Novel use of automated sample re-collection for extending dynamic range

ALMSCO International has published an application note titled "Accurate & reliable analysis of beer using time-of-flight technology for gas chromatography". The application note describes the novel use of automated re-collection (SecureTD-Q) for extending dynamic range as applied to the analysis of beer. The application note discusses the use of Markes' SPE-tD cartidges for sorptive extraction followed by thermal desorption-GC/MS using the UNITY thermal desorption system.

Making use of the UNITY flow splitting and sample re-collection facility, "high/low" analysis of the beer is undertaken. A double-split method "dilutes" the sample to characterise the high-abundance components. Simultaneous sample re-collection on the UNITY thermal desorption system enables follow-up analysis of the same sample using a single split to load more sample onto the column. This provides accurate measurement of the minor components of the beer.

The full application note can be downloaded from the ALMSCO International website

* ALMSCO International is a division of Markes International Ltd