The confusion in the interpretation of some aroma chemicals’ molecular structures causes confusion among the users of these products. Several important cases, including keto-enol tautomerisation of alpha-diketones, isomerisation of alpha-angelica lactone, and the exact substitution pattern of pyrazines, will be discussed. The analytical methods used to unravel the correct molecular structures were GC, GCMS and 15N-NMR spectroscopy, and particularly polarization-transfer for sensitivity enhancement (INEPT), and 2D-correlation techniques.
Solving Quality Problems In Several Flavor Aroma Chemicals
Dec 28th, 2008
