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GB 1886.326-2021 English PDF (GB1886.326-2021)

GB 1886.326-2021 English PDF (GB1886.326-2021)

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GB 1886.326-2021: National food safety standard - Food additives - Calcium acid pyrophosphat

This Standard applies to the food additive calcium acid pyrophosphat that is made from the reaction, of which calcium oxide, calcium hydroxide and phosphoric acid (hot process or wet process) are used as raw materials.
GB 1886.326-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
National food safety standard - Food additives -
Calcium acid pyrophosphat
ISSUED ON: FEBRUARY 22, 2021
IMPLEMENTED ON: AUGUST 22, 2021
Issued by: National Health Commission of the People's Republic of
China;
State Administration for Market Regulation.
Table of Contents
1 Scope ... 3
2 Molecular formula and relative molecular mass ... 3
3 Technical requirements ... 3
Appendix A Inspection method ... 5
National food safety standard - Food additives -
Calcium acid pyrophosphat
1 Scope
This Standard applies to the food additive calcium acid pyrophosphat that is made from the reaction, of which calcium oxide, calcium hydroxide and
phosphoric acid (hot process or wet process) are used as raw materials. 2 Molecular formula and relative molecular mass
2.1 Molecular formula
CaH2P2O7
2.2 Relative molecular mass
216.04 (according to the international relative atomic mass in 2018)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall be in accordance with Table 1.
3.2 Physical and chemical indicators
Physical and chemical indicators should be in accordance with Table 2.
Table 2 ?€? Physical and chemical indicators
Appendix A
Inspection method
WARNING: Some reagents used in this test method are toxic or corrosive; the operator shall be careful. If it is splashed on the skin, use water to rinse it immediately. If it is serious, seek medical attention immediately. A.1 General Provisions
The reagents and water that are used in this Standard, when no other
requirements are specified, refer to analytical reagents and grade-III water which is specified in GB/T 6682. The standard solution, the standard solutions, preparations and products for impurity determination, which are used in the test, are all prepared in accordance with the provisions of GB/T 601, GB/T 602, and GB/T 603, when no other requirements are specified. The solution used in the test, if not indicated which solvent is used, refers to aqueous solution. A.2 Identification test
A.2.1 Reagents and materials
A.2.1.1 Nitric acid solution: 1+9.
A.2.1.2 Quinmolybdenone solution: Prepare according to HG/T 3696.3.
A.2.1.3 Ammonium oxalate solution: 33 g/L.
A.2.2 Identification method
A.2.2.1 Identification of calcium ions
Weigh about 0.1 g of the sample; add 20 mL of water; shake well and filter. Add 5 mL of ammonium oxalate solution to the filtrate, to form a white precipitate. A.2.2.2 Identification of pyrophosphate
Weigh about 0.1 g of the sample; dissolve it in 100 mL of nitric acid solution to obtain the sample solution; pipette 0.5 mL of the above solution and add into 30 mL of quinmolybdenone solution. Heat the remaining sample solution at 95??C for 10 min; then, take 0.5 mL of the sample solution from it and add into 30 mL of the quinmolybdenone solution. A yellow precipitate is immediately formed in the heated sample solution; no precipitate is formed if it is not heated. A.3 Determination of calcium acid pyrophosphat content
water to rinse the beaker and crucible twice. Place the crucible in another beaker; add 100 mL of water and 50 mL of sulfuric acid solution; heat to about 70 ??C; use potassium permanganate titration solution to titrate until the solution is pink and does not disappear within 30 s, which is the end of the titration. At the same time, do a blank test.
For the blank test, except that no sample is added, the other operations and the type and amount of added reagents (except for the standard titration solution) are the same as the determination test.
A.3.5 Result calculation
Calculate the mass fraction w1 of the calcium acid pyrophosphat content according to Formula (A.1).
Where:
c ?€? concentration of the potassium permanganate titration solution, in moles per liter (mol/L);
V1 ?€? volume of the potassium permanganate standard titration solution that is consumed in the titration of the sample solution, in milliliters (mL);
V2 ?€? volume of the potassium permanganate standard titration solution that is consumed in the titration of the blank solution, in milliliters (mL);
M ?€? molar mass of the calcium acid pyrophosphat, in grams per mole (g/mol) [M(1 2??? CaH2P2O7) = 108.02];
m ?€? sample mass, in grams (g).
1 000 ?€? volume conversion factor.
The test result is based on the arithmetic mean of the parallel determination results. The absolute difference between two independent determination results that are obtained under repeatability conditions is not more than 0.2%. A.4 Determination of loss on ignition
A.4.1 Reagents and materials
Sulfuric acid
A.4.2 Instruments and apparatuses

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