GB 1886.250-2016 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 1886.250-2016 | English | 120 |
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National food safety standard - Food additives - Sodium Phytate
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GB 1886.250-2016: National food safety standard - Food additives - Sodium Phytate---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/GB1886.250-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard - Food Additives -
Sodium Phytate
Issued on. AUGUST 31, 2016
Implemented on. JANUARY 1, 2017
Issued by. National Health and Family Planning Commission of the
People’s Republic of China
Table of Contents
1 Scope... 3
2 Molecular Formula, Structural Formula and Relative Molecular Mass... 3
3 Technical Requirements... 3
Appendix A Inspection Method... 5
National Food Safety Standard - Food Additives -
Sodium Phytate
1 Scope
This Standard is applicable to food additive sodium phytate, which is made from rise
bran and corn germ as the raw materials, and through extraction, purification,
crystallization separation and drying.
2 Molecular Formula, Structural Formula and Relative
Molecular Mass
2.1 Molecular Formula
C6H6O24P6Na12
2.2 Structural Formula
2.3 Relative Molecular Mass
923.8012 (in accordance with 2013 international relative atomic mass)
3 Technical Requirements
3.1 Sensory Requirements
The sensory requirements shall comply with the stipulations of Table 1.
Appendix A
Inspection Method
A.1 General Rules
When other requirements are not indicated, the reagents and water used in this
Standard refer to analytically pure reagents and Grade-3 water specified in GB/T 6682.
When other requirements are not indicated, the standard solutions, preparations and
products used for impurity determination shall be prepared in accordance with the
stipulations of GB/T 602 and GB/T 603.When it is not specified which solvent is used
for the preparation, the solutions used in the test refer to aqueous solutions.
A.2 Identification Test
A.2.1 Reagents and materials
A.2.2 Identification method
Take a small amount of 1% specimen solution; use nitric acid solution to neutralize it;
add a few drops of calcium chloride solution to generate white precipitate.
Take a small amount of 1% specimen solution; add 1 mL of sulfuric acid; heat it up to
reach complete carbonization. Then, dropwise add hydrogen peroxide, until it turns
light yellow and translucent; add ammonium molybdate solution to develop yellow.
A.3 Determination of Sodium Phytate Content
A.3.2 Reagents and materials
A.3.2.1 Nitric acid.
A.3.2.2 Perchloric acid.
A.3.2.3 Nitric acid solution. 1 + 1.
A.3.2.4 Quin molybdenum ketone reagent. weigh-take 70 g of sodium molybdate, add
150 mL of water to dissolve it, which is solution I; weigh-take 60 g of citric acid, add
150 mL of water and 85 mL of nitric acid to dissolve it, then, under stirring, pour solution
I into it, which is solution II. Measure-take 100 mL of water, add 35 mL of nitric acid and
5 mL of quinoline; slowly pour the mixed solution into solution II, let it stand for 24 h,
then, filter it into a 1 L volumetric flask; add 280 mL of acetone, use water to dilute to
the scale; after mixing it up, store it in a plastic bottle; it shall be valid for half a year.
A.3.2.5 No. 5 sand core funnel.
A.3.4 Result calculation
The mass fraction w1 of sodium phytate shall be calculated in accordance with Formula
(A.1).
A.4 Determination of Inorganic Phosphorus
A.4.1 Method summary
Under acidic conditions, add orthophosphate in the sodium phytate solution of ferric
chloride solution to generate yellow phosphorus vanadium molybdate complex with
vanadium molybdate. Use a spectrophotometer to measure its absorbance value at
420 nm. In accordance with the standard curve, calculate the inorganic phosphorus
content in the sample.
A.4.2 Reagents and materials
A.4.2.1 Ammonium vanadium molybdate solution. weigh-take 40 g of ammonium
molybdate [(NH4)6Mo7O24 4H2O], dissolve it in 400 mL of water to obtain solution A.
Weigh-take 1.0 g of ammonium metavanadate (NH4VO3), dissolve it in a mixed solvent
of 300 mL of water and 80 mL of concentrated sulfuric acid to obtain solution B. Add
solution A to solution B; use reagent water to dilute it to 1 L.
A.4.2.2 Ferric chloride solution. 10 g/L.
A.4.3 Instrument and equipment
Spectrophotometer
A.4.4 Analytical procedures
A.4.4.1 Determination
Weigh-take about 1 g of the specimen, accurate to 0.001 g; add 20 mL of water to
dissolve it. Add 2 mL of ferric chloride solution; add water to reach a constant volume
of 50 mL. At 10 °C and 7,500 r/min, centrifuge it for 5 min. Take 5 mL of the supernatant;
add 15 mL of water and 10 mL of ammonium vanadium molybdate solution, shake it
well. Let it stand for 2 min, then, at 420 nm, measure its absorbance.
A.5 Determination of Chloride
A.5.1 Method summary
Under acidic conditions, the chloride ions in the sodium phytate solution and the silver
nitrate solution generate white silver nitrate precipitate. Use the visual inspection
method to compare the turbidity with the standard solution.
A.5.2 Reagents and materials
A.5.2.1 Nitric acid solution. 1 + 4.
A.5.2.2 Silver nitrate solution. 0.1 mol/L.
A.5.2.3 Chloride standard solution. 0.1 mg/mL.
A.6 Determination of Sulfate
A.6.1 Method summary
Under acidic conditions, the sulfate ions in the sodium phytate solution and the barium
chloride solution generate barium sulfate precipitate. Use the visual inspection method
to compare the turbidity with the standard solution.
A.6.2 Reagents and materials
A.6.2.1 Nitric acid solution. 1 + 3.
A.6.2.2 Sulfate standard solution. 0.1 mg/mL.
A.6.3 Analytical procedures
Weigh-take 1.0 g of the specimen (accurate to 0.01 g); place it in a 25 mL colorimetric
tube. Add 20 mL of water, then, use nitric acid solution to neutralize it to pH = 7; the
remaining shall be carried out in accordance with the stipulations of GB/T 9728.Take
1.0 mL of sulfate standard solution to a 25 mL colorimetric tube; add 20 mL of water;
the rest of the steps are the same as the treatment of the specimen solution. Observe
the turbidity of the sample, which shall not be deeper than the standard solution.
A.7 Determination of Calcium Salt
A.7.1 Method summary
In acetic acid medium, trace calcium ions and oxalate ions generate suspension of
calcium oxalate, which is insoluble. Use the visual inspection method to compare the
turbidity with the standard solution.
A.7.2 Reagents and materials
A.7.2.1 Acetic acid solution.
A.7.3 Analytical procedures
Weigh-take 1.0 g of the specimen, accurate to 0.01 g; place it in a 25 mL colorimetric
tube. Add 10 mL of water; use nitric acid solution to neutralize it to pH = 7.Add 1 mL
of acetic acid and 5 mL of ammonium oxalate solution; use water to dilute to the scale;
let it stand for 10 min. Take 1.0 mL of calcium standard solution to a 25 mL colorimetric
tube; add 10 mL of water. The rest of the steps are the same as the treatment of the
specimen solution. Observe the turbidity of the sample, which shall not be deeper than
the standard solution.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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