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GB 30613-2014: National Food Safety Standard -- Food Additives -- Diammonium Hydrogen Phosphate
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| GB 30613-2014 | English | 279 |
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National Food Safety Standard -- Food Additives -- Diammonium Hydrogen Phosphate
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GB 30613-2014
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Basic data
| Standard ID | GB 30613-2014 (GB30613-2014) |
| Description (Translated English) | National Food Safety Standard -- Food Additives -- Diammonium Hydrogen Phosphate |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | C53 |
| Classification of International Standard | 67.020 |
| Word Count Estimation | 7,787 |
| Date of Issue | 4/29/2014 |
| Date of Implementation | 11/1/2014 |
| Regulation (derived from) | National Health and Family Planning Commission Bulletin No. 7, 2014 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This Standard specifies the food additives in food additives hydrogen phosphate phosphoric acid and ammonia as raw materials to produce the second mortgage. |
GB 30613-2014: National Food Safety Standard -- Food Additives -- Diammonium Hydrogen Phosphate
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Food additives diammonium phosphate)
National Standards of People's Republic of China
National standards for food safety
Food Additive Diammonium Phosphate
Released.2014-04-29
2014-11-01 implementation
People's Republic of China
National Health and Family Planning Commission released
National standards for food safety
Food Additive Diammonium Phosphate
1 Scope
This standard applies to food additives phosphoric acid and liquid ammonia as raw material production of food additives diammonium phosphate.
2 molecular formula and relative atomic weight
2.1 Molecular formula
(NH4) 2HPO4.
2.2 Relative molecular mass
132.03 (according to.2011 international relative atomic mass).
3 technical requirements
3.1 sensory requirements
Sensory requirements shall comply with the requirements of Table 1.
Table 1 sensory requirements
The project requires a test method
Color white
State crystals, crystal powder or particles
Take the appropriate amount of sample in a 50mL beaker and look under natural light
Color and state
3.2 Physical and chemical indicators
Physical and chemical indicators should be consistent with the provisions of Table 2.
Table 2 Physical and chemical indicators
Item Index Test Method
Diammonium phosphate [(NH4) 2HPO4] Content (mass fraction) /% 96.0 to 102.0 Appendix A A.4
pH (10 g/L aqueous solution) 7.6 to 8.2 A.5
Lead (Pb)/(mg/kg) ≤ 4 A.6
Fluorine (F)/(mg/kg) ≤ 10 GB/T 5009.18
Heavy metals (Pb)/(mg/kg) ≤ 10 GB/T 5009.74
Inorganic arsenic (in As)/(mg/kg) ≤ 3 GB 5009.11 or GB 5009.76
Appendix A
Testing method
A.1 Warning
Some of the reagents used in the test methods of this standard are toxic or corrosive and should be operated with appropriate safety and protective measures.
If necessary, in the fume hood. Such as splashing on the skin should be immediately rinse with water, severe should be treated immediately. Use heavy drugs, should be strict
In accordance with the relevant provisions of the management; use should avoid inhalation or contact with the skin, if necessary, should be carried out in the fume hood. For the exposed parts of injury
Mouth staff can not touch.
A.2 General provisions
The reagents and water used in this standard refer to the pure reagent and the tertiary water specified in GB/T 6682 when no other requirements are specified. test
The standard solutions, preparations and articles used for the determination of impurity used in the test shall be classified according to GB/T 602 and GB/T 603 when no other requirements are specified
Custom preparation The solution used refers to an aqueous solution when it is not specified with any solvent formulation.
A.3 Identification test
A.3.1 Reagents and materials
A.3.1.1 Nitric acid solution. 1 8.
A.3.1.2 Ammonia solution. 1 1.
A.3.1.3 Sodium hydroxide solution. 40 g/L.
A.3.1.4 Silver nitrate solution. 17 g/L.
A.3.1.5 red litmus paper.
A.3.2 Identification method
A.3.2.1 Identification of phosphate ions
Approximately 1.0 g of the sample was weighed and dissolved in 20 mL of water and adjusted to neutral with nitric acid solution. Adding silver nitrate solution, can generate yellow precipitate,
The precipitate is dissolved in an aqueous ammonia solution or a nitric acid solution.
A.3.2.2 Ammonium ion identification
Weigh about 1.0g sample, dissolved in 20mL water, add sodium hydroxide solution, the release of ammonia can make the wet red litmus paper
Turn blue. Heating can promote decomposition.
Determination of the content of diammonium phosphate [(NH4) 2HPO4]
A.4.1 Methodological Summary
In the acidic conditions, quinolybdate as a precipitant to the sample solution of phosphate all the formation of phosphomolybdic acid quinoline precipitation, precipitation through
Filter, drying, weighing to determine the content of diammonium phosphate in the sample.
A.4.2 Reagents and materials
A.4.2.1 Nitric acid solution. 1 1.
A.4.2.2 Quercetrone solution. 70g sodium molybdate was weighed and dissolved in 150mL water as solution 1. Weigh 60g citric acid and dissolve
150 mL of water and 85 mL of nitric acid, as a solution 2. The solution 1 was slowly added to solution 2 while stirring to give solution 3. in
35 mL of nitric acid and 100 mL of water was added 5 mL of quinoline as solution 4. The solution 4 was added to solution 3 and stirred evenly
24h, filter, the filtrate by adding 280mL of acetone, diluted with water to 1000mL, mix.
WARNING. This solution should be stored in a polyethylene bottle. This solution contains acetone and should not be used near flames. If you want to heat or boil during operation
Should be carried out in a fume hood.
A.4.3 Instruments and equipment
A.4.3.1 Glass sand core crucible. pore size 5μm ~ 15μm.
