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Inspection of grain and oils - Determination of the difference between actual and theoretical content of triacylglycerols with ECN 42
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GB/T 37512-2019
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Basic data
| Standard ID | GB/T 37512-2019 (GB/T37512-2019) |
| Description (Translated English) | Inspection of grain and oils - Determination of the difference between actual and theoretical content of triacylglycerols with ECN 42 |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | X04 |
| Classification of International Standard | 67.040 |
| Word Count Estimation | 18,172 |
| Date of Issue | 2019-05-10 |
| Date of Implementation | 2019-12-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 37512-2019: Inspection of grain and oils - Determination of the difference between actual and theoretical content of triacylglycerols with ECN 42
---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.
Inspection of grain and oils--Determination of the difference between actual and theoretical content of triacylglycerols with ECN 42
ICS 67.040
X04
National Standards of People's Republic of China
Grain and oil inspection actual and theoretical ECN42
Determination of the difference in content of glycidyl ester
Published on.2019-05-10
2019-12-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the National Grain and Material Reserve Bureau.
This standard is under the jurisdiction of the National Grain and Oil Standardization Technical Committee (SAC/TC270).
This standard was drafted. National Academy of Food Science Research Institute.
The main drafters of this standard. Zhang Rui, Xue Yalin, Zhang Bing.
Grain and oil inspection actual and theoretical ECN42
Determination of the difference in content of glycidyl ester
1 Scope
This standard specifies the actual equivalent carbon number 42 (ECN42 HPLC) triglyceride content in oils and fats and the theoretical equivalent carbon number 42 (ECN42 theory)
A method for determining the absolute difference in triester content.
This standard applies to olive oil and is suitable for testing whether various types of olive oil are mixed with a small amount of seed oil (rich in linoleic acid).
Note. ECN42HPLC is determined by high performance liquid chromatography, and the ECN42 theory is calculated from the fatty acid composition determined by gas chromatography.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB 5009.168 National Food Safety Standard Determination of Fatty Acids in Foods
GB/T 23347 olive oil, olive pomace oil
COI/T 20/Doc.No.24 Preparation of olive oil and olive pomace fatty acid methyl ester (Preparationofthefattyacid
Methylestersfromoliveoilandolive-pomaceoil)
3 Principle
ECN42 theory of triglyceride content and its difference with ECN42 HPLC triglyceride content is a collaborative calculation of data obtained by other methods.
Obtained, including gas chromatographic determination of fatty acid composition, calculation of theoretical ECN42 content of triglyceride and determination of ECN42 by high performance liquid chromatography
Triglyceride content.
For real olive oil, the actual ECN42 triglyceride content measured by high performance liquid chromatography and the fat measured by gas chromatography
The theoretical ECN42 triglyceride content difference calculated from the acid composition should be within a certain limit. When the difference is greater than the corresponding grade of olive oil
It indicates that the olive oil contains seed oil.
4 instruments
4.1 Round bottom flask. 250 mL and 500 mL.
4.2 Beaker. 100mL.
4.3 Glass column. inner diameter 21mm, length 450mm, equipped with a cock, the upper port is a standard internal grinding port.
4.4 Separating funnel. 250mL, the bottom is the standard external grinding port, matched with the port on the glass column.
4.5 Glass rod. 600mm long.
4.6 Glass funnel. 80mm in diameter.
4.7 Volumetric flask. 50mL.
4.8 Volumetric flask. 20mL.
4.9 Rotate the evaporator.
4.10 High performance liquid chromatography. equipped with column temperature and temperature control device.
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