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Determination of trans fatty acids in foods. Capillary gas chromatography
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SN/T 1945-2007
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Basic data | Standard ID | SN/T 1945-2007 (SN/T1945-2007) | | Description (Translated English) | Determination of trans fatty acids in foods. Capillary gas chromatography | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.050 | | Word Count Estimation | 20,215 | | Date of Issue | 2007-08-06 | | Date of Implementation | 2008-03-01 | | Quoted Standard | GB/T 5009.6; GB/T 5009.46 | | Regulation (derived from) | National-accreditation-Science [2011] 63 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the trans fatty acids in foods by gas chromatographic method. This standard applies to foods Determination of trans fatty acid content. | SN/T 1945-2007: Determination of trans fatty acids in foods. Capillary 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 trans fatty acids in foods.Capillary gas chromatography
Exit inspection and quarantine industry standard book People's Republic of China
Determination of trans fatty acids in food content
Capillary Gas Chromatography
Posted 2007-08-06
2008-03-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard Annex A, Annex B, Annex C and Annex D are informative appendices.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Fujian Exit Inspection and Quarantine, People's Republic of China Shanghai Entry-Exit Inspection and
Quarantine Bureau.
The main drafters of this standard. Huang Jie, Li Han, I Contier, Caichun Ping, Li Shousong, Zhou Lirong.
This standard is the first release of the entry-exit inspection and quarantine industry standards.
Determination of trans fatty acids in food content
Capillary Gas Chromatography
1 Scope
This standard specifies the gas chromatographic determination of trans fatty acids in food.
This standard applies to the determination of trans fatty acids in food content.
2 Normative references
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Determination of GB/T 5009.6 fat foods
GB/T 5009.46 Milk and dairy hygiene standard analytical methods
3 Determination
3.1 Method summary
Sample extract fat with diethyl ether, potassium hydroxide - methanol solution, fat hydrolysis, methyl esterification, into fatty acid methyl ester with
Equipped with a flame ionization detector capillary gas chromatograph measured normalized quantification.
3.2 Reagents and materials
All reagents unless otherwise specified, were of analytical grade, water re-distilled water.
3.2.1 ether.
3.2.2 methanol.
3.2.3 n-hexane.
3.2.4 Potassium hydroxide.
3.2.5 Potassium hydroxide - methanol solution. concentration of 4mol/L, weighed 113g of potassium hydroxide was dissolved in 500mL methanol.
3.2.6 Fatty acid methyl ester standards. purity > 99%. Species in Appendix A.
3.2.7 FAME mixed standard stock solution. Weigh accurately a variety of fatty acid methyl ester standards 50.0mg, adding hexane to dissolve, set the volume to
25mL brown volumetric flask, formulated at a concentration of 2.00mg/mL mixed standard stock solution, home refrigerator.
3.2.8 FAME mixed standard working solution. Imbibe standard storage solution 5.0mL, plus normal hexane at 25mL brown capacity
Bottle, formulated at a concentration of 0.400mg/mL working standard solutions, home refrigerator.
3.3 instruments and equipment
3.3.1 Gas chromatograph with hydrogen flame ionization detector.
3.3.2 flask. 50mL or 100mL.
3.3.3 shaker.
3.4 Procedure
3.4.1 extract fat
3.4.1.1 Grease samples. Liquid samples directly after mixing, according to 3.4.2; non-liquid samples, water bath heated to melt into liquid after mixing
Uniform, according to 3.4.2; avoid sample is heated in metal containers directly on the heat source.
3.4.1.2 Non-oil sample. Take crushed homogeneous samples, according to fat content, amount of weighed samples (fat content > 500mg), extracted with ether three
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