Markes Thermal Desorption Systems

Markes TDS Applications

• The Markes UNITY-xr is a Single-tube thermal desorption unit, that provides state of the art functionality and analytical performance for individual sorbent or sample tubes plus upgrade flexibility for tube, canister and on-line automation. It’s perfect for research laboratories, labs with low throughput requirements and those wanting to explore the business potential of thermal desorption for the first time.
• The Markes UNITY–ULTRA-xr is an automated Multi-tube thermal desorption system for the rapid and unattended processing of up to 100 sorbent tubes in a single sequence. It is the ideal platform for high-throughput laboratories requiring the flexibility to expand their capabilities to extended analyte ranges and varied sample types while maximizing sample throughput.
• The Markes UNITY–CIA Advantage-xr is a Cryogen-free, automated canister and whole air preconcentration system for the analysis of VOCs in canisters and bags. It’s the ultimate system for high-throughput laboratories running the canister-based methods US EPA TO-15/TO-15A and Chinese EPA HJ 759. It is also ideal for analysts needing a versatile TD system able to handle other whole-air samples, as well as sorbent tubes.
• The Markes UNITY–Air Server-xr is a Cryogen-free automated thermal desorption system for unattended on-line air monitoring, that introduces a controlled flow of sample directly into an integral focusing trap, allowing automated on-line analysis of VVOCs and VOCs in air or gas. It’s ideal for round-the-clock air monitoring of volatiles such as PAMS ozone precursors and odorous species, especially in remote locations where unattended sampling at time specific intervals is necessary. 

UNITY-xr Benefits  

• Compatible with a wide range of compounds and applications from acetylene to n-C44 plus reactive species, at levels from ppt to percent.
• Trouble-free operation is ensured through easy user access for tube loading/unloading, a compact footprint that fits any GC or GC–MS platform, and efficient electrical cooling of the easychange focusing trap for optimal performance without cryogens.
• Outstanding performance is delivered by UNITYxr as the only manual thermal desorber that enables quantitative sample recollection, ensures full compliance with international TD method recommendations, and maximizes data confidence through an inert flow path and backflush trap desorption.
• Future-proof systems certified for use with helium, nitrogen and hydrogen carrier gases.
• Easy upgrades are available through modular expansion options that add highcapacity tube or canister automation and continuous online air or gas monitoring as your requirements grow. 

UNITY–CIA Advantage-xr Benefits

• Maximum instrument uptime is achieved through cryogenfree trapping, DryFocus3™ water removal and an inert, uniformly heated flow path that eliminates carryover and reduces downtime.  
• Versatility is delivered through low-volume loop sampling and MFC sampling for both highconcentration and tracelevel samples, with compatibility across all sample types, GC/GC–MS systems and fastGC methods.  
• Futureproof investment is ensured by expandable canister capacity from 14 to 27 positions and standard TO17compliant tube desorption with upgradeability to 100tube automation.

UNITY-AIR Server-xr Benefits

• Cryogen-free operation, fast cycle times and automated sequencing between at least three channels (sample, standard, blank) minimise user intervention and deliver optimum data coverage.
• Best-available sensitivity due to quantitative retention of C2 hydrocarbons from up to 1 L of air and fast trap desorption.
• Versatile and robust performance by mass-flow controlled sampling, splitless and high-split options extending concentration range, maintaining full inertness for challenging analytes, and offering method-compliant tube desorption as standard.
• Sophisticated water management, such as permeable membrane dryers and Dry-Focus3™ cryogen-free drying option.  
• Future-proof systems certified for use with helium, nitrogen and hydrogen carrier gases. 

Markes TDS Downloads 

Markes Ebook What is thermal desorption

Markes UNITY xr brochure

Markes ULTRA xr brochure

Markes UNITY CIA Advantage xr brochure

Markes UNITY Air Server xr brochure