Enhanced aroma profiling of vodka using automated immersive high-capacity sorptive extraction with GC–MS

Key benefits include full automation on the Centri multi-mode sampling and concentration system, re-collection for repeat analysis of a single sample under different conditions, and selective purging of ethanol.

Introduction

Historically, a wide variety of sampling methods have been used to extract volatiles from alcoholic spirits, with a key driver being the need to improve upon inefficient solventextraction methods.

One such improved method is HiSorb™ high-capacity sorptive extraction, which is highly efficient sampling approach for a wide range of applications. It involves use of robust, inert metal probes fitted with a relatively large volume of PDMS sorptive phase (see boxed text on next page), allowing high sensitivity to be achieved. Following headspace or immersive sampling, the probes are automatically rinsed, dried and desorbed, with the analyte vapours then concentrated on a focusing trap prior to GC–MS injection.