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GB 29208-2012 English PDF (GB29208-2012)

GB 29208-2012 English PDF (GB29208-2012)

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GB 29208-2012: National food safety standards -- Food additives -- Manganese sulfate

This Standard applies to food additives manganese sulfate which is made of materials pyrolusite, rhodochrosite or manganese metal.
GB 29208-2012
GB
National Standard
of the People's Republic of China
National Food Safety Standard
Food Additives Manganese Sulfate
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ISSUED ON. DECEMBER 25, 2012
IMPLEMENTED ON. JANUARY 25, 2005
Issued by. Ministry of Health of the PEOPLE Republic of China
Table of Contents
1 Scope ... 3
2 Chemical name, formula and relative molecular mass ... 3
3 Technical requirements ... 3
Appendix A ... 5
References and Original Chinese Documents ... 12
National Food Safety Standard
Food Additives Manganese Sulfate
1 Scope
This standard applies to food additives manganese sulfate which is made of materials pyrolusite, rhodochrosite or manganese metal.
2 Chemical name, formula and relative molecular mass
2.1 Chemical name
Hydrous manganese sulfate
2.2 Formula
MnS04 ?€? H2 0
2.3 Relative molecular mass
169.02 (according to international relative atomic mass in 2007)
3 Technical requirements
3.1 Sensory requirements
Shall comply with the requirements in Table 1.
Table 1 Sensory requirements
Item Requirements Test methods
Color Pale pink TAKE appropriate amount of sample and PLACE in a 50
mL beaker, OBSERVE the color and state under natural
light
State Granules or powder
3.2 Physical and chemical indicators
Shall comply with the requirements in Table 2.
Table 2 Physical and chemical indicators
Item Requirements Test methods
Contents of CMnSO?€?H2O, w/% 98.0-102.1 A.4 in Appendix A
Appendix A
Test Methods
A.1 Warning
Some reagents used in the test method are toxic or corrosive, appropriate protective and safety measures shall be taken in operation.
A.2 General Provisions
In the absence of other requirements specified, the reagent and water in this Standard generally refer to the analytical reagent and the tertiary water specified in GB/T 6682-2008. In the absence of other requirements specified, the standard titrate solution, the standard solution for determination of impurity, preparation and product shall be prepared according to the provisions of GB/T 601, GB/T 602 and GB/T 603. In the absence of using which solvent to prepare the solution, it defaults to be aqueous solution.
A.3 Discrimination Test
A.3.1 Reagent and Material
A.3.1.1 Ammonium sulfide.
A.3.1.2 Acetic acid.
A.3.1.3 Ammonia.
A.3.1.4 Ammonium acetate.
A.3.1.5 Barium chloride solution. 120 g/L.
A.3.1.6 Hydrochloric acid solution. 1+1.
A.3.1.7 lead acetate solution. 95 g/L.
A.3.2 Discrimination Methods
A.3.2.1 Discrimination of manganese ion
TAKE about 1g sample, DISSOLVE it in 10mL water, ADD ammonium
sulfide to produce light orange precipitate. This precipitate can be
dissolved in acetic acid.
A.4.2 Result calculation
CALCULATE the mass fraction w1 of the content of MnS04 ?€? H2O according
to the formula (A.1)
Where.
V -- The numerical value of the EDTA standard titration solution consumed by the titration sample solution. The unit is milliliters (mL)
V0 -- The numerical value of EDTA standard titration solution consumed by the titration blank sample solution. the unit is milliliters (mL)
c -- Definite numerical concentration value of EDTA standard titration solution, the unit is moles per liter (mol/L)
m -- The numerical value of the sample mass, the unit is g.
M -- The numerical value of the molar mass of manganese sulfate, (g/mol) [M (MnS04 ?€? H2O) =169.02J;
1 000----Conversion Factor
The experiment result is subject to the arithmetic mean value measured by parallel determination result, the absolute difference of two independent measurement results obtained under the repeatability conditions shall not be greater than 0.2%.
A.5 Determination of Pb
A.5.1 Reagents and materials
A.5.1.1 Chloroform.
A.5.1.2 Hydrochloric acid.
A.5.1.3 Nitric acid.
A.5.1.4 Sodium hydroxide solution. 250 g/L.
A.5.1.5 Ammonium pyrrolidine dithiocarbamate (APDC) solution. 20 g/L. Filter before using.
A.5.1.6 Lead (Pb) standard solution. 0.01 mg/ mL.
A.5.1.7 Water. comply with the provisions in GB/T 6682?€?2008 for
second-grade water.
calcination, the unit is gram (g);
m -- The numerical value of the sample?€?s mass.
The experiment result is subject to the arithmetic mean value measured by parallel determination result, the absolute difference of two independent measurement results obtained under the repeatability conditions shall not be greater than 0.1%.
References and Original Chinese Documents
[1] GB 29208-2012 National food safety standards - Food additives - Manganese sulfate.

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