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Triglyceride analysis by gas chromatography in assessment of authenticity of goat milk fat

1998; Wiley; Volume: 75; Issue: 12 Linguagem: Inglês

10.1007/s11746-998-0347-6

1558-9331

Javier Fontecha, Víctor M. Díaz, M. J. Fraga, Manuela Juárez,

Natural Products and Biological Research

Abstract The triglyceride (TG) composition of 35 samples of milk collected at different times of year from five herds of goats was analyzed using short capillary column‐gas chromatography. The distribution of TG in goat milk fat was unimodal, peaking at C 40 (12.6%); the sum of TG from C 38 to C 44 accounted for about 50%, whereas the three classes of TG from C 48 to C 52 did not exceed 6% each. These results were compared with the corresponding data for cow milk fat. Significant differences between herds were observed, mainly in long‐chain TG. To detect foreign fats in goat milk fat, two multiple regression equations based on TG content of the goat milk fat were proposed. Analysis of known mixtures of tallow, palm oil, and cow milk fat with goat milk fat have experimentally confirmed the accuracy of the equations.