PE layer septa 22*1mm

These 40/20/60 mL EPA VOA vials with open-top caps and silicone/PTFE septa are designed for laboratories performing volatile organic compound (VOC) analysis according to EPA Test Methods 5030 and 5035. These methods are widely used to determine the concentration of VOCs in solid and aqueous samples, including compounds such as chlorinated solvents and fuel additives.
For these analytical procedures, samples are typically stored in 40/20/60 mL EPA VOA vials fitted with open-top caps and specialized septa to ensure proper sealing and reliable sample integrity during analysis.
The septa used in these EPA vials are manufactured from a silicone/PTFE construction with a thickness of 0.125 inches. The PTFE layer serves as the primary barrier, minimizing the risk of contamination during sample preparation, storage, and injection.
Because EPA laboratories often measure VOC concentrations at extremely low levels—sometimes below 1 part per billion (ppb)—it is essential that the septa used in VOA vials remain free from background contamination that could interfere with analytical results.
To meet these strict requirements, the septa are produced using high-purity materials and specialized conditioning processes that ensure exceptionally clean performance. Each production batch is tested for compliance with EPA Method 5035, and test reports are available upon request to verify quality and analytical suitability.
These EPA-compliant VOA vial septa provide a reliable solution for laboratories conducting environmental testing, VOC monitoring, and regulatory compliance analysis.