UNITY 2, Markes next generation thermal desorber, harnesses every technical innovation of the last ten years and incorporates every feature required for TD compliance. It provides the perfect platform for a state-of-the-art yet robust range of thermal desorbers with systems available at prices to suit every budget. 

UNITY 2 main features: Either 3.5-inch (standard) or 4.5-inch (DAAMS*) tubes format Compatible with electronic tagging (TubeTAG™) for recording tube history Single platform for all TD applications Sample re-collection(SecureTD-Q)for repeat analysis Cryogen-free: Enhanced electrical cooling retains acetylene from up to 1.5L of air Method compliant including stringent leak testing Fully upgradeable to multi-tube, multi-canister, headspace and/or on-line automation Optional electronic control of gas flows – split, desorb flow, etc. Aids method resettability and stabilises retention times UNITY 2 adds to any commercial GC(MS) and is designed for easy maintenance Time saving overlap mode allows desorption of a subsequent sample to begin while GC analysis of a previous sample continues. * DAAMS: Depot Area Air Monitoring System as used in some chemical agent destruction facilities

Universal TD platform for all applications 

UNITY 2 is a full functionality, single tube, two-stage desorber operating cryogen-free and offering unlimited upgrade routes. It offers unique application versatility:

• Compatibility with reactive analytes which requiring low flow path temperatures (e.g. mercaptans, CW agents and explosives)
• Uniquely effective cryognen-free retention of ultra-volatiles such as acetylene from over 1.5 L of air (Boosts sensitivity for key on-line air monitoring applications such as ozone precursors)
• Quantitative of high boilers such as phthalates, 5/6 ring PAHs and n-C₄₀
• Simultaneous analysis of volatiles and semi-volatiles.
• Direct desorption of materials as well as desorption of sorbent tubes
• Accessories available for interfacing headspace samples, canisters, bags and on-line air/gas streams

Quantitative recovery of analytes from sample tubes can be validated using SecureTD-Q (quantitative re-collection for repeat analysis) per standard methods 

Error-free sample tracking with TubeTAG 

Electronic tube tagging and tracking allows individual TD samples to be tracked from the laboratory to field and within a laboratory.
UNITY 2 can be used to analyse tagged tubes (tags do not have to be removed). This allows a tag to remain on the same tube indefinitely, allowing it to record tube history and track performance. 


Multiple tube sizes 

UNITY 2 is available in two configurations:

• Standard - compatible with 3.5-inch long x 1/4–inch O.D. tubes in glass, stainless steel or inert-coated stainless steel
• DAAMS tube – compatible with 4.5-inch tubes: both 6 mm O. D. and 100 mm O.D. tubes with 6 mm ends.

Kits are available for easy interchange between the 2 different UNITY 2 configurations.

Sample re-collection: SecureTD-Q

• Optimum detection limits via splitless operation. The UNITY cold trap is so efficient that it is capable of splitless operation with high-resolution capillary chromatography.
  
• Single/double split operation for high concentration industrial monitoring and the analysis of % level volatiles in materials. Split ratios in excess of 10,000:1 can be achieved if required. 

Optional electronic carrier gas control (ECC)

Markes TD systems harness back-pressure-regulated electronic carrier gas control (ECC) available on leading brands of GC to control carrier gas flow through the entire TD-GC(MS) system. This stabilises retention times, independent of TD method parameters and enhances confidence in component identification/quantification. ECC is complemented by the MFC accessories available for control of split and desorption flows on UNITY 2. 


Enhanced accessibility and ease-of-use 

• Easy-change focusing trap
• Low dry air/N₂ consumption
• Fast trap cool down
• Negligible air/water background
• Overlap mode for maximum productivity
• Negligible artefacts and <0.1% carryover
• Intuitive control via software loaded onto same PC as GC(MS) control