รายละเอียดเอกสาร

DEFINITION This method provides a Fourier transform infrared (FTIR) spectroscopic procedure for the rapid (5 min) determination of the total isolated trans fat content (as percent of total fat) of vegetable, animal, dairy, ruminant, and marine fats and oils. The fats and oils are measured by FTIR in the attenuated total reflection (ATR) mode (References 1 and 2). This method does not require any derivatization of the oil or fat test materials to their corresponding FAMEs. It also does not require any weighing or quantitative dilution of unknown test samples in any solvent. SCOPE The method is applicable to neat (undiluted in any solvent) fat and oil test samples of crude, refined, partially or fully hydrogenated products derived from vegetable, animal, dairy, ruminant, or marine sources. This method is suitable for the analysis of isolated trans fat and oil products containing or supplemented with trans conjugated linoleic acid (CLA) isomers that exhibit absorption bands near 990, 984 and 950 cm–1.