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Sampling Technologies

Sorbent tubes - stainless steel

Markes’ stainless sorbent tubes are available in two sizes: 3.5” x ¼” (industry-standard), and 4.5” x 6mm (DAAMS). Industry-standard tubes are compatible with Markes, PerkinElmer, Shimadzu, Dani, CDS and Gerstel 3.5+ thermal desorption (TD) systems.

Tubes can be provided empty, packed with a single sorbent bed for active or passive sampling, and multiple sorbent beds for active sampling of an extended hydrocarbon range. Tubes are sold conditioned and capped with long-term storage caps, or unconditioned without caps.

To see all industry standard sorbent tubes we sell use our tube selector.

All Markes’ sorbent tubes are permanently labelled with a unique serial number, barcode and sampling arrow for ease of use and tracking.

Types of stainless steel sorbent tube

  • General use – Single and multi-bed tubes with broad analyte ranges, suitable for general use and sampling of unknown and/or known compounds. Versatile and robust, making them ideal for everyday use.
  • Method compliant – Single and multi-bed tubes designed to be compliant with methods such as EPA TO-17. Purchased conditioned, they minimise preparation time and provide confidence in results.
  • Application optimised – Single and multi-bed tubes optimised by Markes for specific applications such as bio-monitoring, material emissions testing, air sampling in hydrophobic environments and SVOC monitoring. Optimised by TD experts to streamline method development and minimise downtime.
  • Single-sorbent – Popular tubes packed with a single sorbent bed. Packed by TD experts with optimised mesh sizes, bed lengths and packing methods for pumped and passive sampling.
  • Multi-bed – Popular tubes packed with multiple sorbent beds: typically, two or three. Optimised combinations of mesh size, mass, and sorbent combinations for effective pumped sampling. Allow for sampling of extended analyte ranges on a single tube, reducing costs and simplifying workflow.
  • Custom – Custom-packed single or multi-bed tubes specifically configured to suit your requirements. Further options include custom laser-etching, banding, and RFID-tagging (TubeTAG™).
  • Empty – Empty tubes for direct desorption of homogenous solid or semi-solid materials, for advanced users with their own sorbent packing expertise and equipment, or to be used as carrier tubes.
  • SafeLok™ tubes– With diffusion-locking SafeLok options for additional peace of mind, or for sampling at low flow rates.