Sample Extraction and Enrichment

Sample Extraction and Enrichment

Sample Extraction and Enrichment
Centri sample automation and concentration platform
Centri sample automation and concentration platform
Sampling platform
Sampling platform
Tool docking station
Tool docking station
Insertion of HiSorb probe into vial
Insertion of HiSorb probe into vial
Headspace vial manipulation
Headspace vial manipulation

The Centri® platform from Markes International is the first system to offer high-sensitivity unattended sampling and pre-concentration of VOCs and SVOCs in liquid, solid and gaseous samples. Using Markes’ advanced trapping technology, Centri enhances the sensitivity and extends performance of several popular sample introduction techniques for GC–MS:

  • HiSorb™ high-capacity sorptive extraction.
     
  • Headspace and headspace–trap.
     
  • Method-compliant thermal desorption.
     
  • SPME and SPME–trap.
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WHY USE CENTRI?

  • It provides a single platform for all GC sample preparation.

  • Cryogen-free analyte trapping provides high sensitivity by delivering a sharp, concentrated band of vapour to the GC.

  • It is the only system that offers full automation of sorptive extraction, using inert HiSorb probes.

  • Sample splitting and re-collection allows repeat analysis without the need to repeat extraction steps.

  • Multi-step enrichment improves detection limits and allows: 

    • Samples resulting from different matrix modifications to be combined

    • Matrix levels to be reduced by performing several sequential short extractions, rather than a single long extraction.

  • Prep-ahead mode and automatic tool change result in increased productivity.

 

Applications

Uncovering hidden compositional changes in breath profiles using untargeted chemometric workflows
This study describes the use of thermal desorption (TD) and GC×GC–TOF MS for exploratory profiling of biomarkers in breath, coupled with innovative data mining tools to uncover hidden compositional changes using automated untargeted workflows.
Details
Reverse engineering the aroma of plant-based meat substitutes
This study describes the use of headspace sorptive extraction with GC×GC–TOF MS to compare the volatile profiles of ground meat and plant-based substitutes.
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Investigating the quality of Darjeeling teas using comprehensive VOC fingerprints
This study demonstrates the use of immersive sorptive extraction and GC×GC–TOF MS to determine the characteristic flavour compounds in Darjeeling teas. Comparative analysis of different tea types and grades will be shown using streamlined workflows to improve quality assessment.
Details

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