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National food safety standard - Food additive - Sodium hexametaphosphate
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GB 1886.4-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard -
Food Additive - Sodium Hexametaphosphate
ISSUED ON: SEPTEMBER 11, 2020
IMPLEMENTED ON: MARCH 11, 2021
Issued by: National Health Commission of the People’s Republic of China;
State Administration for Market Regulation.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Technical Requirements ... 4
Appendix A Inspection Methods ... 6
National Food Safety Standard - Food Additive -
Sodium Hexametaphosphate
1 Scope
This Standard is applicable to food additive sodium hexametaphosphate, which is
generated by the melt polymerization reaction of sodium carbonate or sodium
hydroxide and food additive phosphoric acid (including phosphoric acid by wet
process).
2 Technical Requirements
2.1 Sensory Requirements
Sensory requirements shall comply with the stipulations of Table 1.
Table 1 -- Sensory Requirements
Item Requirements Inspection Methods
Color Colorless and transparent, or white Take an appropriate amount of specimen; place
it in a 50 mL beaker; under natural light, observe
its color and state
State Glassy flake, granule or powder
2.2 Physical and Chemical Indicators
The physical and chemical indicators shall comply with the stipulations of Table 2.
Appendix A
Inspection Methods
A.1 Warning
Some reagents used in the inspection methods of this Standard are toxic or corrosive,
so be careful when handling them! If they splash on the skin or eyes, immediately use
plenty of water for rinsing. In severe cases, medical treatment shall be immediately
sought. For the flammable products used in the tests, no open flame shall be used
during operation.
A.2 General Rules
Unless other requirements are indicated, the reagents and water used in this Standard
refer to analytically pure reagents and Grade-3 water specified in GB/T 6682. Unless
other requirements are indicated, the standard titration solutions, preparations and
products used in the tests are all prepared in accordance with GB/T 601, GB/T 602
and GB/T 603. When it is not specified which solvent is used for preparation, the used
solution refers to an aqueous solution.
A.3 Identification and Test
A.3.1 Reagents and materials
A.3.1.1 Hydrochloric acid.
A.3.1.2 Nitric acid solution: 1 + 7.
A.3.1.3 Silver nitrate solution: 17 g/L.
A.3.1.4 Sodium hydroxide solution: 40 g/L.
A.3.1.5 Platinum-wire ring.
A.3.2 Identification methods
A.3.2.1 Sodium ion
After using hydrochloric acid to wet the platinum-wire ring, burn it on colorless flame,
until it becomes colorless. Dip the specimen; burn it in colorless flame; the flame shall
be luminous yellow.
A.3.2.2 Phosphate
Weigh-take 0.1 g of specimen; place it in a 50 mL beaker. Add 5 mL of hot nitric acid
A.5.3.1 Sintered-glass filter crucible: the aperture of the filter plate is 5 μm ~ 15 μm.
A.5.3.2 Electrothermal constant-temperature drying oven: the temperature is
controlled at 180 °C ± 5 °C or 250 °C ± 10 °C.
A.5.4 Analytical procedures
Use a pipette to transfer-take 50 mL of the specimen solution (see A.4.4.1); place it in
a 100 mL volumetric flask. While constantly shaking it, add 30 mL of barium chloride
solution; thoroughly shake it to complete the precipitation. Then, use water to dilute to
the scale; shake it well; dry-filter it. Use a pipette to transfer-take 50 mL of filtrate; place
it in a 400 mL tall beaker. Add 15 mL of nitric acid solution and 35 mL of water; heat it
up and boil it for 15 min. While it is still hot, add 20 mL of quin-molybdenum-ketone
solution; use a watch glass to cover it; preserve the heat for 10 min (in the process of
adding reagents and heating, DO NOT use open flame, DO NOT stir it, so as avoid
condensation into lumps), then, cool it down to room temperature. Use a sintered-glass
filter crucible, which is dried to a constant mass at 180 °C ± 5 °C or 250 °C ± 10 °C, to
filter it by the pouring method. In a beaker, rinse and precipitate it for 3 times, with 15
mL of water each time. Transfer all the precipitate to the sintered-glass filter crucible,
then, continue to use water to rinse it (the used rinsing water is about 150 mL). At
180 °C ± 5 °C, dry it for 45 min, or at 250 °C ± 10 °C, dry it for 30 min. In a desiccator,
cool it down; weigh it.
