Innovative Technology For Trace Organic Analysis
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World-leading technology for automated tube desorption

UNITY–ULTRA-xr™ is a high-throughput, automated thermal desorption system for the rapid, unattended analysis of up to 100 sample tubes in a single sequence.

Who uses the UNITY–ULTRA-xr?

UNITY–ULTRA-xr is ideal for laboratories needing to:
  • Process large numbers of tube-based samples automatically

  • Looking to upgrade their existing single-tube UNITY-xr

  • Needing to add automated tube analysis to their existing Markes canister system.

Product benefits

  • UNITY-ULTRA-xrEnhance throughput – Capacity for up to 100 tubes and the use of sample overlap allow you to maximise productivity, e.g. unattended operation all weekend.

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

  • Expand your capabilities – Not only does TD100-xr allow you to analyse the widest possible range of VOCs and SVOCs in a single run, but sample stacking increases sensitivity, and the unbeatable split range (splitless to 125,000:1) enables both high-concentration and trace-level samples to be analysed on the same instrument.
  • Reduce running costs by avoiding the need for expensive and hazardous cryogen, and the associated risk of ice blockage of the flow path.

  • Secure and reliable – Tubes remain capped at all times, thereby making automation mechanically simple and avoiding sample contamination and/or analyte loss.

  • Simplify chain of custody and reduce errors with the on-board TubeTAG read/write functionality, which automatically updates tube and sample information during analysis.

  • Easy and intelligent operation – With built-in parameters for several standard methods, automated self-checking diagnostics, and usage/maintenance counters, you can quickly and easily get going and keep going.

  • Future-proof your lab – Adding further modules to the UNITY–ULTRA-xr allows automation of canisters or on-line samples, as well as extending tube automation up to 199 samples.

  • Be confident – You’re using a desorber that complies with key standards set out by numerous regulatory bodies, including US EPA, Chinese EPA, CEN, ISO, ASTM, HSE, JSA, NIOSH, and more.



  • Automated, cryogen-free, unattended operation for up to 100 sample tubes.

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

  • Robust design accommodates industry-standard 3½″ tubes.

  • Stacking of multiple tube samples on the focusing trap increases sensitivity for samples restricted by breakthrough or time limitations.

  • An inert, optimised flow path allows quantitative recovery of C3 to C44, including reactive and thermally labile species... from percent to sub-ppt concentrations.

  • Rapid operation of the electrically-cooled focusing trap reduces costs and ensures fast sample throughput.
  • Method compliance is aided by leak-testing, water management and addition of internal standards.

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

  • Advanced software control – Markes Instrument Control (MIC) is only software designed specifically for thermal desorption users. Get the most out of your instrument with components such as automated intelligent diagnostics, leak isolation, usage/maintenance counters, rapid method set-up and customisable limits.

See our video on how to load sorbent tubes into an ULTRA-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
Unit 1002, Building 1
No.418, Guilin Road
Shanghai 200233
P.R. China
Tel: +86 21 5465 1216
Part of Schauenburg International

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