The Tenax® GR is conditioned at 320 °C. PerkinElmer recommends a maximum temperature of 350 °C for this sample tube with a desorption temperature of 300 °C. The tubes approximate analyte volatility range is n-C7 to n-C26 and the typical analytes for the Tenax® GR are Alkyl benzenes, PAH, PCBs, which is the same for Tenax® TA. Compatible for pumped monitoring. Suitable for direct sampling of solids and liquids. PerkinElmer tubes are manufactured to the tightest specifications to ensure trouble free operation and high quality analysis results.