A.4.3.2 Electric thermostat oven. The temperature can be controlled to 180 ℃ ± 2 ℃.
A.4.4 Analysis steps
A.4.4.1 Preparation of sample solution
Weigh about 1g of sample, accurate to 0.0002g. Placed in a 100mL beaker, add a small amount of water to dissolve. Into a 250mL volumetric flask,
Diluted with water to the mark, shake. Dry filter, discard the initial 20mL filtrate, keep the filtrate as a sample solution.
A.4.4.2 Determination
Transfer the 10 mL sample solution with a pipette and place in a 300 mL beaker. Add 10mL nitric acid solution, add water to the total volume of about
100mL, covered with a surface dish, heated in a water bath to the beaker material to 75 ℃ ± 5 ℃, adding 50mL quinolhenone solution (in the pass
Fume hood), insulation 30s (in the addition of reagents and heating process, shall not use the fire, not stirring, so as not to coagulate into blocks). Cooling in
Stir the mixing process 3 times to 4 times. The precipitate was pumped in a glass sand core crucible which was dried at 180 ° C ± 2 ° C to a constant mass.
The supernatant was filtered and the precipitate was washed 6 times with a decanter, about 30 mL each time, and finally the precipitate was transferred to a glass sand core crucible
In the filter, then washed with water precipitation 4 times. Place the glass sand core crucible together with the precipitate in an electrothermal oven, starting from the temperature stability
, And dried at 180 ° C ± 2 ° C for 45 min. After taking out a little cold, place it in a desiccator and cool to room temperature and weigh.
At the same time to do blank test, blank test in addition to no sample, the other types of reagents added and the sample solution exactly the same, and with the test
The same solution is treated.
A.4.5 Calculation of results
The mass fraction w1 of the content of diammonium phosphate [(NH4) 2HPO4] is calculated according to formula (A.1)
w1 =
(m1-m2) x 0.05966 x 250
m × 10 ×
100% (A.1)
Where.
m1 - the mass of quinoline phosphomolybdate precipitate produced in the sample solution in grams (g);
m2 --- blank sample solution to produce phosphomolybdic acid quinoline precipitation quality, in grams (g);
0.05966 --- molybdenum phosphomolybdate converted to the coefficient of diammonium phosphate;
250 --- volume of the volume of the bottle, in milliliters (mL);
m --- the quality of the sample, in grams (g);
10 --- Remove the volume of the sample solution in milliliters (mL).
The results of the test are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The value is not greater than 0.3%.
A.5 pH (10 g/L aqueous solution)
A.5.1 Reagents and materials
Water without carbon dioxide.
A.5.2 Instruments and equipment
Acidity meter. accuracy 0.02pH.
A.5.3 Analysis steps
A sample of 1.00 g ± 0.01 g was weighed and placed in a 150 mL beaker and 100 mL of carbon dioxide-free water was added. With the school has been
A good acidity meter was measured.
The results of the test are based on the arithmetic mean of the parallel measurement results. The absolute difference between the two independent determinations obtained under repeatability conditions
The value is not greater than 0.1.
A.6 Determination of lead (Pb)
A.6.1 Reagents and materials
A.6.1.1 Hydrochloric acid.
A.6.1.2 Nitric acid.
A.6.1.3 Trichloromethane.
A.6.1.4 Sodium hydroxide solution. 250 g/L.
A.6.1.5 Ammonium pyrrolidine dithiocarbamate (APDC) solution. 20 g/L, dissolve 2 g of ammonium pyrrolidine dithiocarbamate (APDC)
In 100 mL of water. Filter before use. The solution is now used.
A.6.1.6 lead (Pb) standard solution. 0.005mg/mL, with a pipette to remove 5mL GB/T 602 prepared by the lead standard solution, placed in
100mL volumetric flask, diluted with water to the mark, shake. The solution is now used.
A.6.1.7 Precision pH test paper. 0.5 ~ 5.0.
A.6.1.8 Water. in line with GB/T 6682-2008 in the provisions of secondary water.
A.6.2 Instruments and equipment
A.6.2.1 Dispensing funnel. 250 mL.
A.6.2.2 Atomic Absorption Spectrophotometer. With lead hollow cathode lamp.
A.6.3 Analysis steps
A.6.3.1 Preparation of sample solution
Weigh 5.00g ± 0.01g sample, placed in 150mL beaker, add 30mL water dissolved, add 1mL hydrochloric acid. Heated to boil a bit
The mixture was cooled with water and diluted to about 100 mL. The pH of the solution was adjusted to 1.0 to 1.5 (measured with a precision pH test paper) with sodium hydroxide solution. will
The solution was transferred to a 250 mL separatory funnel and diluted to about.200 mL with water. Plus 2 mL of ammonium pyrrolidine dithiocarbamate
(APDC) solution, mix well. The extracts were extracted twice with 20 mL of chloroform and the extracts were collected in a 50 mL beaker and evaporated to dryness
(This operation should be carried out in a fume hood), add 3mL nitric acid, evaporated in the bath to near dry. Add 0.5 mL of nitric acid and 10 mL of water and steam
Sent to the solution volume of about 3mL ~ 5mL. Transfer to 10mL volumetric flask, dilute to the mark with water, shake.
A.6.3.2 Preparation of standard solutions
Remove the 4.00 mL lead standard solution in a 150 mL beaker. The following operation with A.6.3.1 from the "add 30mL water dissolved"
Start to "transfer to 10mL volumetric flask, diluted with water to the mark, shake" so far.
A.6.3.3 Determination
At 283.3nm, the air-acetylene flame is used to measure the absorbance by water, and the absorbance of the sample solution should not be higher than that of the standard solution
Of the absorbance.
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