Entech Instruments, Inc. products

Vacuum Assisted Sorbent Extraction (VASE) is a next generation extraction technique capable of greatly extending the range of extractable compounds over other headspace or even full immersion techniques. Virtually all liquid and solid samples to be analyzed by GC or GCMS are compatible with this exciting technique that was recently made even better by modifying the presentation of the Sorbent Pen to the vacuum headspace that completely prevents the deposition of aerosols on the outside of the Sorbent Pen during rapid agitation. Aerosol contamination is a known issue with  HSSPME and other headspace techniques where splashing of the sample can lead to the deposition of non-volatile compounds on the extraction device, shorting the lifetime of these devices and increasing the production of thermal breakdown products that can be hard to distinguish from compounds that were actually in the original sample.

Flash-VASE is a next generation Thermal Extraction technique that places the sample in very close proximity to the collection sorbent, and uses static extraction under vacuum to more efficiently and completely recover volatile through semi-volatile compounds. Flash-VASE places the sample within a few centimeters of the collection sorbent, with no flowing gases to heat up the sorbent during the extraction which is a known problem with dynamic headspace techniques, so the collected compounds stay optimally close to the front of the sorbent bed for fast and complete release to the GC. Extraction under a vacuum allows recovery of chemicals at a lower temperature, reducing or avoiding breakdown of the matrix itself. Flash-VASE has a tremendous number of advantages over other thermal extraction techniques, allowing Chemists to truly “See What’s Really There™”, in a way that keeps the analytical system clean and free from carryover.