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 C40 (12.6%); the sum of TG from C38 to C44 accounted for about 50%, whereas the three classes of TG from C48 to C52 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Precht, D., Qualitätseinstufung und Schnelle Jodzahlbestimmung von Butterfett anhan einer Triglyceridanalyse, Z. Lebens. Unters. Forsch. 187:457–462 (1988).
Alonso, L., Capillary Gas Chromatography of Some Triglycerides in Cheese Using Programmed-Temperature Injection, Chromatographia 35:649–652 (1993).
Kalo, P., and A. Kemppinen, Mass Spectrometric Identification of Triacylglycerols of Enzymatically Modified Butterfat Separated on a Polarizable Phenylmethylsilicone Column, J. Am. Oil Chem. Soc. 70:1209–1217 (1993).
Cerbulis, J., O.W. Parks, and H.M. Farrell, Composition and Distribution of Lipids of Goats’ Milk, J. Dairy Sci. 65:2301–2307 (1982).
Luf, W., A. Stock, and E. Brandl, Detection of Foreign Fat in Milkfat by Means of Triglyceride Analysis. I. Triglyceride-Composition of Austrian Milkfat—Seasonal and Regional Fluctuation, Oesterr. Milchwirtsch. 42:23–28 (1987).
Precht, D., Control of Milk Fat Purity by Gas Chromatographic Triglyceride Analysis, Kiel. Milchwirtsch. Forschungsber. 43:219–242 (1991).
Contarini, G., R. Leardi, C. Pezzi, and P.M. Toppino, Valutazione della Genuinità del Burro mediante Analisi di Trigliceridi ed Acidi Grassi, Riv. Ital. Sostanze Grasse 70:491–499 (1993).
Juárez, M., Test for Fraudulent Identification, in Proceedings of the XXIII International Dairy Congress, Int. Dairy Fed., Montréal, 1990, Vol. 2, pp. 1285–1300.
Reference Method for the Detection of Foreign Fats in Milk Fat by Gas Chromatographic Analysis of Triglycerides, Commission of the European Communities, Doc. VI/2648/94, 1994.
Timms, R.E., Detection and Quantification of Non-Milk Fat in Mixtures of Milk and Non-Milk Fats, J. Dairy Res. 47:295–303 (1980).
Luf, W., A. Stock, and E. Brandl, Detection of Foreign Fat in Milkfat by Means of Triglyceride Analysis. II. Detection of Milkfat Adulteration by Means of Triglyceride Combinations, Oesterr. Milchwirtsch. 42:29–35 (1987).
Precht, D., Detection of Foreign Fat in Milk Fat. I. Qualitative Detection by Triacylglycerol Formulae, Ibid.:1–8 (1992).
Precht, D., Detection of Foreign Fat in Milk Fat. II. Quantitative Evaluation of Foreign Fat Mixtures, Ibid.:107–114 (1992).
Lund, P., Analysis of Butterfat Triglycerides by Capillary Gas Chromatography, Milchwissenschaft. 43:159–161 (1988).
Lozada, L., M.A. de la Fuente, J. Fontecha, and M. Juarez, Considerations of the Quantitative Aspect of the Determination of Milkfat Triglycerides with Split PTV and On-Column Injection, J. High Resolut. Chromatogr. 18:771–775 (1995).
BMDP Statistical Software, Inc., Los Angeles, CA 90025 (1993).
Sauvant, D., and P. Morant-Fehr, Interactions Alimentation entre Individus en Production Laitière Caprine. 6ème Journée INRA-ITOVIC (1981).
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Fontecha, J., Díaz, V., Fraga, M.J. et al. Triglyceride analysis by gas chromatography in assessment of authenticity of goat milk fat. J Amer Oil Chem Soc 75, 1893–1896 (1998). https://doi.org/10.1007/s11746-998-0347-6
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11746-998-0347-6