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Sampling technologies

With over 20 years of expertise in thermal desorption and sample preparation for GC, we have gained a reputation as a pioneer in the field, with a track-record of continued innovation in solving sampling challenges. Our knowledge and experience mean we know how to approach getting the best results when sampling VOCs from solids, liquids and gases.

We have an unparalleled range of products in our online shop, many of them exclusive to Markes (and compatible with instruments from other manufacturers), which are all supported by Markes’ sampling technologies, applications and service teams, who provide after-sales service and expertise on choice of sampling technique, method development and best practice. (email:

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POcket Diffusive (POD) sampler for passive sampling

The POD sampler is a radial diffusive sampler for volatile organic compounds, compatible with analysis by thermal desorption.

Compared with conventional (axial) samplers, radial samplers have a larger diffusive surface area for adsorption and a shorter diffusive pathway. This results in faster uptake rates, enabling shorter sampling times or increased sensitivity.

The POD sampler was developed in partnership with pioneers in radial sampling at the Joint Research Centre of the European Commission.

Other features:

  • Robust, easy to use, and suitable for a wide range of common volatile organic air pollutants (C4–C9)
  • Ideal for short-term diffusive sampling of low atmospheric concentrations
  • Reduced effect of environmental variables on sampling rates compared to other radial samplers
  • Can be re-conditioned and cleaned for use multiple times
  • Compatible with all commercial TD systems

Find out how the POD sampler was used in our blog “Monitoring the air we breathe with passive sampling”.

For further information, please contact our Sampling Technologies team.

Sampling technologies: Sample collection, extraction and enrichment

Meet the team

For large or complex projects, the Sampling Technologies team offers a tailored consultancy service, which encompasses engineering, sampling techniques and method development. Please contact the team by phone, email or live chat to discuss your application or project collaboration ideas. The team is led by Damien Cull, Sampling Technologies Business Unit Manager at the Markes International headquarters in the UK. For training on our products and/or applications, the Schauenberg Analytics Academy offers a range of courses, delivered by our product and application specialists (see below).

Josh holds a BSc in Analytical chemistry from the University of South Wales. He has worked in a number of ISO:17025 accredited laboratories, holding the roles of analyst and technical analyst focusing on method development using GC–MS and LC–MS.

Josh joined Markes in 2021 as the technical product specialist for the Sampling Technologies business unit. His role involves the development and validation of sampling products before release to market. The technical product specialist role also sees Josh provide technical support to customers who require help with Markes sampling products.

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As the product manager for sampling technologies, David is responsible for the continued growth and support of our product portfolio. He provides expertise in polymer science, particularly on polymer materials for improved volatile analyte extraction. He has also spent three years developing novel sorbent phases for HiSorb™ high-capacity sorptive extraction technology.




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Nick Bukowski started his mass spectrometry ('MS') career with the VG manufacturing group of companies. He held numerous MS roles including applications lab manager leading up to the company’s transition to Thermo Finnigan.

Nick managed a number of Informatics research programmes before becoming the product manager for the Thermo TEMPUS TOF system.

After a spell with Anatune in the UK, Nick joined Markes International in 2009 where he now manages cross-group product development.


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Jon joined Markes International in 2021 as an applied research scientist for the Sampling Technologies business unit. Jon holds a BSc in chemistry, a PhD in analytical chemistry (mass spectrometry) and is a Chartered Chemist (CChem) and a Fellow of the Royal Society of Chemistry (FRSC). He has over two decades of experience in mass spectrometry and has gained significant expertise in sample preparation and extraction. Jon has published over 50 peer-reviewed articles and has been involved in the development of many patented technologies.


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Training courses

We also offer training with the Schauenburg Analytics Academy, which provides fully interactive online and classroom-based courses hosted by applications and engineering specialists from Markes and SepSolve.