GB 1886.210-2016 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 1886.210-2016 | English | 190 |
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National Food Safety Standard -- Food Additives -- Propionic acid
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GB 1886.210-2016: National Food Safety Standard -- Food Additives -- Propionic acid---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB1886.210-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National food safety standard - Food additives - Propionic
acid
ISSUED ON: AUGUST 31, 2016
IMPLEMENTED ON: JANUARY 01, 2017
Issued by: National Health and Family Planning Commission of PRC
Table of Contents
1 Scope ... 3
2 Chemical name, molecular formula, structural formula, relative molecular mass ... 3
3 Technical requirements ... 3
Appendix A Testing method ... 5
National food safety standard - Food additives - Propionic
acid
1 Scope
This standard applies to propionic acid, which is refined by industrial synthesis.
2 Chemical name, molecular formula, structural formula,
relative molecular mass
2.1 Chemical name
Propionic acid
2.2 Molecular formula
C3H6O2
2.3 Structural formula
2.4 Relative molecular mass
74.08 (according to 2013 international relative atomic mass)
3 Technical requirements
3.1 Sensory requirements
Sensory requirements shall comply with Table 1.
Appendix A
Testing method
A.1 Warning
Some reagents used in the test methods of this standard are toxic or corrosive.
Appropriate safety and protective measures shall be taken during operation.
A.2 General provisions
Unless other requirements are specified, the reagents and water used in this standard
refer to analytically pure reagents and grade-3 water specified in GB/T 6682. The
standard solutions, standard solutions for impurity determination, preparations and
products used in the test shall be prepared, in accordance with the provisions of GB/T
601, GB/T 602, GB/T 603, unless other requirements are indicated. The solutions used
in the test refer to aqueous solutions, unless the solvent used to prepare them is specified.
A.3 Identification test
Take 1 mL of specimen. Add 3 drops of sulfuric acid and 1 mL of ethanol. Heat it. It
shall have an aromatic smell.
A.4 Determination of propionic acid
A.4.1 Reagents and materials
A.4.1.1 Phenolphthalein indicator solution: 1% ethanol solution.
A.4.1.2 Standard titration solution of sodium hydroxide: c (NaOH) = 0.5 mol/L.
A.4.2 Analytical procedures
Weigh 1.5 g of specimen, accurate to 0.0002 g. Put it into a 250 mL conical flask. Add
100 mL of newly boiled and cooled water. Add 2 drops of phenolphthalein indicator.
Use sodium hydroxide standard titration solution to titrate, until red color does not fade
for 30 s, which is taken as the end point.
A.4.3 Result calculation
The mass fraction w1 of propionic acid content is calculated according to formula (A.1):
Where:
V0 - The volume of iodine standard titration solution, which is consumed during the
blank test, in milliliters (mL);
V1 - The volume of iodine standard titration solution, which is consumed when
measuring the aldehyde content in the specimen, in milliliters (mL);
M - The molar mass of propionaldehyde, in grams per mole (g/mol) [M (C3H6O) =
58.08];
m - The mass of the specimen, in grams (g);
1000 - Conversion factor;
2 - Molar conversion factor.
The test results are based on the arithmetic mean of parallel measurement results
(retaining 3 decimal places). The absolute difference between two independent
determination results, which are obtained under repeatability conditions, is not greater
than 10% of the arithmetic mean.
A.6 Determination of easy oxidants (calculated as formic acid)
A.6.1 Reagents and materials
A.6.1.1 Sodium hydroxide.
A.6.1.2 Bromine.
A.6.1.3 Sodium acetate solution: 200 g/L.
A.6.1.4 Potassium iodide solution: 250 g/L.
A.6.1.5 Hydrochloric acid.
A.6.1.6 Sodium thiosulfate standard titration solution: c (Na2S2O3) = 0.1 mol/L.
A.6.2 Analytical procedures
Dissolve 15 g of sodium hydroxide in 50 mL water. Cool it. Add 6 mL of bromine. Stir
thoroughly to dissolve completely. Use water to dilute to 2000 mL. Take 25.0 mL of
this solution and place it in a 250 mL stoppered conical flask, which contains 100 mL
of water. Add 10 mL of sodium acetate solution and 10 g of specimen (accurate to 0.001
g). Leave it for 15 minutes. Add 5 mL of potassium iodide and 10 mL of hydrochloric
acid. Use sodium thiosulfate standard titration solution to make titration, until the brown
color disappears. Do a blank test at the same time.
A.6.3 Result calculation
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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