the solvent. PTFE/Silicone septa are ideal for use in most HPLC and GC applications where resealability and purity are critical. Pre-slit PTFE/silicone septa Pre-slit septa are offered in many of the same formulations as for non-slit PTFE/silicone septa and shares most of the physical and chemical characteristics. The septum is provided with a
elastomer to the solvent . PTFE/Silicone septa are ideal for use in most HPLC and GC applications where resealability and purity are critical . Pre-slit PTFE/Silicone Septa Pre-slit septa are offered in many of the same formulations as for non-slit PTFE/silicone septa and shares most of the physical and chemical characteristics . The septum is
A specially moulded seal with a PTFE insert. Sealing surface of Butyl and PTFE affects a more positive seal than non-PTFE-faced septa. Ideal choice for temperatures below 125°C. Good sealing characteristics, excellent resistance to most solvents with reduced coring and high puncture tolerance. PTFE provides increased chemical resistance.
Silicone: Alcohol, DMF, DMSO, hydrogen peroxide, sodium hydroxide: ACN, benzene, chloroform, hexane, HCL, MEK, THF, toluene: Silicone / PTFE: PTFE chemical resistance until punctured, then septa or liner will have compatibility of silicone: PTFE does not reseal after being punctured: Viton® Alcohols, benzene, chlorinated solvents, HF, heptane
Septa. Septa are available in a variety of materials and thicknesses. PTFE Natural Rubber are moderately priced seals for GC and HPLC with good chemical properties. They are ideal for multiple injections due to high resealability, but not as easy to penetrate as PTFE/RR. PTFE/High Performance Rubber is a highly pure synthetic red rubber septum
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.
Chemical Natural Rubber SBR, GRS Butyl EPR, EPT, EPDM Buna-N, Nitrile, NBR Hydrin Neoprene Hypalon Urethane, Polyurethane Polysulfide Silicone Fluorosilicone Fluoro Elastomers LEGEND A - RECOMMENDED B - MINOR TO MODERATE EFFECT C - MODERATE TO SEVERE U - UNSATISFACTORY BLANK - INSUFFICIENT DATA AN-VV-O-366b Hdry. Fluid U U U U A B B B A U A A
Made of Polypropylene T504AQX screw cap incorporates a pierceable septum made of chemically resistant PTFE on the outside and silicone on the inside, both components being stable over a broad range of temperatures. The septum also acts as a silicone O-ring for better sample protection. It is. Compare this item.
Suba-Seal ® silicone rubber septa offer improved chemical resistance compared to natural rubber. Suba-Seal ® silicone rubber septa with turnover flange grips outside of the container neck promote a double seal in conjunction with annular serrations on the hollow plug. The annular serrations of the septa depress themselves against the inside
A layer of PTFE on each side of medium hardness silicone. Most resistant to coring with above average resealing characteristics. Recommended for most demanding applications such as trace analysis, longer time between injections, or for internal standards. Use with any autosampler using large diameter, blunt-tip syringe needles.
Nov 5, 2018 · Both PTFE and polyethylene have excellent chemical resistance to THF, but silicone has poor chemical resistance to THF. For an ELSD, RI or MS detector, PTFE or PE septa would be the recommendation.
This disposable septa is made of blue PTFE face and white silicone backing. The blue PTFE liner has excellent chemical resistance and silicon backing has reseal ability. It fits on Q-Tube-12mL, QianCap-15 and 25. Using other septa may cause explosion.
(usually silicone) • Tri-layer (also known as a sandwich septum): Still made from two distinct materials – usually silicone surrounded on both sides by PTFE Table 1. Septa chemical compatibility. PTFE/Silicone/PTFE* PTFE/Red rubber Fluoroelas tomer PTFE/Butyl *PTFE/Silicone/PTFE has the same chemical compatibili ty of PTFE only until punctured.
PTFE-faced silicone rubber septa are autoclavable, resist coring, and are recommended for use in all autosamplers using screw thread vials. Septa and liners can be laminated with PTFE on one or both sides to provide high chemical resistance and a nearly inert barrier between sample and septa material.
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