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GB 29216-2012: Food additive propylene glycol
Status: Valid
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Food additive propylene glycol
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Basic data
Standard ID: GB 29216-2012 (GB29216-2012)
Description (Translated English): Food additive propylene glycol
Sector / Industry: National Standard
Classification of Chinese Standard: X40
Classification of International Standard: 67.220.20
Word Count Estimation: 5,563
Regulation (derived from): Ministry of Health Bulletin 2012 No. 23
Issuing agency(ies): Ministry of Health of the People's Republic of China
Summary: This Chinese standard applies to propylene oxide and water as raw materials, direct hydration method were food additive propylene glycol.
GB 29216-2012: Food additive propylene glycol
---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 additive propylene glycol
National Standards of People's Republic of China
National standards for food safety
Food Additives Propylene Glycol
2012-12-25 release
2013-01-25 Implementation
Issued by the Ministry of Health of the People's Republic of China
National standards for food safety
Food Additives Propylene Glycol
1 Scope
This standard applies to propylene oxide and water as raw materials, direct hydration method of the food additive propylene glycol.
2 molecular formula, structural formula and relative molecular mass
2.1 Molecular formula
C3H8O2
2.2 Structural formula
H3C
OH
OH
2.3 Relative molecular mass
76.10 (according to.2007 International Relative Atomic Quality)
3 technical requirements
3.1 sensory requirements
Shall comply with the provisions of Table 1.
Table 1 sensory requirements
The project requires a test method
Color and colorless
State transparent, no sediment and suspended solids viscous liquid
Take appropriate sample, placed in a clean, dry colorimetric tube, in natural light
Line, observe the color and state
3.2 Physical and chemical indicators
Shall comply with the provisions of Table 2.
Table 2 Physical and chemical indicators
Item Index Test Method
Propylene glycol content, w /% ≥ 99.5 Appendix A, A.4
Boiling range
Initial boiling point/℃ ≥ 185
Dry point/℃ ≤ 189
GB/T 7534
Relative density (25 ℃/25 ℃) 1.035 ~ 1.037 GB/T 4472
Moisture, w /% ≤ 0.2 GB/T 6283
The acidity passes through Test Appendix A in A.5
Cracking residue, w /% ≤ 0.007 Appendix A A.6
Lead (Pb)/(mg/kg) ≤ 1 Appendix A A.7
Appendix A
Testing method
A.1 Warning
The test procedure specifies that some of the test procedures may lead to dangerous conditions and that the operator should take appropriate safety and protective measures.
A.2 General provisions
Unless otherwise stated, only the reagents identified as analytical reagents and the tertiary water specified in GB/T 6682-2008 are used in the analysis.
Standard titration solution used in the test method, standard solution for the determination of impurities, preparations and articles, in the absence of other requirements,
GB/T 601, GB/T 602 and GB/T 603. The solution used, when not specified refers to the aqueous solution.
A.3 Identification test
Using infrared absorption spectroscopy. The infrared spectra of the samples were compared with the standard spectra in the range of 3800 cm-1 to 650 cm-1
The characteristic absorption peaks should be consistent.
A.4 Determination of propylene glycol content
A.4.1 Methodological Summary
Using gas chromatography. Under the selected chromatographic operating conditions, the samples were vaporized and separated by a column using a thermal conductivity detector (TCD)
Detection, area normalization method quantification.
A.4.2 Reagents and materials
Helium. volume fraction ≥ 99.9%.
A.4.3 Instruments and equipment
A.4.3.1 Gas Chromatograph. equipped with thermal conductivity detector (TCD), the machine sensitivity and stability in line with GB/T 9722 requirements, linear
Meet the analysis requirements.
A.4.3.2 Chromatographic Data Processor or Integrator.
A.4.3.3 Syringe. 1 mL.
A.4.4 Chromatographic operating conditions
The recommended column and chromatographic operating conditions for this standard are given in Table A.1. Other columns and chromatographic columns that achieve the same degree of separation
Pieces can also be used.
Table A.1 Recommended Columns and Typical Chromatographic Operating Conditions
Stationary Phase
Polyethylene glycol -20M coated on 0.25mm to 0.38mm red diatomaceous earth or suitable
When the material. The fixation ratio was 1.25
Filled column stainless steel column, 1m × 8mm (column length × column diameter)
The oven temperature was 120 ° C and the temperature was raised to.200 ° C at a rate of 5 ° C/min
Vaporization chamber temperature/℃ 240
Detector temperature/250 ° C
Carrier gas (He) Flow rate/(mL/min) 75
Injection volume/μL 10
A.4.5 Analysis steps
According to the instrument manual, adjust the instrument to the operating conditions shown in Table A.1, the instrument can be measured after the stability of the sample. With corrected area
Normalization method.
The retention times of the three dipropylene glycol isomers in the chromatogram were 8.2 min, 9.0 min and 10.2 min, respectively.
A.4.6 Calculation of results
The mass fraction w1 of propylene glycol is calculated according to formula (A.1)
w1 =
ΣAi ×
(1-w3) x 100% (A.1)
Where.
A - the peak area of propylene glycol;
Ai - the peak area of component i;
w3 - the value of the mass fraction of water in the measured sample.
The arithmetic mean of the results of two parallel measurements is the result of the measurement. The absolute difference between the two parallel determinations is not greater than 0.1%.
A.5 Determination of acidity
A.5.1 Reagents and materials
A.5.1.1 sodium hydroxide standard titration solution. c (NaOH) = 0.01 mol/L.
A.5.1.2 phenolphthalein indicator solution. 10g/L.
A.5.2 Analysis steps
Add about 50 mL of water in a 250 mL Erlenmeyer flask, add 3 to 6 drops of phenolphthalein indicator solution, titrate with titration solution with sodium hydroxide
The solution was pink and held for 30 s. Weigh about 50g sample, accurate to 0.01g, add to the conical flask, with sodium hydroxide standard titration solution
Liquid titration to the solution was pink and keep 15s, consumption of sodium hydroxide standard titration solution volume should not exceed 1.67mL.
A.6 Determination of burning residue
A.6.1 Reagents and materials
sulfuric acid.
A.6.2 Instruments and equipment
A.6.2.1 Crucible. 100 mL.
A.6.2.2 High temperature furnace. Controlled temperature 800 ℃ ± 25 ℃.
A.6.3 Analysis steps
Weigh about 50g sample, accurate to 0.01g, placed in the crucible, heated to the sample lit, stop heating, to be burned, cooling crucible,
Add 5mL sulfuric acid to wet the residue and heat until the white smoke disappears. The crucible into the high temperature furnace, at 800 ℃ ± 25 ℃ burning 15min, take
The crucible is placed in a desiccator to cool and weigh.
A.6.4 Calculation of results
The mass fraction w2 of the burning residue is calculated according to the formula (A.2)
w2 =
(m2-m1)
m x 100%
(A.2)
Where.
m1 --- the value of the mass of the empty crucible, in grams (g);
m2 --- crucible plus residue mass value, the unit is grams (g);
m - the mass of the sample, in grams (g).
A.7 Determination of lead (Pb)
According to the method specified in GB 5009.12, the sample treatment is carried out according to GB/T 5009.75. The graphite furnace is used to absorb light
When the spectrum is measured, the sample solution is properly diluted as viewed in the sample.
......
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