Immersion Vs. Headspace SPME Sampling of Whiskey

Solid Phase Micro Extraction is a non-exhaustive sampling technique in which a coated fiber is exposed to a sample, the analytes of the sample adhere to the fiber and the fiber is then desorbed onto a Gas Chromatograph coupled to a detector for separation and analysis. There are two types of SPME sampling techniques. The first entails bringing a sample to equilibrium and exposing the SPME fiber to the headspace of the sample. The second involves placing the SPME fiber directly into the liquid phase of the sample and allowing the analytes to adhere to the fiber directly from the sample. This application note will examine both SPME sampling techniques using Whiskey samples.