Innovative Technology For Trace Organic Analysis
TEL: +44 (0)1443 230 935
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The most versatile and powerful thermal desorption unit

UNITY-xr™ is an industry-leading analytical TD instrument for the simultaneous analysis of VOCs, SVOCs and thermally labile compounds collected onto sorbent tubes.

In contrast to other thermal desorption units, UNITY-xr quantitatively re-collects samples for re-analysis or storage, enhancing sample security. UNITY-xr also features an electrically cooled cold trap, dispensing with the expense and inconvenience of liquid cryogen.

Who uses the UNITY-xr?

UNITY-xr is perfect for any laboratory needing a versatile thermal desorber for all their TD applications.


Product benefits

  • Peace of mind – with quantitative sample re-collection for repeat analysis, UNITY-xr offers simple method/data validation and overcomes the ‘one-shot’ limitation of other systems.

  • Expand your capabilities – Analyse the widest possible range of VOCs and SVOCs in a single run, including reactive and thermally labile species.

  • Reduce running costs by avoiding the need for cryogen.

  • Enhance productivity with the world’s most versatile thermal desorber – UNITY-xr offers unmatched analytical performance for the widest range of TD applications.

  • Future-proof your lab – additional modules allow automation of multiple tubes, canisters and on-line samples – making UNITY-xr the perfect platform for expansion as the needs of your lab grow.

  • Be confident – you’re using a desorber that complies with key standards such as US EPA Method TO-17.


  • Quantitative sample re-collection of all the split flows enables repeat analysis of critical samples and easy method validation.

  • An inert, optimised flow path allows quantitative recovery of C2 to C44, including reactive and thermally labile species... from percent to sub-ppt concentrations.

  • As well analysing 3½″ standard TD tubes, the UNITY-xr facilitates analysis of on-line, canister and bag samples through the modular addition of versatile accessories.

  • Rapid operation of the electrically-cooled focusing trap reduces costs and ensures fast sample throughput.

  • Method-compliance is aided by tube- and leak-testing, water management, and addition of internal standards.

  • Samples are easily tracked with barcoded tubes and RFID TubeTAGs.

  • Compatible with all major makes of GC and GC–MS.

See our video on how to replace the focusing trap on the UNITY-xr
Markes International Ltd
Gwaun Elai Medi-Science Campus
Tel: +44 (0)1443 230935
Markes International GmbH
Bieberer Straße 1-7
63065 Offenbach am Main
Tel: +49 (0)69 6681089-10
USA (West)
Markes International, Inc.
2355 Gold Meadow Way
Gold River, Sacramento
California 95670
Tel: +1 866-483-5684 (toll-free)
Markes Instruments (Shanghai) Co., Ltd
No. 1 Building, No. 7 Guiqing Road
Xuhui District
Shanghai 200233
P.R. China
Tel: +86 21 5465 1216
Part of Schauenburg International

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