Document Detail

Relative efficiency of free fatty acid butyl esterification choice of catalyst and derivatisation procedure.
MedLine Citation:
PMID:  18533162     Owner:  NLM     Status:  MEDLINE    
The conversion efficiency of alkanoic, alkenoic, branched, alicyclic, aromatic, keto-substituted, and dioic carboxylic acids to their corresponding butyl esters was compared under different reaction conditions (time, temperature, catalyst). We show that boron trifluoride is generally a more efficient catalyst than sulphuric acid. However, optimum derivatisation conditions vary strongly for different acids and no single derivatisation protocol can be employed without certain losses. Therefore, care must be taken when the simultaneous quantitative analysis of different types of carboxylic acids in one sample is envisaged. Addition of water-scavenging reagents to the reaction mixture caused the formation of artefacts and selectively decreased reaction yields.
Christian Hallmann; Ben G K van Aarssen; Kliti Grice
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-05-22
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1198-1199     ISSN:  0021-9673     ISO Abbreviation:  J Chromatogr A     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-20     Completed Date:  2008-09-22     Revised Date:  2009-01-15    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  14-20     Citation Subset:  IM    
Department of Applied Chemistry, Curtin University of Technology, GPO Box U1987, Perth, Western Australia 6845, Australia.
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MeSH Terms
Carboxylic Acids / analysis,  chemistry
Fatty Acids, Nonesterified / chemistry*
Gas Chromatography-Mass Spectrometry
Time Factors
Reg. No./Substance:
0/Carboxylic Acids; 0/Fatty Acids, Nonesterified

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