GB 29218-2012 English PDF

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US$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB 29218-2012: National food safety standards -- Food additives -- Methanol
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 29218-2012	169	Add to Cart	3 days	National food safety standards -- Food additives -- Methanol	Valid

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Basic data

Standard ID: GB 29218-2012 (GB29218-2012)
Description (Translated English): National food safety standards -- Food additives -- Methanol
Sector / Industry: National Standard
Classification of Chinese Standard: X40
Classification of International Standard: 67.220.20
Word Count Estimation: 7,722
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 coal, natural gas, light oil, heavy oil as raw food additive methanol.

GB 29218-2012: National food safety standards -- Food additives -- Methanol

---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.
National food safety standards.Food additives.Methanol National Standards of People's Republic of China National standards for food safety Food Additives Methanol 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 Methanol

1 Scope

This standard applies to coal, natural gas, light oil, heavy oil as raw material for the production of food additives methanol.

2 molecular formula and relative molecular mass

2.1 Molecular formula CH3OH 2.2 Relative molecular mass 32.04 (according to.2007 International relative atomic mass)

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 liquid Take appropriate sample, placed in a clean, dry colorimetric tube, in the self Under the light, 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 Methanol content, w /% ≥ 99.5 Appendix A, A.4 Moisture, w /% ≤ 0.1 GB 5009.3 Karl Fischer method Carbonyl compounds (in formaldehyde), w /% ≤ 0.010 GB/T 6324.5-2008 4.2a Distillation range/℃ 64.5 ~ 65.5 GB/T 7534 Evaporation residue/(mg/100mL) ≤ 3 GB/T 6324.2 Table 2 (continued) Item Index Test Method Acidity (in formic acid)/(mg/kg) ≤ 15 Appendix A A.5 Alkalinity (in ammonia)/(mg/kg) ≤ 3 Appendix A A.6 Lead (Pb)/(mg/kg) ≤ 2 GB 5009.12 a measurement wavelength of 430nm.

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. test Method used in the standard titration solution, impurity determination standard solution, preparation and products, without any other requirements, according to GB/T 601, GB/T 602 and GB/T 603; the solution used in the absence of the solvent, refers to the aqueous solution. A.3 Identification test A.3.1 Solubility Soluble in water, ether and ethanol. A.3.2 Refractive index According to the provisions of GB/T 614 determination. Refractive index n (20, D) should be. 1.328 ~ 1.330. A.3.3 Density According to the provisions of GB/T 4472 to determine. The density (ρ20) should be 0.790 g/cm3 to 0.793 g/cm3. A.3.4 Boiling point According to the method specified in GB/T 7534. The boiling point should be about 65 ° C. A.4 Determination of methanol content A.4.1 Methodological Summary Under the selected working conditions, the samples were vaporized through the column, the components were separated and detected with a hydrogen flame ionization detector. use Determination of Methanol Content by Area Normalization Method. A.4.2 Reagents and materials Calibration solution (mixed with methanol and 1,4-dioxane). 1 250. A.4.3 Instruments and equipment A.4.3.1 Gas chromatograph. equipped with flame ionization detector, the machine sensitivity and stability in line with GB/T 9722 in the relevant provisions. A.4.3.2 Recorder. Chromatographic data processor or chromatographic workstation. A.4.3.3 Sampler. Microinjector. A.4.4 Columns and Typical Chromatographic Operating Conditions The recommended column and typical chromatographic operating conditions are given in Table A.1. Other columns that can meet the analytical requirements and chromatographic operating conditions are also available use. Table A.1 Recommended Columns and Typical Chromatographic Operating Conditions Column Column length 1.8m, column diameter 4mm, filler 105μm ~ 120μm benzene Ethylene - divinylbenzene polar monomer copolymer Column temperature/° C 160 Vaporization chamber temperature/℃.200 Detector temperature/℃ 210 Carrier gas (nitrogen) Flow rate/(mL/min) 25 Injection volume/μL 5 ~ 10 A.4.5 Analysis steps The temperature of the mild (or) carrier gas of the regulator column is such that the retention time of the methanol is about 5 min to 7 min. Adjust the detector to make 8 μL of the calibration solution The resulting peaks are in the middle of the spectral range. Injection of 5μL ~ 10μL sample, to obtain the chromatogram, with the area normalization method Methanol content. A.4.6 Calculation of results The mass fraction w1 of methanol is calculated according to formula (A.1) w1 = A1 ΣAi × 100% (A.1) Where. A1 --- the peak area of methanol; ΣAi --- the sum of the peak areas of all components. A.5 Determination of acidity (in form formic acid) A.5.1 Reagents and materials A.5.1.1 Ethanol. A.5.1.2 Sodium hydroxide standard titration solution. c (NaOH) = 0.02 mol/L. A.5.1.3 phenolphthalein indicator solution. 10g/L. A.5.2 Analysis steps 10 mL of ethanol and 25 mL of water were mixed by adding 0.5 mL of phenolphthalein indicator solution, titrated with sodium hydroxide titration solution titrated to the first The pink appears and remains at least 30s. Add 19 mL (about 15 g) of the sample, mix and titrate the titration solution with sodium hydroxide standard until Times appear pink. Sodium hydroxide standard titration solution should be used in the amount of not more than 0.25mL. A.6 Determination of alkalinity (in ammonia) A.6.1 Reagents and materials A.6.1.1 Sulfuric acid standard titration solution. c (1/2H2SO4) = 0.02 mol/L. A.6.1.2 methyl red indicator solution. 1g/L. A.6.2 Analysis steps Add 1 drop of methyl red indicator to 25 mL of water and titrate to red with standard titration solution of sulfuric acid. Add 29 mL (approx. 22.5 g) sample, mix well. Titration with sulfuric acid standard titration solution to red again, sulfuric acid standard titration solution should not be used At 0.2 mL. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB 29218-2012_English be delivered?

Answer: Upon your order, we will start to translate GB 29218-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB 29218-2012_English with my colleagues?

Answer: Yes. The purchased PDF of GB 29218-2012_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.