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Enhancing the sensitivity of SPME and sorptive extraction using Peltier-cooled preconcentration technology with GC–MS analysis

Enhancing the sensitivity of SPME and sorptive extraction using Peltier-cooled preconcentration technology with GC–MS analysis

Presented at Pittcon 2020

The poster entitled “Enhancing the sensitivity of SPME and sorptive extraction using Peltier-cooled preconcentration technology with GC–MS analysis” was presented by Markes International at Pittcon, which was held on 1–5 March 2020 in Chicago, Illinois.

Enhanced sampling of aroma compounds

This study shows how the performance of GC–MS for the sampling of aroma compounds and off-odours in beverages can be enhanced by using techniques incorporating trap-based preconcentration.

The study focuses on sample enrichment to improve peak symmetry, qualitative analysis and sensitivity utilising Centri®, a fully automated multi-mode extraction and enrichment system from Markes International.

Using SPME and high-capacity sorptive extraction

First, we compare the performances of three SPME methods (direct SPME, SPME–trap and SPME–trap with enrichment) for the discovery of VOCs contributing to the aroma of tea from the headspace above a suspension of tea leaves, including an evaluation of the extraction of a set of halophenols known to cause off-odours.

We then show how the probe-based HiSorb™ high-capacity sorptive extraction technique compares with these SPME methods. In each case, all the extraction and enrichment stages are fully automated using the Centri platform, allowing the analyst to sequence multiple methods, providing the highest characterisation of the sample.

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