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A simplified protocol for fatty acid profiling of milk fat without lipid extraction
- Liu, Zhiqian, Moate, Peter, Rochfort, Simone
- International dairy journal 2019 v.90 pp. 68-71
- centrifugation, chloroform, fatty acid composition, fatty acids, methylation, milk fat, protocols, raw milk, solvents, toxicity, transesterification
- Determination of the fatty acid profile of milk fat generally involves a protocol that comprises total lipid extraction, transesterification and GC analysis. The lipid extraction step is time-consuming and often employs toxic solvents such as chloroform. A novel protocol is presented here that skips the lipid extraction step and allows the determination of fatty acid composition via direct methylation of milk fat isolated after centrifugation of raw milk. This new method is reliable for relative quantification of fatty acids in raw milk fat and offers a much higher throughput compared with the classical methods.