Animal and vegetable fats and oils. Determination of isolated trans isomers by infrared spectrometry

aceites animales aceites vegetales animal fats animal oils beurre végétal corps gras animal espectroscopia infrarroja grasas animales grasas vegetales huile animale huile végétale infrared spectrophotometry isomerización isomerization isomérisation normas norme plant fats plant oils spectroscopie infrarouge standards