Quantitative analysis of volatiles in transesterified coconut oil by headspace-solid-phase microextraction-gas chromatography-mass spectrometry

► Coconut oil and fusel alcohols are transesterified by immobilised lipase. ► Modification of oil matrix with methanol minimises SPME fibre overloading. ► Optimisation of time and temperature enables efficient SPME extraction. ► Quantification of esters is achieved by HS-SPME-GC-MS-FID.