Preparation of Ethyl Magnesium Bromide for Regiospecific Analysis of Triacylglycerols
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- Ando Yasuhiro
- Laboratory of Marine Bioresources Chemistry, Division of Marine Life Science, Faculty of Fisheries Sciences, Hokkaido University
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- Tomita Yuki
- School of Fisheries Sciences, Hokkaido University
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- Haba Yusuke
- Graduate School of Fisheries Sciences, Hokkaido University
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Abstract
This paper presents a procedure for preparation of a Grignard reagent, ethyl magnesium bromide, used for partial deacylation of triacylglycerols (TAG) in their regiospecific analysis. Magnesium turnings were reacted with ethereal solution of bromoethane in a screw-capped test tube to synthesize 2 mL of 1 M ethyl magnesium bromide. Continuously stirred with a vortex mixer, the reaction smoothly proceeded at room temperature. Regiospecific analysis of 1,3-distearoyl-2-oleoylglycerol using this product showed that fatty acid compositions of the sn-1(3) and sn-2 positions were contaminated by less than 2 mol% of fatty acids migrated from isomeric positions. The analyses of lard and cod liver/mackerel oil TAG showed typical distribution patterns of 16:0, 22:5n-3 and 22:6n-3 in pig and fish depot TAG. These results confirmed the view that the freshly prepared reagent is usable for regiospecific analysis of TAG.<br>
Journal
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- Journal of Oleo Science
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Journal of Oleo Science 57 (8), 459-462, 2008
Japan Oil Chemists' Society
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Details 詳細情報について
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- CRID
- 1390001204092148096
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- NII Article ID
- 130000055383
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- NII Book ID
- AA11503337
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- ISSN
- 13473352
- 13458957
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- NDL BIB ID
- 9579417
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed