Introducing Entech’s new solvent-free Sorbent Pen™ headspace solution. The most versatile extraction and sample preconcentration technology available for GC and GCMS systems. Sorbent Pens™ combine the features of SPME and classical ¼” adsorbent traps in a design with far more flexibility and enhanced performance. The Sorbent Pen™ uses an entirely new approach for sample extraction. Direct insertion of the Sorbent Pen™ through a gas tight liner in the vial allows for a new technique called “Vacuum Assisted Sorbent Extraction”, or VASE, to recover a far wider range of compounds than ever before. Drawing a vacuum of 30x below atmosphere through the pen’s unique micro-valve allows for a more thorough and rapid equilibration to occur in the vial headspace. With 150x the phase loading of SPME, and a durable, ultra-inert Silonite treated steel enclosure, the Sorbent Pen can perform exhaustive extraction and more fully recover light to heavy compounds with improved sensitivity and reproducibility.
VASE offers a tremendous advantage over other extraction techniques that perform extractions at atmospheric pressure where diffusion rates are suppressed. Sorbent Pens™ perform sample enrichment offline from a GCMS, allowing all samples to extract simultaneously and for longer periods of time. This approach results in high throughput while yielding a more complete and reproducible extraction for more sensitive and quantitative measurements. The low cost 5800 Sorbent Pen™ Desorption Unit (5800 SPDU) makes this exciting new technique both affordable and practical for virtually any laboratory’s budget. Upgrade to 90 sample automation with either the Entech PAL2 system retrofit kit or the Entech 7800 Autosampler for the ultimate in laboratory productivity. Join the Sorbent Pen™ movement and take advantage of the next generation in GCMS sample preparation!
Operating at or near equilibrium increases sensitivity and reduces run to run variability. Small shifts back and forth on the VASE curve as the samples approach equilibrium causes little change in the recoveries. Because equilibrium is always reached, VASE will always be more reproducible.
Highly reproducible. Very Low Carryover.
Durable – hundreds of injections.
Operates at or near equilibrium to improve sensitivity and quantitative accuracy.
Perform exhaustive vacuum extraction of VOCs through SVOCs.
Unlike SPME, outer sheath minimizes exposure to aerosols formed during agitation.
See taints, odors, additives, flavors & fragrances at levels below previously possible.
Faster injection rates produce better chromatography / less thermal degradation.
Rapid injections without cryogen or electronic cooling.
Usually requires no secondary bakeout/cleanup.
Sample up to 2 days under vacuum for unsurpassed SVOC recovery.
Sample at elevated or sub-ambient temperatures as needed.
Entech has created an upgrade package to convert existing PAL-2 systems into a VASE compatible automation solution. The CTC PAL-2 offers precise and intuitive sample handling capabilities, and with thousands of installations world-wide, provides for a turn-key platform to transition into the VASE method at a very low entry cost.
The Entech PAL-2 VASE upgrade kit enables the conversion of existing SBSE, Dynamic Headspace, and SPME outfitted systems to become fully compatible to handle Headspace Sorbent Pens. Up to 90 pre-extracted samples can be placed into sample trays for continuous analysis on most late model GC/MS configurations.
Introducing Entech’s exciting new Sorbent Pen™ technology. The most versatile extraction and sample preconcentration technology available for GC and GCMS. Sorbent Pens™ combine the features of SPME and classical ¼” adsorbent traps in a design with far more flexibility and enhanced performance.