A.5.5 Result calculation
The mass fraction w2 of inactive phosphate (calculated as P2O5) shall be calculated in
accordance with Formula (A.2):
Where,
m3---the mass of quinoline phosphomolybdate precipitate, expressed in (g);
0.03207---conversion factor of quinoline phosphomolybdate and phosphorus
pentoxide;
20---dilution factor;
m2---the mass of specimen (see A.4.4.1), expressed in (g).
The test results shall be subject to the arithmetic mean value of the parallel
determination results. The absolute difference between two independent determination
results obtained under repeatability conditions is not greater than 0.3%.
A.6 pH (10 g/L solution) Determination
The test results shall be subject to the arithmetic mean value of the parallel
determination results. The absolute difference between two independent determination
results obtained under repeatability conditions is not greater than 0.1%.
A.8 Determination of Iron (Fe)
A.8.1 Method summary
Use ascorbic acid to reduce the trivalent iron ions in the specimen solution to divalent
iron ions. When the pH is 2 ~ 9, the divalent iron ions and o-phenanthroline generate
orange-red complexes. Use a spectrophotometer to determine its absorbance at the
wavelength of 510 nm.
A.8.2 Reagents and materials
Same as Chapter 4 of GB/T 3049-2006.
A.8.3 Instruments and equipment
Same as Chapter 5 of GB/T 3049-2006.
A.8.4 Analytical procedures
A.8.4.1 Drawing of standard curve
In accordance with the stipulations of 6.3 in GB/T 3049-2006, in six 100 mL volumetric
flasks, prepare series standard solutions with the mass (mg) of iron (Fe) per 100 mL:
0.00 mg, 0.01 mg, 0.02 mg, 0.04 mg, 0.08 mg and 0.10 mg. Use 4 cm or 5 cm cuvette
to determine the absorbance of the standard solutions. Take the mass (mg) of iron (Fe)
per 100 mL as the x-coordinate; take the corresponding absorbance as the y-
coordinate; draw a standard curve.
A.8.4.2 Determination
Weigh-take about 3 g of specimen, accurate to 0.0002 g; place it in a 250 mL beaker.
Add 50 mL of water and 10 mL of hydrochloric acid solution; use a watch glass to cover
it. Heat it up and boil it for 15 min, then, cool it down to room temperature. Transfer all
to a 250 mL volumetric flask; use water to dilute to the scale; shake it well. Use a
pipette to transfer-take 25 mL of the test solution; place it in a 100 mL volumetric flask.
The subsequent steps shall follow the operations in 6.4 of GB/T 3049-2006, starting
from “if necessary, add water to 60 mL……”.
At the same time, conduct a blank test. Except that no specimen is added, the blank
test solution is the same as the test solution in the other operations and the added
reagents.
In accordance with the measured absorbance, from the standard curve, find out the
electrode as the measuring electrode; use the standard curve method to determine the
fluoride content.
A.12.2 Reagents and materials
A.12.2.1 Hydrochloric acid solution: 1 + 4.
A.12.2.2 Total ionic strength adjustment buffer (TISAB): in accordance with the
requirements of HG/T 3696.3, prepare it right before use.
A.12.2.3 Fluoride (F) standard solution: 1 mL contains 0.01 mg of fluoride (F). Use a
pipette to transfer-take 10 mL of fluoride (F) standard solution, which is prepared in
accordance with GB/T 602; place it in a 100 mL volumetric flask; use water to dilute to
the scale; shake it well.
A.12.3 Instruments and equipment
A.12.3.1 pH meter: with a division value of 1 mV; equipped with saturated calomel
electrode and fluoride ion selective electrode.
A.12.3.2 Magnetic stirrer.
