The butyl septa is tested to 20 ppb of toluene. Test conditions use the PerkinElmer TurboMatrix headspace FID for the analysis, assuring you of the highest quality to attain reproducible results.
Although a wide variety of septa is available, chemical compatibility and temperature are the most critical to the analysis. A needle temperature higher than the vial temperature setting can decompose the septum material. PTFE coated silicone and aluminum-coated silicone offer the highest temperature operating limits.