EST PURGE AND TRAP SYSTEM. IS 3% RSD No vial movement for water samples Separate processing areas for water and soil ARID moisture control system 3 year warranty on all electronic boards Service responsiveness of 48 hours onsite Applications Support

Enjoy the benefits of increased productivity and instrument reliability with state of the art features of the Centurion autosampler and Evolution concentrator for all your VOC purge and trap testing needs including EPA methods 8260524.2524.3, 524.4, 624, BTEX, GRO, DRO, and 5035. From waters to low level soils there’s an EST analytical solution to meet your analytical lab needs.


  • The patented ARID Moisture management System reduces sample reruns.
  • The patented Eliminator feature provides for reduced sample to sample carryover.
  • < 3% RSD programmable internal standard to mitigate sample reruns.
  • Programmable Hot water rinses in between samples.
  • Programmable soil needle depth to avoid clogging.
  • Separate water and soil needles to eliminate cross-contamination.
  • Dual mode allows two concentrators to hook up to one Centurion and one GC.
  • Optical sensors eliminate lost vial, syringe not home, and elevator errors commonly found in older purge & trap autosamplers.
  • Patented Water Prep Mode enables labs to run waters as soils to manage troublesome compounds and also save time through a single calibration.

Lost vial errors are eliminated when processing water samples by eliminating the need to move the vial to a processing station. The needle enters the sample and gas is pushed into the vial, forcing sample out into a fixed loop made of inert Peek™ material. Sample processing and rinses are over 3 times faster than other systems. Various sample sized loops are available, but 5ml is standard. All needles and tubing are large diameter to handle particulate laden samples easily. Internal standard is added to the sample and the sample is then pushed over to the sparge vessel mounted on the purge and trap concentrator. Multiple samples can be extracted from a single sample vial. Sample integrity is maintained since the needle remains in the vial until sampling for both runs is complete. After processing, the sample needle is rinsed with hot water. When the concentrator is done purging, the sample is automatically drained, and the Centurion will rinse all lines and the purging vessel with hot water. This rinse can be repeated a programmable number of times.

Due to improvements in column technology, EPA Methods such as 8260 can now be performed in about 10 minutes without sacrificing chromatographic resolution. The purge and trap cycle time has become the limiting factor to sample throughput. EST Analytical is the leading innovator in supplying several high throughput VOC solutions to environmental laboratories. The key to any of EST Analytical’s high throughput configurations is that NONE of the traditional parameters need to be altered from the recommended or stipulated parameters in EPA methodologies.

Only the Centurion series Purge and Trap Autosampler offers a built-in option which allows the autosampler to connect and control two different purge and trap concentrators. When connected to a single GC/MS, you can improve your VOC throughput up to 80 to 100 runs per day! This is equivalent to two or more conventional systems at a fraction of the cost. All sequencing is controlled by the Centurion autosampler. GC and concentrator signals are tracked to ensure nothing gets out of sequence.


  • Perform EPA methods 8260, 524.2, 524.3, 524.4, 624, BTEX, GRO, DRO with reduced carry over.
  • The Evolution is the ONLY purge and trap concentrator on the market designed to remove water during the purge process NOT during desorb and eliminates samples from being overexposed to moisture.

As detection limits have been pushed lower, and Mass Spectrometer systems more sensitive, moisture control is key to the overall stability of the complete system. Other systems collect the analytes and water on the analytical trap, then, during desorb, the sample flows through a moisture removal system on the way to the GC. When evaluating these systems, one problem became quickly apparent. If you are going to remove moisture during the desorption step when your flow is controlled by the GC, the effectiveness of this design will be determined by many different factors.

EPA methods require you to purge between 40-50ml/min of flow. As you purge, the water and VOCs travel through a Moisture Reduction Trap (MoRT) on the way to the analytical trap. This prevents a large amount of moisture from contacing the analytical trap. By using an 8-port valve instead of a 6-port valve, the sample during desorption goes directly to the GC. In other systems the sample flows through a moisture system during this step. This creates a lot of extra volume in the desorption pathway, allowing peaks to broaden, sacrificing peak resolution.

EST Analytical patented a process on the Evolution where there are two flows that go through the system during bake; one flow is directed across the trap and another separate flow goes through the glassware. Other systems actually have the bake flow travel through the trap then through the cold glassware, depositing heavy compounds on the cold glassware surface to be seen on subsequent runs. By separating the flows, the Evolution avoids this problem and by heating the sparge vessel (optional) up to 125 °C during the bake sequence, carryover is reduced dramatically.


  • Intuitive software made for the end user
  • Ability to “Rush” samples to the front
  • Up to 400:1 dilutions
  • Check on samples from any location!

The Centurion series offers a unique interface that allows the user to easily perform diagnostics and set up sequences, as well as save and load methods. The Centurion, if placed on the company network, can be operated from any PC within the laboratory. Sequences can be created with just a couple of mouse clicks.The Centurion software also incorporates a RunLog that records samples run and any errors encountered. The log can be printed or saved for later review. The Evolution comes standard with a 25cm touchscreen display. As laboratory networks have grown, there is a tendency to have the PC controlling the system further away from the actual instrument. By allowing the user to have control at the instrument, changes and troubleshooting are easier and faster to perform.

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“I would highly recommend EST! Overall surpasses their competitors with a combination of great service/support teams and reliable well thought out instrumentation.”
Technical Director
Minnesota, United States
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Pennsylvania, United States
“For my money, EST is the best in business when looking for products and support for your volatiles instrumentation needs.”
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