Información técnica |
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Aplicaciones |
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Desorción Térmica ( Thermal Desorber) UNITY
ULTRA ®UNITY can be simply upgraded by the addition of ULTRA - for the automatic desorption of up to 100 industry standard tubes. The slimline design consists of 10 trays each containing up to 10 tubes. The combined ULTRA-UNITY™ system occupies only 16 inches of bench space. All key UNITY features - analyte range, sample protection, split flexibility, etc. - are maintained on systems upgraded with an ULTRA autosampler.
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- Uniquely featuring SecureTD™ for quantitative repeat analysis and method development / validation
- Cryogen-free operation
- Splitless desorption with high resolution capillary GC(-MS)
- Uses industry standard, re-usable sample tubes
- Uncompromised analytical performance and wide application range
- Stringent leak test without compromising sample integrity
- Compatible with any commercial GC(-MS) and other vapour analysers, Enose, process MS etc.
- Upgradeable to multi-tube, multi-canister or on-line automation
- Complies with the requirements of US EPA Method TO-17, ISO 16017, ASTM D6196 and other international standard methods
Thermal Desorption Systems and Solutions
Increased awareness of the impact of VOCs on the environment and on consumer acceptance of a wide range of products - food/drink, building products, cleaning materials etc. - has increased the need to measure these compounds at lower and lower levels. This, in turn, has led to increased demand for thermal desorption to automate, simplify and enhance the sensitivity of GC(-MS) analytical methods. Markes International Thermal Desorption (TD) systems combine state-of-the-art performance, with a broad range of sampling devices and SecureTD™ - a unique feature for repeat analysis of thermal desorption samples. A number of automation options, offering unattended operation with multiple tubes, canisters or continuous sampling of on-line air/gas streams, are available
Unity™ - Platform thermal desorber for single tubes
Further information on manual, automated and on-line thermal desorption systems from Markes International is given in the associated system brochure “UNITY, ULTRA, Air Server - thermal desorption systems”
- Extends UNITY operation to automated analysis of up to 100 industry standard desorption tubes
- Tubes sealed before and after analysis using patented* DiffLok caps
- No uncapping or re-capping required
- Retrofits to any UNITY
- A second UltrA autosampler may be added if required to automate the SecureTD (re-collection for repeat analysis) process.
UltrA TD™ Multi-tube Autosampler
Unique Sealing Caps
· Patented DiffLok™ Caps
Tubes on the ULTRA autosampler are sealed with DiffLok caps to preserve sample integrity. DiffLok caps provide an effective tube seal until pressure is applied causing gas to flow.
· No Loss Of Sample Or Ingress Of Contaminants
DiffLok caps maintain the integrity of both sampled and cleaned tubes via a unique diffusion limiting design. Tubes sealed with DiffLok caps show negligible ingress of contaminants or loss of sampled components over time. The cap on the sampling end of the tube has an inert coating to prevent breakdown of labile compounds.
Simple Reliable Operation
· No Cap Removal
As DiffLok caps do not need removing or replacing during analysis, the system offers unrivalled reliability.
· Minimal Mechanical Movents
With a total of 4 linear movements each capped tube in turn is lifted into the single desorption oven and sealed into the carrier gas flow path.
· Low Maintenance
The self-aligning, cone-shaped tube receivers provide a robust gas-tight seal while minimising o-ring wear. O-ring seals last for many thousand operations and are readily accesible for user exchange.
Air Server™ and Multi-Channel Samplers (MCS06™& MCS08™)
· Extend UNITY sample range to include canisters and continuous on-line air/gas monitoring as well as tubes
· Sophisticated electronic control of sampling flow and time integrated into system software
· Ideal for unattended field or on-plant operation
· Automatic sequencing between up to 8 canisters or on-line air / gas streams
Sensor arrays have long offered the promise of rapid characterisation of materials from the overall profile of organic compounds in the vapour phase. Fast analysis times combined with reduced size and complexity can make them a better choice for process monitoring and quality control when compared to traditional GC methods.
However, exploitation of these benefits has, until now, been hampered by their inherent susceptibility to saturation by compounds such as water and their general lack of sensitivity.
These limitations can now be overcome using UniSense™ which combines an advanced micro-cell sensor with an on- or off-line adsorbent trap. Samples may be analysed by GC(-MS) running in parallel with the sensor array to qualify sensor response during method development.
Further information on manual, automated and on-line thermal desorption systems incorporating Enose sensors is given in the associated system brochure "UniSense SensorTive Analys
