL of boiling water, stirring to dissolve. Used by 105 ℃
110 ℃ drying to a constant mass to sintered glass crucible was filtered, then the residue was washed with boiling water until the filtrate was free of sulfate (with 10 g/L barium chloride solution
an examination). The crucible at 105 ℃ ~ 110 ℃ drying to constant mass.
A.6.3 Calculation Results
Water-insoluble mass fraction w3 and its value is expressed in%, according to formula (A.3) Calculated.
0123 × - = m
mmw (A.3)
Where.
m1 - sand Numerical glass crucible mass in grams (g);
m2 - mass of the glass sand crucible with water insoluble after drying value in units of grams (g);
m - the value of the 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 0.02%.
A.7 Determination of Arsenic
A.7.1 Reagents and materials
With GB/T 5009.76-2003 of Chapter 9.
A.7.2 Instruments and Equipment
With GB/T 5009.76-2003 Chapter 10.
A.7.3 Analysis step
Weigh 1.00 g ± 0.01 g sample is placed in a given arsenic jar, add 50 mL of water, shake well. Added 5 mL of hydrochloric acid, 1 g iodine
Potassium and 2 mL stannous solution, shake for 5 min, add 3 g of arsenic-free zinc, has been installed immediately lead acetate cotton and mercuric bromide test
Paper glass tube plugged onto the jar in a dark place 1 h. Remove with standard Gutzeit comparing pigmentation of samples are not deeper than the standard
Stain.
Limited preparation of standard solutions. The pipette 2 mL arsenic standard solution [1mL solution containing arsenic (As) 0.001 mg], put arsenic given the wide
Jar, and treated in the same sample at the same time.
A.8 Determination of heavy metals (Pb) of
A.8.1 Reagents and materials
A.8.1.1 with GB/T 5009.74-2003 of Chapter 3.
A.8.1.2 Lead standard solution. 1 mL solution containing lead (Pb) 0.01 mg;
Preparation. Pipette Pipette 1.00mL lead standard solution according to HG/T 3696.2 prepared, placed in 100 mL volumetric flask, add (1199)
Nitric acid solution to the mark.
A.8.2 Analysis step
Weigh 5.00 sample milled g ± 0.01 g, is placed 100 mL beaker, dissolved in water and transferred to 100 mL volumetric flask with water
Diluted to the mark, shake, dry filter, discard the filtrate prior to 20mL. Pipette 20.00 mL filtrate in 50 mL colorimetric tube, the following according to GB/T
5009.74-2003 specified in Chapter 6 were measured.
Preparation of standard colorimetric solution. pipette Pipette 1.00 mL of lead standard solution was placed in colorimetric tube, and treated in the same sample at the same time.
A.9 Determination of Lead
A.9.1 Reagents and materials
With GB/T 5009.75-2003 of Chapter 3.
A.9.2 Instruments and Equipment
Spectrophotometer. with 1 cm absorption cell.
A.9.3 Analysis step
Weigh 1.00 g ± 0.01 g sample, add appropriate amount of water to dissolve as the test solution.
Pipette 1.00 mL of lead standard solution (A.8.1.2) as a standard, following in GB/T 5009.75-2003 of 6.1.
Determination of fluoride A.10
A.10.1 reagents and materials
With HG 2927-1999 4.5.2.
A.10.2 instruments and equipment
With HG 2927-1999 4.5.3.
A.10.3 Analysis steps
It weighs about 2 g samples, accurate to 0.001g, add a little water to dissolve. The following HG 2927-1999 in accordance with the provisions of 4.5.4 was measured.
Standard colorimetric solution is pipetted 6.00 mL of fluoride standard solution [1mL solution of fluorine (F) 0.01mg], and the same test solution at the same time
Management.
A.11 Determination of Selenium
A.11.1 reagents and materials
A.11.1.1 hydrochloric acid solution. c (HCl) = 4 mol/L.
A.11.1.2 ammonium hydroxide solution. 12.
A.11.1.3 hydroxylamine hydrochloride.
A.11.1.4 cyclohexane.
A.11.1.5 selenium standard solution. 1 mL solution containing selenium (Se) 0.001 mg.
Pipette 1.00 mL of selenium standard solution according to HG/T 3696.2 prepared, placed in 1000 mL volumetric flask, dilute to the mark, shake.
A.11.1.6 2, 3- diaminonaphthalene solution.
Weigh 0.100 g 2, 3- diaminonaphthalene and 0.500 g of hydroxylamine hydrochloride, was dissolved in 100 mL0.1 mol L hydrochloric acid solution/medium.
A.11.2 instruments and equipment
Spectrophotometer. with a 1cm cuvette.
A.11.3 Analysis steps
Preparation of standard solutions A.11.3.1
Pipette Pipette 6.00 mL of selenium standard solution, placed in a 150 mL beaker, add 25 mL hydrochloric acid solution.
A.11.3.2 prepared test solution
Weigh 0.20g ± 0.01g sample was placed in a 150 mL beaker, add 25 mL hydrochloric acid solution.
A.11.3.3 Determination
Respectively to the two solutions add 5 mL of ammonium hydroxide solution and then the solution was adjusted with ammonium hydroxide to a pH of the solution (2.0 ±
0.2), diluted with water to 60 mL, with 10 mL of water was transferred to a separatory funnel, add 10 mL of water, plus 0.2 g of hydroxylamine hydrochloride, shake to dissolve,
Immediately added 5.0 mL2, 3- diaminonaphthalene was added. Stoppered shake for 10 min at room temperature. Add 5.0 mL of cyclohexane, forced shake 2 min,
The layers were separated. The aqueous phase was removed, centrifuged to remove traces of water, measured using a 1cm cuvette for each extract absorbance at 380 nm at trial
Absorbance of test solution should not be greater than the absorbance of the standard solution.
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