A.12.4 Analytical procedures
A.12.4.1 Drawing of standard curve
In five 50 mL volumetric flasks, use a pipette to respectively add 1.00 mL, 2.00 mL,
3.00 mL, 4.00 mL and 5.00 mL of the fluoride (F) standard solution; accurately add 4
mL of hydrochloric acid solution; add 25 mL of the total ionic strength adjustment buffer
(TISAB); use water to dilute to the scale; shake it well. Connect the fluoride ion
selective electrode and the saturated calomel electrode to the negative and positive
ends of the pH meter. Insert the electrode into a 50 mL polyethylene beaker, which is
filled with water. Under electromagnetic stirring, read the equilibrium potential value,
replace the water, in which, the electrode is immersed, then, after the potential value
reaches an equilibrium, from low to high concentration, respectively determine the
potential value of the fluorine standard solution. Take the potential value as the y-
coordinate; take the logarithm of the fluoride mass (mg) as the x-coordinate; draw a
standard curve.
A.12.4.2 Determination
Weigh-take about 1 g of specimen, accurate to 0.0002 g; place it in a 50 mL
polyethylene beaker. Add a small amount of water to moisten it; accurately add 4 mL
of hydrochloric acid solution to dissolve it. Then, transfer all to a 50 mL volumetric flask.
Add 25 mL of the total ionic strength adjustment buffer (TISAB); use water to dilute to
the scale; shake it well. Determine the potential value of the test solution. In
accordance with the determined potential value, from the standard curve, find out the
......
GB 1886.4-2015
(National Food Safety Standard Food Additive hexametaphosphate)
National Standards of People's Republic of China
National Food Safety Standard
Food additive Sodium hexametaphosphate
Issued on. 2015-11-13
2016-05-13 implementation
People's Republic of China
National Health and Family Planning Commission released
Foreword
This standard replaces GB 1890-2005 "food additive sodium hexametaphosphate."
This standard compared with GB 1890-2005, the main changes are as follows.
--- Standard name was changed to "national food safety standards of food additive sodium hexametaphosphate."
National Food Safety Standard
Food additive Sodium hexametaphosphate
1 Scope
This standard applies to food additive sodium hexametaphosphate.
2 Technical Requirements
2.1 Sensory requirements
Sensory requirements shall comply with the requirements of Table 1.
Table 1 Sensory requirements
Project requires test methods
Colorless, transparent color
Glass flake or granular state
Take appropriate 50mL sample is placed in a beaker, observe the color in natural light and state
2.2 Physical indicators
Physical and chemical indicators should be consistent with the provisions of Table 2.
Table 2. Physical and chemical indicators
Item Index Test Method
Total phosphate (as P2O5), w /% ≥ 68.0 Appendix A A.4
Non-active phosphate (as P2O5), w /% ≤ 7.5 A.5 in Appendix A
Water-insoluble, w /% ≤ 0.06 A.6 in Appendix A
Iron (Fe), w /% ≤ 0.02 Appendix A A.7
pH 5.8 ~ 6.5 in Appendix A A.8
Arsenic (As)/(mg/kg) ≤ 3.0 GB 5009.76
Heavy metals (Pb)/(mg/kg) ≤ 10.0 GB 5009.74
Fluorides (as F), w /% ≤ 0.003 A.9 in Appendix A
Appendix A
Testing method
A.1 Warning
Reagents The test method used in toxic or corrosive, the operator should be careful. Such as water splashed on the skin should immediately
Flushing, severe cases should be treated immediately.
A.2 General Provisions
This standard reagents and water, did not indicate when the other requirements, refer to analytical reagent and third grade water GB/T 6682 regulations.
Standard solutions used in the tests, impurity standard solution, preparations and products, did not indicate when the other requirements, according to GB/T 601, GB/T 602,
The provisions of GB/T 603 formulation. Solution was used in the tests did not indicate what is formulated with solvent, it refers to an aqueous solution.
A.3 Identification Test
A.3.1 Reagents and materials
A.3.1.1 hydrochloric acid.
A.3.1.2 ammonia solution. 23.
A.3.1.3 silver nitrate ammonia solution. Weigh 1g silver nitrate, add water 20mL dissolved, stirring constantly add ammonia solution to the initially formed Shen
Precipitate dissolved, and filtered.
A.3.1.4 nitric acid solution. 19.
A.3.1.5 ammonium molybdate solution. Weigh 7.5g of ammonium molybdate was dissolved with 20mL water, stirring slowly added to a solution of nitric acid and 30mL
30mL water, allowed to stand for 24h, filtered through sintered glass crucible.
