STRATUM Purge&Trap Konzentrator

Das Nachfolgegerät des Velocity XPT ist das Purge & Trap Probenvorbereitungssystem Stratum; dieses wurde wiederum durch das Purge & Trap System LUMIN abgelöst. Ersatzteile und Service für das P&T System Stratum sind bei der ANTEC GmbH erhältlich.

Stratum Purge and Trap Concentrator

The Stratum Purge and Trap Concentrator (PTC) is a sample preparation instrument used to remove Volatile Organic Compounds (VOCs) out of aqueous and solid sample types using Helium or Nitrogen. The VOCs are deposited onto a sorbent trap which is then heated thus releasing the VOCs into a Gas Chromatograph (GC) system.

In 1974, Tekmar developed an idea that revolutionized the way laboratories performed Volatile Organic Compound (VOC) testing. Since then, Tekmar has continued to build on the foundation of the initial Purge and Trap technique one innovative layer at a time. The Stratum PTC builds on eight previous generations, making us the industry’s cornerstone of technique and support.

The fundamentals of Purge and Trap are time proven. By bubbling a purge gas through your sample matrix, the VOCs are removed and collected on an analytical trap. After the purging is complete, the trap is heated and the VOCs are released and delivered to a gas chromatograph for separation and detection. The Stratum PTC uses components that are absolutely essential to perform a successful Purge and Trap analysis; those being a mass flow controller (MFC), superior trapping technology, and inert sample pathway.

The heart and soul of our Purge and Trap System is the Teledyne Hastings Mass Flow Controller. The MFC delivers the purge gas with unmatched precision and accuracy. The most advantageous feature of utilizing the MFC is the ability to instantaneously change the gas flows and pressures at any time during the Purge and Trap process.

The Teledyne Tekmar StratTrap offers trapping benefits that have never been seen before by Purge and Trap concentrators. The StratTrap is capable of adsorbing the VOCs of interest while minimizing the collection of unwanted compounds, such as water. The ultra-fast trap heater ensures that the StratTrap is desorbed rapidly and the VOCs are delivered to the GC system quickly.

One important key to minimize carryover is the Stratum PTC’s inert sample pathway. The tubing and fittings have been treated to provide unprecedented low carryover which permits the end user to calibrate with more confidence.



Cycle Time The cycle time for the unit is 17 minutes when using an 11 minute purge time. This time also includes desorb, bake, and cool down for the Stratum PTC only and assumes ambient lab temperature. (20-22°C).
Trap Furnace Ambient to 350°C cools from 250°C to 40°C in 90 seconds or less at ambient lab temperatures (20-22°C).
6-port switching valve Ambient to 300°C actuated at 24 Volts (D.C.).
External Transfer Line Ambient to 300°C.
Sample Mount Ambient to 100°C.
Condenser Ambient to 250°C.
Sample Heater (optional) Ambient to 90°C.
Sample Pathway

All tubing and related fittings use Siltek® coating.

Gas Requirements 99.999% Helium or Nitrogen
Electronic Mass Flow Controller Device is capable of controlling flow rates between 5mL/min to 500mL/min. Each mode is independently controlled.
Device also capable of recording pressures for sample logging and automatic leak checking
Unit Dimensions Height: 19.75 inches (50.17cm)
Width: 8 inches (20.32cm)
Depth 18.5 inches (46.99cm)
Operating System PC using Windows® XP or greater
Software VOC TekLinkTM interfaced via an RS-232 connection.
Operating Conditions The system is capable of operating in Lab Temperatures between 10-30°C and humidity levels between 10-90%
Corrosion The front cover is corrosion resistant to waters within a pH range of 1-10
Voltages 100/115VAC 50/60Hz 10 amps, 1150 watts
220/240VAC 50/60Hz, 5 amps, 1150 watts
Weight 32lbs (14.5cm)
Teflon® is a registered trademark of Dupont, Windows® is a registered trademark of Microsoft, PEEK™ is a trademark of Victrex PLC, Siltek® is a registered trademark of Restek.
TekLink™ is a registered trademark of Teledyne Tekmar Company. Covered by one or more of the following patents: 7,651,866; 6,280,688 and other patent pending.


  • Environmental
  • Food and Beverage
  • Petrochemical
  • Plastics and Polymers


Inert Heated Sample Path - When dealing with active, polar, and high boiling compounds, it is imperative to keep your sample contained in an inert sample pathway. The Stratum PTC utilizes Siltek® tubing and Siltek®-treated fittings throughout the sample path. This ensures resistance to corrosion and prevents loss of compounds.

Glassware - Glassware can be ordered in 5 and 25mL with or without frit.

Guardian Foam Sensor - The sensor is mounted on the outside of the glassware thus never coming in contact with the sample.

Analytical Trap - The Stratum PTC ships with a #9 proprietary U-shaped trap installed and a U-shaped Vocarb 3000 trap. If a sample is not properly desorbed from the trap, the resolution in the chromatogram will suffer. The U-shaped trap provides superior peak shape by allowing a volume for the desorbing gas to refocus before proceeding to the GC. The result is a dramatic improvement in your chromatographic resolution.

Mass Flow Controller (MFC) - The Stratum utilizes a patented digital MFC for independent programmable flow control allowing users to easily optimize performance based on needs for either water or soil.

Ease of Operation of Maintenance –The design of the Stratum permits easy installation, monitoring and maintenance of consumable parts. Sample and gas lines are color coded for rapid identification. Internal components are carefully laid out and as a result, down time and cost of operation is kept to a minimum.

Water Management - Only Teledyne Tekmar offers the most comprehensive water management solution. The exclusive U-shaped trap and dry purge mode parameters have been optimized to dramatically reduce the amount of water being transferred to the GC column.



USEPA 502.1, 502.2, 524.2, 503.1, 601, 602, 603, 624, 8010, 8015, 8020, 8021, 8030, 8240, 8260, ASTM and Standard Methods, Massachusetts VPH and GRO Methods





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