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Journal of oleo science

Journal of oleo science

IF: 1.6
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Preparation of ethyl magnesium bromide for regiospecific analysis of triacylglycerols.

Published:1 January 2008 DOI: 10.5650/jos.57.459 PMID: 18622130
Yasuhiro Ando, Yuki Tomita, Yusuke Haba

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.

Substances (4)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Bromoethane 74-96-4 C2H5Br 492 suppliers $9.00-$610.00
Ethylmagnesium bromide 925-90-6 C2H5BrMg 398 suppliers $12.00-$4340.07
1 3-DISTEAROYL-2-OLEOYLGLYCEROL 2846-04-0 C57H108O6 24 suppliers $62.00-$503.53
2-fluorophenylmagnesium bromide 446-53-7 C6H4BrFMg 15 suppliers Inquiry

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