Specially engineered to fit standard taper joints and tubes. Manufactured under white room conditions for extreme cleanliness. Made of a more dense rubber, low extractables and a better fit (50% to 80% on joints) these septa are much less likely to fail in the presence of solvents. Compare this item.
Used primarily for routine analysis in gas chromatography. Offers moderate ability to reseal and good chemical inertness. Not recommended for multiple injections or holding samples for further analysis. PTFE is protective layer that once broken exposes rubber to chemical attack.
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Selecting the Correct Septa. It's vital to choose the right septa for your application. The wrong septa can compromise the accuracy of your results and reduce the lifespan of your supplies (increasing overall costs). The below chart shows some common septa materials along with their compatibilities, incompatibilities, and resealability.
Headspace vials and caps are used in headspace gas chromatography analysis because of their ability to withstand the pressure from gas. Aijiren headspace vials come in two basic sizes (10 mL headspace vials and 20 mL headspace vials). Both flat bottom and round bottom styles are available for use in a wide variety of headspace instrument platforms.
PTFE/Silicone. Advantages: Re-seals well. Chemical resistance: Not suitable for chlorosilanes. Maximum temperature: 200°C. Suitable for: Multiple injections. Pre-Slit PTFE/Silicone*. Advantages: Less coring; reduced vacuum inside vial. Chemical resistance: Moderate resistance following initial puncture. Maximum temperature: 200°C.
Septa. A wide range of serrated and non-serrated septa, and sleeve stoppers are available for use as temporary closures for glassware joints, tubes, bottles, NMR tubes, ampules, and cannulation techniques in air-sensitive chemistry. To protect your valuable contents in the vessels or containers from the atmosphere, our range of septa provide
Vial septa are available in a variety of materials. Septa, tan PTFE/silicone (diam. x thickness 8 mm x 1.5 mm) are sized to fit screw top vials. They are suitable for use with most organics (until pierced) and are not recommended for use with chlorosilanes. Compare this item.
Mar 31, 2022 · PTFE/rubber septa. PTFE/Red Rubber Septa have: 1. strong solvent resistance, 2. resealing properties, 3. and are coring resistant. When you need a PTFE barrier, they are the most cost-effective option. Until the initial puncture, the PTFE face increases solvent compatibility. Temperature stability chart for PTFE/rubber septa:
Polytetrafluoroethylene ( PTFE) is a synthetic fluoropolymer of tetrafluoroethylene and is a PFAS that has numerous applications. The commonly known brand name of PTFE-based composition is Teflon by Chemours, [3] a spin-off from DuPont, which originally discovered the compound in 1938. [3]
Tuf-bond Septa (9711D10 to D45) Thickness: 100 mils Of silicone rubber with PTFE facing 10 mils thick Septa of butyl rubber, silicone rubber or rubber-laminated PTFE are available on special order. Septum diameter indicated in listings. Related Products: Screw Cap With Septum. Compare this item.
Aijiren 20mm Aluminum Crimp Cap Open Top Headspace Vial PTFE Silicone Septa $7.65 - $13.50
Molded Septa are manufactured from high quality, low bleed material that uses the same exclusive LB-2 rubber formulation chromatographers are accustomed to using. Design. Solid Disc. Type. Septa. For Use With (Equipment) Low Bleed GC-MS Columns. Temperature (Metric) Max. 350°C.
selecting septa. PTFE/red rubber septa are not recommended for multiple injections or for samples that need to be stored for further analysis. When applications require a longer time between injections or any type of standard additions, PTFE/silicone septa are always best. What force is required to penetrate the septum?
PTFE/silicone septa: (T/S) PTFE/Silicone is the most versatile septum material offered in various formulations to address specific applications requirements. Extractables from PTFE/Silicone septa are generally at lower levels compared to other resealable materials. PTFE/Silicone septa are
