These septa provide adequate venting in order to prevent vacuum formation in the sample vial, which allows for superior sample draw reproducibility across vials. Pre-slit PTFE/Silicone septa have a working temperature range from -40 degrees C to 200 degrees C. The chemical compatibility of the septum is that of silicone, but it does not have
Oct 21, 2022 · Oct. 21st, 2022. The septa and vial caps are essential parts of HPLC vials. The vial cap serves as a barrier, keeping outside contaminants out of the vial and preserving the integrity of the sample. The septa, a seal between the injection needle and the vial composed of silicone, PTFE, or rubber, ensure accurate and exact sample injection.
Mar 31, 2022 · PTFE/silicone septa. PTFE/Silicone is an ideal choice for analyzing volatile organic chemicals. These analyses happen at low concentrations or during operation at higher conditioning temperatures. Store PTFE/Silicone septa in a glass Purepak jar to ensure: 1. minimal background, 2. low permeability, 3. and the best performance of any headspace
PTFE/Silicone Septa: (T/S) High quality, pure silicone is laminated to 0.005” thick PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures. PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical.
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.
The septa and vial caps are essential parts of HPLC vials. The vial cap serves as a barrier, keeping outside contaminants out of the vial and preserving the integrity of the sample. The septa, a seal between the injection needle and the vial composed of silicone, PTFE, or rubber, ensure accurate and exact sample injection.
Table 2. Cap and septum chemical compatibility. High performance septa Thin PTFE PTFE/Silicone* PTFE/Silicone/PTFE* PTFE/Red rubber Flouroelastomer Butyl Temperature range 40 °C to 300 °C** Up to 260 °C –40 °C to 200 °C –40 °C to 200 °C –40 °C to 90 °C –40 °C to 260 °C –50 °C to 150 °C Use for multiple injections
GC/MS chromatograms of solvent blank with PTFE/silicone septa and High Performance septa were shown to be equivalent with minimal differences, indicating High Performance septa are compatible with common headspace solvents. 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 0 1e+07 2e+07 3e+07 4e+07. Major septa contamination
Catalog number: C4015-10. Related applications: Chromatography. Technical Support Customer Service. For use with 13-425 threaded caps or 13mm Snap/Crimp Caps, Aijiren Tech™ 13mm Septa are available in PTFE/ Red Rubber, PTFE/Silicone or Red PTFE/White Silicone/Red PTFE to suit a variety of applications. Product Overview.
Each lot of certified kits is tested by HPLC/UV and GC/MS against 15 critical parameters. Certificate of Conformance included in every pack. Kits are delivered shrink-wrapped to ensure product cleanliness. Superior quality 1st hydrolytic class glass (Type 1) in clear and amber. Fixed insert or conical base vials for limited volume sampling.
9 mm Blue Screw Cap PTFE/Silicone Septa 100 N9306202 9 mm Blue Screw Cap Pre-Slit PTFE/Silicone Septa 100 N9306203 2 mL 10 mm Screw Top Clear Vial 100 N9306053 2 mL 10 mm Screw Top Amber Vial 100 N9306057 10 mm Blue Screw Caps Red Rubber Septa 100 N9306200 10 mm Black Screw Caps PTFE/Silicone Septa 100 N9306205 10 mm Black Screw Caps PTFE/Red
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.
Vial crimp seals, BiMetal (magnetic), 20 mm, with PTFE/silicone septa, pkg 100 red seal, PTFE/silicone septa, diam. × thickness 20 mm × 3 mm; find Supelco-29169U MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich
Silicone rubber septa. High quality, silicone rubber laminated to PTFE. Use when excellent resealing qualities are a must. Septum resists coring and is recommended when multiple injections are required. Preferred septa for use in liquid chromatography applications.
Jul 11, 2023 · Yes, Pre-slit PTFE/Silicone Septas are commonly used in headspace analysis, which is a technique used for the analysis of volatile compounds in samples. The chemically inert nature of these septa
