Document Detail


Fast Transmethylation of Serum Lipids Using Microwave Irradiation.
MedLine Citation:
PMID:  23015312     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Microwave irradiation as the energy source for one-step direct transesterification of fatty acids in human serum lipids was examined in a solvent system of methanol: hexane: acetyl chloride based on a Lepage & Roy assay. Innovative and explosion proof single-mode or multimode microwave accelerated reaction system was employed. Recoveries were calculated as the percentage of fatty acid concentrations measured by microwave assay to those by the reference method of the Lepage & Roy assay that utilized conductive heating at 100 °C for 60 min. Under conditions of 100 °C for 1 min in Single-mode (S4-100 × 1), or 125 °C for 5 min in Multimode (M5-125 × 5), the recoveries were 100-103 % for the total fatty acids and 96-106 % for each categorized fatty acid, including saturates, monounsaturates, n-6 PUFA, and n-3 PUFA. For individual PUFA, the mean recoveries were 102-105 % for 18:2n-6 and 18:3n-3; 99, 109, and 95 % for 20:4n-6, 20:5n-3, and 22:6n-3, respectively. Thus, fatty acid concentrations determined by microwave fatty acid assay were accurate to those results by the reference method, when the microwave conditions were optimal. In summary, the microwave irradiation could replace conductive heating in one-step direct transesterification, and reduce the duration from 60 min to 5 min or less. This methodology may be applied in both the absolute and relative quantification of serum total fatty acids.
Authors:
Yu Hong Lin; James D Loewke; Duk Y Hyun; Jay Leazer; Joseph R Hibbeln
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-27
Journal Detail:
Title:  Lipids     Volume:  -     ISSN:  1558-9307     ISO Abbreviation:  Lipids     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0060450     Medline TA:  Lipids     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Laboratory of Membrane Biochemistry and Biophysics, Section of Nutritional Neuroscience, National Institute on Alcohol Abuse & Alcoholism, National Institutes of Health, Bethesda, MD, 20892, USA, yulin@mail.nih.gov.
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