Fatty acid and triglyceride (TG) composition of milk fat and of the six fractions obtained by AgNO 3 -TLC were determined using capillary GC. The saturated (SSS) and monounsaturated (SSM) TGs accounted with two fractions each that were separated into butyrates and all the others; the remaining fractions were identified as di- and triunsaturated TGs, respectively. The total TGs and the SSM were distributed in similar proportions with respect to chain length. The molar percentages of SSS in short- and medium-chain TGs (60.2 and 45.0%, respectively) were higher than those of polyunsaturated TGs (11.5 and 21.6%, respectively). Most of the peaks found in the chromatogram of milk fat TGs were located predominantly in one of the AgNO 3 -TLC fractions. Thirty-seven peaks were >1%; from the most important in quantitative terms, six (three SSS and three SSM) contain butyric acid and four contain three long-chain fatty acids. Eighty-one molecular species of TGs were identified.
No takes yet. Share an insight, caveat, or question.
Fraga et al. (1998) studied this question.