A.3.2 Identification method
A.3.2.1 Identification of sodium ions
Take a platinum wire, after wetting with hydrochloric acid, in the first combustion flame colorless to colorless, and then dipped in a colorless flame combustion of the sample, the flame that was fresh
yellow.
A.3.2.2 Identification of phosphate
A.3.2.2.1 Method One. Take a sample of a neutral solution, adding ammonia solution of silver nitrate which produce a yellow precipitate in ammonia solution or nitric acid solution
Both easy to dissolve.
A.3.2.2.2 Method two. take a sample solution, adding a solution of nitric acid and ammonium molybdate solution which produce a yellow precipitate, separation, precipitation in the ammonia solution can
Dissolved.
A.4 Total phosphate (as P2O5) Determination
A.4.1 Method summary
In acidic solution the hydrolysis of orthophosphate entire sample, after generation quimociac solution was added Quinoline phosphomolybdate precipitate was filtered, washed,
Weighing.
A.4.2 Reagents and materials
A.4.2.1 nitric acid solution. 11.
A.4.2.2 Quimociac solution. Press HG/T 3696.3 formulated.
A.4.3 Instruments and Equipment
Sintered glass crucible. filter plate pore size of 5μm ~ 15μm.
A.4.4 Analysis step
A.4.4.1 Preparation of sample solution
Weigh about 2g sample (accurate to 0.0002g), placed in 100mL beaker, dissolved in water, all transferred to 500mL volumetric flask,
Diluted with water to the mark. If necessary, filtration. This sample solution for determination of total phosphate, non-reactive phosphate.
A.4.4.2 Determination
Pipette Pipette 10mL sample solution, placed in 400mL-high beaker, 15mL and 70mL nitric acid solution in water, boiling
15min, while hot 50mL Quimociac solution, cover with a watch glass, insulation 10min (in addition of the reagents and the heating process, shall not be used
Fire can not be stirred to avoid clumping), cooled to room temperature. Already at 180 ℃ ± 5 ℃ about 45min dried to constant use of glass sand
The crucible was filtered by decantation, the precipitate was washed three times in a beaker, water each 15mL, sand and the precipitate transferred to a glass crucible, washed with water continues
(Used in the wash water of about 150mL), at 180 ℃ ± 5 ℃ dried for about 45min or lower at 250 ℃ ± 5 ℃ dried for about 30min, to a constant
Volume, cooled in a desiccator and weighed.
A.4.5 Calculation Results
Total phosphate (as P2O5) mass fraction w1, according to equation (A.1) Calculated.
w1 =
m1 × 0.03207
m2 ×
× 100% (A.1)
Where.
m1 --- quinoline phosphomolybdate precipitate mass, in grams (g);
0.03207 --- quinoline phosphomolybdate conversion factor and phosphorus pentoxide;
M2 --- the quality of the sample, in grams (g);
--- Conversion factor.
The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference
Not more than 0.3%.
A.5 non-reactive phosphate (as P2O5) Determination
A.5.1 Method summary
Barium chloride was added to the sample solution, and a precipitate of sodium hexametaphosphate, and filtered. Acid is added to the filtrate, so that the rest of the hydrolysis of phosphate
Generating orthophosphate, was added a solution after quimociac quinoline phosphomolybdate precipitate was filtered, washed, weighed.
A.5.2 Reagents and materials
A.5.2.1 nitric acid solution. 11.
A.5.2.2 Quimociac solution. Press HG/T 3696.3 formulated.
A.5.2.3 barium chloride (BaCl2 · 2H2O) solution. 250g/L.
A.5.3 Instruments and Equipment
Sintered glass crucible. filter plate pore size of 5μm ~ 15μm.
A.5.4 Analysis step
Pipette Pipette 50mL sample solution (A.4.4.1), placed in 100mL volumetric flask. Constantly shaking chloride was added 30mL
Barium solution, shake well to complete the precipitation, dilute to the mark, shake, dry filter. Pipette Pipette 50mL filtrate was placed 400
mL-high beaker, 15mL and 35mL nitric acid solution in water, boiling 15min, while hot 20mL Quimociac solution, micro-boiling
1min, cooled to room temperature.
