Thermal Desorption

TD100-xr automated thermal desorption unit

UNITY-xr thermal desorption unit

UNITY-Air Server-xr thermal desorption unit

UNITY-ULTRA-xr automated thermal desorption unit

UNITY-CIA Advantage canister autosampler and preconcentrator

Kori-xr water management unit

Thermal desorption (TD) uses heat and a flow of inert gas to desorb VOCs and SVOCs from sorbents or sample materials. Extracted vapours are swept onto an electrically-cooled sorbent-packed focusing trap, which is then rapidly heated. This injects the vapours into the GC in a narrow band, providing outstanding levels of sensitivity.

SepSolve is pleased to be able to offer the full range of TD instruments from Markes International, which offer wide analyte range (from acetylene to C₄₄), quantitative re-collection of split flows, and outstanding sensitivity enhancements.

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Why use thermal desorption?

Key amongst these are the 100-tube fully-automated TD100-xr™ thermal desorber, the single-tube UNITY-xr™ instrument, the multi-canister CIA Advantage-xr™ system, and the continuous near-real-time TT24-7™ instrument. We also offer the fully automated Centri^® sample preparation platform, which features a 50-tube TD module alongside other sample introduction options. All of these use electrical cooling to avoid the inconvenience of liquid cryogen.

Applications

Improved characterisation of malodours in recycled plastics using TD–GCxGC with BenchTOF2 MS

Thermal desorption (TD) with GCxGC–TOF MS can be used for comprehensive characterisation of volatiles from recycled plastics, and the method is simple to translate to routine screening in QC labs.

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Discovery of biomarkers in breath: Enhancing separation and identification using GCxGC–TOF MS

This study describes the comprehensive, high-sensitivity screening of disease biomarkers, through use of sampling onto TD tubes, automated preconcentration, and GCxGC–TOF MS, with confident identification aided by Tandem Ionisation.

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Discovery of biomarkers in breath: Efficient screening with TD–GC–TOF MS

This study describes an analytical system for the rapid identification of potential disease biomarkers in breath, through the use of sampling onto TD tubes, followed by automated preconcentration and GC–TOF MS.

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Discovery of biomarkers in breath: Development and optimisation of a TD–GCxGC–TOF MS analytical platform

This study describes the development of an analytical platform based upon TD–GCxGC–TOF MS and shows its application to the collection and analysis of breath samples. The enhanced separation achieved ensures confident identification of biomarkers.

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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.

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Comparison of the aroma profiles of hops using dynamic headspace sampling with TD–GC–TOF MS

This study demonstrates the high performance of a dynamic headspace sampler with TD–GC–TOF MS analysis for investigating the complex aroma profiles from three varieties of hops.

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Routine monitoring of airborne VOCs using TD–GCxGC–TOF MS/FID

This study demonstrates the suitability of a TD–GCxGC system with dual TOF MS/FID detection for the routine, automated analysis of VOCs in complex humid air samples.

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Aroma profiling of pet food using high-capacity sorptive extraction and TD–GCxGC–TOF MS

This study demonstrates the use of high-capacity sorptive extraction, with analysis by TD–GCxGC–TOF MS, for the aroma profiling of meat-based cat food, including the reliable detection of trace off-odour components.

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Rapid aroma-profiling of cookies by dynamic headspace sampling and TD–GC–TOF MS

This study shows the value of dynamic headspace sampling and thermal desorption–GC–TOF MS analysis to rapidly profile volatile compounds released from flavoured cookies, and avoid the problems typically encountered when using solvent-extraction methods.

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Analysis of odours and emissions from automotive textiles and trimmings by thermal desorption with GCxGC–TOF MS

Demonstrating the use of direct desorption of various textiles and trimmings prior to analysis by thermal desorption (TD) and comprehensive two-dimensional gas chromatography with BenchTOF2™ time-of-flight mass spectrometry (GCxGC–TOF MS) to identify malodours and compounds of potential concern.

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