Factors contributing to volatile components and fatty acids in cow milk produced in Thailand

Abstract

This research, factors contributing to volatile components and fatty acids in cow milk produced in Thailand were studied. Volatile components were extracted from 10 mL milk sample by solid phase microextraction (SPME) using a carboxen/polydimethylsiloxane (CAR/PDMS) fiber at 45 ๐c for 20 min, and then quantitatively analyzed by Gas Chromatography with Flame Ionization Detector (GC- FID). The qualitative and quantitative analysis of fatty acids were analyzed by Gas Chromatography with Mass Spectrometer Detector (GC-MSD). We observed that the lactation number, lactation stage and feedstuff were the major factors contributing to the amounts of volatile components and fatty acids in cow milk. The amounts of volatile components increased at increasing lactation number, long lactation stage and com silage as feedstuff. The amount of fatty acids increased at increasing lactation number, long lactation stage and grass-hay as feedstuff. Farm environment was not found to be a major factor contributing to the amount of volatile components and fatty acids in cow milk.