With constant has been sintered glass crucible filtration decantation, the precipitate was washed three times in a beaker, water each 15mL, the precipitate was transferred to a glass
Sand crucible continues washed with water (water used in the washing of about 150mL), at 180 ℃ ± 5 ℃ or dried for about 45min at 250 ℃ ±
Under 5 ℃ dried for about 30min, to constant, cool in a desiccator and weighed.
A.5.5 Calculation Results
Non-active phosphate (as P2O5) mass fraction w2, according to equation (A.2) Calculated.
w2 =
m3 × 0.03207
m4 ×
× 100% (A.2)
Where.
m3 --- quinoline phosphomolybdate precipitate mass, in grams (g);
0.03207 --- quinoline phosphomolybdate conversion factor and phosphorus pentoxide;
M4 --- the quality of the sample, in grams (g);
--- Conversion factor.
The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference
Not more than 0.3%.
A.6 Determination of insoluble matter
A.6.1 Instruments and Equipment
Sintered glass crucible. filter plate pore size of 5μm ~ 15μm.
A.6.2 Analysis step
He said a sample taken after grinding about 30g (accurate to 0.01g), placed in a beaker of 400mL, 200mL of water was added and heated to boiling, filling
Sub dissolved while hot was at 105 ℃ ~ 110 ℃ drying to constant weight glass crucible sand filtration, washed with hot water 10 times (each time water
20mL), at 105 ℃ ~ 110 ℃ dried to constant weight.
A.6.3 Calculation Results
The mass fraction of water-insoluble w3, according to equation (A.3) Calculated.
w3 =
m5-m6
m7 ×
100% (A.3)
Where.
Quality m5 --- water insoluble sand and glass crucible, in grams (g);
M6 --- quality glass sand crucible in grams (g);
m7 --- sample mass, in grams (g).
The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference
Not more than 0.01%.
A.7 Determination of iron (Fe) of
A.7.1 Method summary
Reduction with ascorbic acid in the sample solution of ferric ions into ferrous ions, at a pH of from 2 to 9.00, a divalent iron ions with phenanthroline
Morpholino generated orange-red complex with a spectrophotometer measuring the absorbance at the maximum absorption wavelength at 510nm.
A.7.2 Reagents and materials
GB/T in accordance with Chapter 4 in 3049-2006.
A.7.3 Instruments and Equipment
Chapter 5 3049-2006 according to GB/T .
A.7.4 Analysis step
A.7.4.1 draw the curve
GB T 3049-2006 according to the provisions of 6.3/use of 4cm or 5cm iron absorption cell and the corresponding standard solution, drawn work
curve.
A.7.4.2 Preparation of sample solution
Weigh about 3g sample (accurate to 0.01g), placed in 250mL beaker, moistened with a little water, stamped with a watch glass beaker wall along slowly
10mL of hydrochloric acid was added, the sample is completely dissolved. 50mL water was added and heated micro-boiling 15min, cooling, all transferred into 250mL capacity
Bottle diluted with water to the mark. Accurate Pipette 25mL this solution was placed in 100mL flask aside.
A.7.4.3 Preparation of blank solution
Except that no sample addition, the same amount of reagent preparation to join the other with the sample solution and simultaneously.
A.7.4.4 sample measurement
In the flask containing the sample solution and the blank solution, add water to 60mL, following in GB/T 3049-2006 Regulation 6.4
, The transition from "with ammonia solution or hydrochloric acid solution to adjust the pH to 2" began to "test solution absorbance was measured two" so far.
A.7.4.1 selection and specification in the same absorption cell (4cm or 5cm absorption cell), according to GB/T 3049-2006 measured as specified in 6.4
Absorbance, find out the quality of the sample solution and blank solution of iron from the working curve.
A.7.5 Calculation Results
Iron (Fe) mass fraction w4, according to equation (A.4) Calculated.
w4 =
m8-m9
m10 ×
250 × 10
× 100% (A.4)
Where.
Quality m8 --- Richard from the working curve of the sample solution in iron, in micrograms (μg);
m9 --- Richard from the working curve of the blank solution iron mass, in micrograms (μg);
M10 --- the quality of the sample, in grams (g);
--- Conversion factor;
106 --- conversion factor.
