GB 1886.44-2016 English PDF

Delivery: 2 working-hours manually (Sales@ChineseStandard.net)
Need delivered in 3-second? USA-Site: GB 1886.44-2016
Get Quotation: Click GB 1886.44-2016 (Self-service in 1-minute)
Historical versions (Master-website): GB 1886.44-2016
Preview True-PDF (Reload/Scroll-down if blank)

GB 1886.44-2016: Food additive -- Sodium ascorbate
GB 1886.44-2016
NATIONAL STANDARD OF THE
PEOPLE?€?S REPUBLIC OF CHINA
GB/T 1886.44-2016
National Food Safety Standard - Food Additives
- Sodium Ascorbate
ISSUED ON: AUGUST 31, 2016
IMPLEMENTED ON: JANUARY 01, 2017
Issued by: National Health and Family Planning Commission of the
People's Republic of China
Table of Contents
Foreword ... 3??
1 Scope ... 4??
2 Molecular formula, structural formula and relative molecular mass ... 4??
3 Technical requirements ... 4??
Annex A Inspection methods ... 6??
National Food Safety Standard - Food Additives -
Sodium Ascorbate
1 Scope
This Standard is applicable to the food additive, sodium ascorbate, that is
prepared with ascorbic acid and sodium salt as raw materials.
2 Molecular formula, structural formula and relative
molecular mass
2.1 Molecular formula
C6H7NaO6
2.2 Structural formula
2.3 Relative molecular mass
198.11 (according to the international relative mass of 2007)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall meet the requirements of Table 1.
Table 1 -- Sensory requirements
Item Requirement Inspection method
Color White to light yellow Take an appropriate amount of specimen and place it in a
clean, dry white porcelain dish. Observe its color and state
under natural light. State Crystalline solid
Annex A
Inspection methods
A.1 General
Unless otherwise specified, the reagents and water used in this Standard refer
to analytically pure reagents and grade three water specified in GB/T 6682. The
standard titration solution used in the test, the standard solution for the
determination of impurities, preparations and products, unless otherwise
specified, are prepared in accordance with the provisions of GB/T 601, GB/T
602 and GB/T 603. When the solution used in the test does not indicate which
solvent is used for preparation, it refers to the aqueous solution.
A.2 Identification test
A.2.1 Solubility
1g of specimen can be dissolved in 2mL of water.
A.2.2 Identification
A.2.2.1 Method summary
The ascorbic acid part in the specimen has a dienol-based structure, has strong
reducing properties, and has the property of carbohydrates.
A.2.2.2 Reagents and materials
A.2.2.2.1 Activated carbon.
A.2.2.2.2 Pyrrole.
A.2.2.2.3 Hydrochloric acid.
A.2.2.2.4 Alkaline tartrate copper acid solution.
A.2.2.2.5 Hydrochloric acid solution: 9???1000.
A.2.2.2.6 Trichloroacetic acid solution: Take 6g of trichloroacetic acid. Add 25ml
of trichloromethane to dissolve. Add 0.5ml of 30% hydrogen peroxide solution.
Shake well to obtain.
A.2.2.2.7 Potassium carbonate solution: 150g/L.
A.2.2.2.8 Potassium pyroantimonate solution: Take 2g of potassium
pyroantimonate. Dissolve it in 85mL of hot water. Quickly cool. Add 10mL of
A.3.2.3 Sulfuric acid solution: Take 57mL of sulfuric acid. Slowly pour into the
right amount of water. Cool to room temperature. Add water to dilute to 1000mL.
Shake well.
A.3.2.4 Iodine standard titration solution: .
A.3.2.5 Starch indicator solution: 10g/L.
A.3.3 Analysis steps
Weigh about 400mg of the specimen that is dried by phosphorus pentoxide for
24h, to the nearest of 0.0002g. Use 100mL of solution that is mixed by newly
boiled cold distilled water and 25mL of sulfuric acid solution to dissolve.
Immediately use 0.1mol/L iodine standard titration solution to titrate. Near the
end point, add 3mL of the starch indicator solution to the solution till it shows
blue and shall not fade within 30s.
A.3.4 Result calculation
The mass fraction of sodium ascorbate (C6H7NaO6) content (on a dry basis),
w1, is calculated according to formula (A.1):
Where,
V - Volume of iodine standard titration solution consumed by specimen, in
milliliters (mL);
1000 - Conversion factor;
c - Concentration of iodine standard titration solution, in Molar per liter (mol/L);
M - Molar mass of sodium ascorbate, in grams per Molar (g/mol),
m1 - Specimen mass, in grams (g).
The relative deviation of two parallel determination results in this method shall
not exceed 0.3%.
A.4 Determination of dry weight loss