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SN/T 3344-2012 English PDF

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SN/T 3344-2012: Determination of free glycerin in crude glycerin. Gas chromatography
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SN/T 3344-2012English209 Add to Cart 3 days [Need to translate] Determination of free glycerin in crude glycerin. Gas chromatography Valid SN/T 3344-2012

Standard similar to SN/T 3344-2012

SN/T 5268   

Basic data

Standard ID SN/T 3344-2012 (SN/T3344-2012)
Description (Translated English) Determination of free glycerin in crude glycerin. Gas chromatography
Sector / Industry Commodity Inspection Standard (Recommended)
Word Count Estimation 8,890
Regulation (derived from) National Quality Inspection (2012) 777; industry standard filing Notice 2013 No. 4 (No. 160 overall)
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the crude glycerol of free glycerol content Gas chromatographic method. This standard applies to the mass fraction of less than 95% bio-diesel made crude glycerin byproduct, industrial saponification glycerine and synthetic glyceri

SN/T 3344-2012: Determination of free glycerin in crude glycerin. Gas chromatography

---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.
Determination of free glycerin in crude glycerin.Gas chromatography People's Republic of China Entry-Exit Inspection and Quarantine Standards Crude glycerol free glycerol determination Gas chromatography Issued on. 2012-12-12 2013-07-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Ding Hua, Li Xidong, Zhouqiu Hong, lord Hing. Crude glycerol free glycerol determination Gas chromatography

1 Scope

This standard specifies the gas chromatographic method crude glycerol free glycerol content. This standard applies to the mass fraction of less than 95% of the by-product bio-diesel made crude glycerin, industrial saponification glycerol synthetic glycerine.

2 Method summary

After the sample was added acetic anhydride was heated to produce triacetin after derivatization reaction was measured by gas chromatography internal standard method.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical reagents. Sample Glycerin 3.1 (C3H8O3). content of more than 99%. Acetic anhydride 3.2 (C4H6O3). content greater than 95%. 3.3 Internal standard. ethyl benzoate (C9H10O2), content greater than 99%.

4 Instrument

4.1 Gas chromatograph. equipped with a flame ionization detector (FID). 4.2 micro-injector. 10μL. 4.3 Pipette. 1mL, 25mL. 4.4 dropper. 25mL. 4.5 stoppered conical flask. 125mL. 4.6 Analysis of balance. a sense of the amount of 0.1mg.

5 Sample

Crude glycerin samples were thoroughly mixed, placed in a dropper bottle and set aside. Step 6 Analysis 6.1 Preparation of the sample By Difference Method Weigh 0.4g ~ 0.5g sample of the crude glycerol in stoppered Erlenmeyer flask, accurate to 0.2mg. 6.2 Derivative In a sample containing glycerin stoppered Erlenmeyer flask, 25mL acetic anhydride (3.2), placed in an oven at 120 ℃ reaction 2h. Remove to cooling

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