Analysis oftrans-18:1 isomer content and profile in edible refined beef tallow (original) (raw)

Abstract

The_trans_ 18:1 acid content and profile for several samples of edible refined beef tallow were determined monthly over a period of one year. For this purpose, gas-liquid chromatography was combined with silver-ion thin-layer chromatography. The mean content of_trans_-18:1 isomers was 4.9±0.9% (_n_=10) of total fatty acids with a minimum of 3.4% and a maximum of 6.2%. The distribution profile of individual isomers was also established. As in other ruminant fats (milk fat, meat fat), the main isomer is vaccenic (_trans_-11 18:1) acid. Other isomers, with their ethylenic bonds between positions 6 and 16, were found in lesser amounts. However, some slight but definite differences exist between beef tallow and cow milk fat. The relative proportion of vaccenic acid is higher in the former than in the latter. However, the distribution pattern of_trans_-18:1 isomers in beef tallow closely resembles that in beef meat fat (lean part).

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Authors and Affiliations

  1. ISTAB, Laboratoire de Lipochimie Alimentaire, Universite Bordeaux 1, Allée des Facultés, 33405, Talence, France
    Corinne C. Bayard & Robert L. Wolff

Authors

  1. Corinne C. Bayard
  2. Robert L. Wolff

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Bayard, C.C., Wolff, R.L. Analysis of_trans_-18:1 isomer content and profile in edible refined beef tallow.J Amer Oil Chem Soc 73, 531–533 (1996). https://doi.org/10.1007/BF02523932

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