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. This technique is standard for many EPA Methodologies as well as analytical options where concentration of VOCs is required. Teledyne Tekmar has been the leader in this technology since its first PTC was released in the 1980s. Tekmar​ has continued to improve on this technique through eight generations of systems including the Stratum PTC to meet the ever increasing analytical challenges faced by laboratories.

Applications and Industries:

VOC sampling and analysis are used in a wide range of applications in the following industries:


Food and Beverage

Forensics and Toxicology



Be sure to visit the application note page to see notes related to the Stratum.  You can sort by filtering by Industry type, product name etc. ​​​​


There are a wide array of methods the Stratum PTC can accommodate, including but not limited to, the following: USEPA 502.1, 502.2, 524.2, 524.3, 524.4, 503.1, 601, 602, 603, 624, 8010, 8015, 8020, 8021, 8030, 8240, 8260, ASTM and Standard Methods, Massachusetts VPH and GRO Methods​