Application Note: LECO BT4D GCxGC comprehensive evaluation of scotch whisky

Comprehensive Evaluation of Scotch Whisky Aroma Profiles using SPME GCxGC-TOFMS

Whiskey samples are highly complex with hundreds of aroma critical species present at a wide range of concentrations and polarities amongst numerous interferences. Many species can coelute in the 1st chromatographic dimension (1D ) when using traditional GC-MS methods. As illustrated in the application note. Comprehensive two-dimensional gas chromatography ( GCxGC ) separation can significantly help to unravel this complex mixture which has low abundance aroma active species eluting amongst more highly concentrated species such as alkanes , esters, ketones, alcohols and acids, Coupled to time of flight mass spectrometry (TOFMS), which enables collections of high quality, full mass range data at fast acquisition rates (>200 Hz ), the detection and identification of these compounds is vastly improved.