TT24-7: Continuous monitoring of trace chemical vapours
High-performance on-line air/gas monitoring
- Highly time-resolved data – cycle times as low as 3–5 minutes if required
- Wide range of sampling flows (up to 800 mL/min) with quantitative trapping offers high sensitivity
- Dual-trap continuous monitoring – 100% data capture
- Inert, uniformly-heated flow path offers compatibility for C2–C40 compounds and reactive species
- Compatible with any make of GC(MS), fast GC, and various real-time vapour detectors
- Enhanced splitting options to accommodate high-level samples
- Sampling options include on-line air/gas analysis and tube desorption
Transportable and practical:
- Small footprint – suitable for mobile laboratories
- Operates cryogen-free – ideal for unattended remote-site operation over extended periods
- Robust and low maintenance, including minimal gas consumption
- Easy to calibrate
- Efficient desorption means no cross-contamination
- Ultra-rapid trap desorption also delivers narrow peaks, optimising sensitivity even under splitless analytical conditions; the excellent chromatographic resolution also helps eliminate false positives
- Great precision, repeatability and linearity
- Tube desorption option facilitates quantitative repeat analysis for easy validation of analyte recovery
Near-real-time monitoring, 24 hours a day, 7 days a week
Defence and homeland security
The acute toxicity of many chemical warfare agents means that near-real-time (NRT) data is often required to minimise risk to human health. The TT24-7 Series 2 is ideal for continuous unattended monitoring, and a network of systems can all be controlled from a central point.
Relevant application examples include:
- Monitoring agent stockpiles and destruction facilities
- On-site monitoring at suspected chemical incidents
- Counter-terrorism – e.g. routine monitoring of key government buildings and other strategic facilities.
Environmental and workplace air monitoring
The TT24-7 Series 2 excels in situations where the continuous monitoring of VOCs and SVOCs is required over extended periods, including:
- Priority pollutants in urban air
- Kinetic studies in atmospheric chemistry
- Chemical releases from industrial sites or in workplaces
- Environmental emergency response, including mobile laboratory installations
- Hazardous chemical processes.
Cleanroom air monitoring
Trace-level airborne contaminants in cleanroom environments can adversely affect the production of silicon wafers and semiconductors, and so are a key application of NRT systems. Tests of these systems often employ isobornyl methacrylate (IBMA), partly because of its use in hard disk drives but also because it breaks down to camphene on chemically active surfaces. Consistency in the amount of camphene arising from multiple analyses of a standard is therefore useful proof of flow path inertness.
Continuous monitoring of odour and fragrance profiles
The TT24-7 Series 2 can also be used for advanced research into emissions from consumer products – for example, to understand the decay profiles of fragrances and other compounds in air fresheners. Conversely, it can also be used to monitor fugitive odorous emissions, to ensure rapid response to industrial incidents.
Advanced technology from Markes International
Markes International pioneered high-performance cryogen-free NRT monitoring with the TT24-7 Series 1 nearly 10 years ago. With its track record of robust, low-maintenance field operation, the TT24-7 Series 1 brought research-grade analysis to the front line of agent monitoring in challenging, out-of-lab environments.
Now the TT24-7 Series 2 builds on the success of its predecessor, offering an advanced feature set that extends the application range. Key enhancements are:
- Optimised trap cooling for enhanced retention of more volatile compounds
- Improved serviceability makes trap changes easier
- Faster cooldown rates allow faster cycle times
- Inert and uniformly heated inlet line
- Smaller footprint for mobile laboratories
- Quantitative tube desorption and re-collection for repeat analysis/validation.