NDLI: Identification of Aromatic Fatty Acids in Butter Fat

Content Provider	Springer Nature Link
Author	Schröder, Markus Abdurahman, Halima Ruoff, Tanja Lehnert, Katja Vetter, Walter
Copyright Year	2014
Abstract	Bovine milk fat contains a large variety of structurally different fatty acids. In this study, we describe the presence of aromatic fatty acids in a butter fat sample. Fatty acids were released from butter fat and converted into the corresponding methyl esters (FAME). Urea complexation was used to separate the main saturated fatty acids. GC/MS screening of the FAME in the filtrate of the urea complexation indicated the presence of aromatic fatty acids. By (1) conversion of two representatives into picolinyl esters which were analyzed by GC/MS, (2) linear log t$_{R}$ over carbon number plots (R $^{2}$ = 0.95) and by the use of two reference standards we were able to show that the phenyl unit was located on the terminal carbon of the straight acyl chain of the FAME. In a fraction gathered by countercurrent chromatography we were able to identify 3-phenylpropionic acid (Ph-3:0), 4-phenylbutyric acid (Ph-4:0), 5-phenylpentanoic acid (Ph-5:0), 6-phenylhexanoic acid (Ph-6:0), 7-phenylheptanoic acid (Ph-7:0), 8-phenyloctanoic acid (Ph-8:0), 9-phenylnonanoic acid (Ph-9:0), 10-phenyldecanoic acid (Ph-10:0), 11-phenylundecanoic acid (Ph-11:0), 12-phenyldodecanoic acid (Ph-12:0), 13-phenyltridecanoic acid (Ph-13:0), along with one unsaturated phenyldecenoic acid (Ph-10:1) isomer. Preliminary results indicate that the aromatic fatty acids may have been formed exogenously in the rumen of the cows. The total amount of the aromatic fatty acids was estimated at 0.15 mg/g butter fat, which corresponds with an average daily intake of ~5 mg per day in Germany and ~4.4 mg per day in Europe.
Starting Page	1695
Ending Page	1702
Page Count	8
File Format	PDF
ISSN	0003021X
Journal	Journal of the American Oil Chemists' Society
Volume Number	91
Issue Number	10
e-ISSN	15589331
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cow’s milk Fatty acid Aromatic fatty acid N-phenyl-terminated fatty acid Industrial Chemistry/Chemical Engineering Biomaterials Agriculture Food Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering

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