Innovative Technology For Trace Organic Analysis
TEL: +44 (0)1443 230 935
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The ultimate solution for monitoring polar species in humid gas samples.

Kori-xr addresses the problem of analyte loss when removing water from humid air streams, allowing high‑sensitivity analysis of polar species, oxygenates and monoterpenes in humid environments, sampled on-line or using canisters.

Who uses Kori-xr?

Kori-xr is ideal for laboratories needing to carry out on-line or canister analysis of humid air streams while avoiding the loss of polar species and ultra-volatiles that can occur with other approaches to water management.


Product benefits

  • High-sensitivity on-line analysis of C2 compounds, non-polar C3+ compounds, monoterpenes and polar VOCs in humid environments.

  • Part-per-trillion detection limits are easily achievable when used in conjunction with regular GC–quad MS.

  • Enhanced retention of the above species compared to a Nafion™ dryer or a trap temperature of 25°C.

  • Increased productivity through simultaneous analysis of very volatile organic compounds and polar & non-polar species in humid samples.

  • Improved chromatography due to rigorous removal of water.


  • An electrically cooled trap selectively removes water prior to analyte focusing.

  • Efficient water removal – Trapped water is expelled to vent from the Kori-xr trap at the same time as sample desorption from the UNITY-xr focusing trap, without increasing sampling or analysis times.

  • Compatible with UNITY–CIA Advantage-xr canister analysis systems and UNITY–Air Server-xr on-line monitoring systems. Either configuration can also include 100-tube analysis with the ULTRA-xr.



The University of York LogoKori-xr was developed in collaboration with the National Centre for Atmospheric Science (NCAS) at the University of York. It was co-funded by the UK’s innovation agency (Innovate UK), the Natural Environment Research Council (NERC) and the Welsh Government under the Knowledge Transfer Partnership program.

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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