The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference
Not more than 0.001%.
A.8 pH measurement of
A.8.1 Instruments and Equipment
PH meter. accuracy 0.02pH. With a saturated calomel electrode and a glass electrode.
A.8.2 Analysis step
Weigh 1.00g ± 0.01g sample was placed in 250mL beaker, dissolved in 100mL of carbon dioxide-free water. At room temperature
PH meter, a saturated calomel electrode as the reference electrode, glass electrode measuring electrode for measuring pH of the solution.
A.9 fluoride (as F) measurement
A.9.1 Method summary
After the sample was dissolved in pH5.5 ~ 6.0 acidic medium, a saturated calomel electrode as the reference electrode to fluoride ion selective electrode to measure
Electrode, measuring the fluorine content by working curve method.
A.9.2 Reagents and materials
A.9.2.1 hydrochloric acid solution. 14.
A.9.2.2 total ionic strength adjustment buffer (TISAB). Extemporaneous.
A.9.2.3 fluoro standard solution. 1mL fluorine (F) 10μg.
A.9.3 Instruments and Equipment
A.9.3.1 fluorine electrode.
A.9.3.2 calomel electrode.
A.9.3.3 potentiometer.
A.9.3.4 magnetic stirrer.
A.9.4 Analysis step
Preparation A.9.4.1 fluoro standard working solution
5 in 50mL volumetric flask, were added with a pipette 1.00mL, 2.00mL, 3.00mL, 4.00mL, 5.00mL fluoro standard
Solution was added 4mL accurate hydrochloric acid solution, add 25mL total ionic strength adjustment buffer (TISAB), diluted with water to the mark.
A.9.4.2 preparation of the sample solution
Weigh 1g sample (accurate to 0.01g), the exact solution of hydrochloric acid was added 4mL and 25mL total ionic strength of the buffer solution was dissolved, placed
50mL volumetric flask, dilute to the mark, shake.
A.9.4.3 Determination
Fluorine and a negative electrode and a positive terminal calomel electrode and the potentiometer connected to electrodes inserted into a beaker filled with water 50mL of polyethylene,
Preheating equipment, constant stirring on a magnetic stirrer, the value of the equilibrium potential reading. Replace the water soak the electrode to electrode power specified in the instructions
After the bit value to the standard working solution and the potential of the sample solution was measured.
Equilibrium potential fluoro standard working solution were measured from low to high concentrations. Electrode potentials as ordinate, the fluorine ion concentration (μg/mL)
As abscissa, the standard curve on semi-logarithmic graph paper.
The same method for determining the equilibrium potential of the sample solution, the fluorine content in the sample isolated from the standard curve.
A.9.5 Calculation Results
Fluorine (F) the mass fraction w5, according to equation (A.5,) Calculated.
w5 =
m11
m12 × 106
× 100% (A.5)
Where.
Quality m11 --- Richard from the working curve of fluorine in the sample solution, in micrograms (μg);
M12 --- the quality of the sample, in grams (g);
106 --- conversion factor.
The results parallel arithmetic mean of the measurement results shall prevail. Twice under the same condition of independent determination results obtained absolute difference
Not more than 0.01%.
......
| Standard ID | GB 1886.4-2020 (GB1886.4-2020) | | Description (Translated English) | National food safety standard - Food additive - Sodium hexametaphosphate | | Sector / Industry | National Standard | | Classification of Chinese Standard | X09 | | Word Count Estimation | 11,187 | | Date of Issue | 2020-09-11 | | Date of Implementation | 2021-03-11 | | Older Standard (superseded by this standard) | GB 1886.4-2015 | | Regulation (derived from) | National Health Commission Announcement No. 7 (2020) of the State Administration for Market Regulation | | Standard ID | GB 1886.4-2015 (GB1886.4-2015) | | Description (Translated English) | National Food Safety Standard -- Food Additives -- Sodium Hexametaphosphate | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Word Count Estimation | 10,179 | | Date of Issue | 2015-11-13 | | Date of Implementation | 2016-05-13 | | Older Standard (superseded by this standard) | GB 1890-2005 | | Regulation (derived from) | National Health and Family Planning Commission Announcement No |
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