Product Category
Silicone septum for lab analysis
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Choosing the correct septum material is vital, as it will interact with the analyte in your sample matrix as well as the sampler needle. Septa can be made from a range of materials including PTFE, silicone, red rubber, luoroelastomers, and butyl to name. few.
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White polypropylene open top cap with bonded PTFE-lined silicone septum. Septum permanently bonded to the cap. Catalog No 297-2414 is an open top cap without septum and can be used with Thermo Scientific loose septa with 24mm diameter. Processed to meet EPA Performance Based Specifications for Volatile Organic Analysis. Includes:
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Jun 9, 2022 · GC inlet septum bleed occurs when volatile degradation products enter the column and is seen as a late eluting series of evenly spaced peaks in a programmed GC analysis. During continuous instrument use, change the septum daily to avoid coring and to stop small pieces of septum from entering into the GC liner (5).
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silicone/ PTFE Thin, fragile needle? Soft and thin septa required e.g. silicone/ PTFE Blunt, thick needle? Slit/pre- cut liner as penetration aid (HPLC) silicone/ PTFE, slit Critical analysis? Very clean liner required
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The PTFE/Silicone septum has proven to be excellent at resealing and is suggested for multiple injections and sample storage. With a recommended operating temperature range of -40°C to 200°C, the PTFE/Silicone septum is chemically resistant until pierced, then achieves the chemical compatibility of the silicone after being punctured, making
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High Temperature GC Septa. High Temperature Septa is made of preconditioned PTFE/silicone rubber and is 3.175 mm (0.125 in) thick. The average life of these septa is up to 100 injections with a 26s gauge needle. The maximum operating temperature is 212° C.
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Waters offers a selection of cap, septum, and assembled cap/septum for various vial sizes. The range of septum material is limited to PTFE, silicone / PTFE, and polyethylene septumless caps. Waters offers scientists and lab managers PTFE/Silicone Septum, WAT022861.
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Oct 21, 2022 · Pre-slit PTFE/silicone. Pre-slit septa feature a slit in the center, allowing easier penetration and sample removal. This type of septum is similar to a silicone septum without a slit because it also has excellent resealing capabilities. One difference is a pre-slit septum is slightly less tolerant of aggressive solvents.
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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.
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That would keep them sterile. organicautomatic. My departmental stores sell 6 mL and 10 mL glass vials with a plastic cap that are outfitted with a PTFE septum, they are guaranteed autoclavable by the company with everything, including the septum, sealed. You can then puncture the septum with a needle in sterile conditions, should be fine.
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When it’s time for sample injection, you can trust the PTFE/Silicone Septum from Waters to help you perform that process successfully. Our septa are held to a high standard of cleanliness and dimensional tolerances, as we believe you should only receive the cleanest products from us right out of the box. Tell your lab manager that you need
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Cole-Parmer ESS GD0707-7000 Sampling Bags With Combination Valve, 1L. Gas sampling bags are constructed of 2-mil thick Tedlar with solid seam to keep gases contained. Unique, polypropylene combination valve features 3/16" OD on/off stem suitable for tubing connections and integral PTFE silicone septum for syringe sampling.
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Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside the neck of the container and preventing material from spilling. Stoppers can be made of glass, cork, rubber, or silicone. They are typically designed with a conical shape, but straight, flanged, and tapered options are
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Our blue 12 x 32 mm Screw Neck Caps and PTFE/Silicone Septum form an excellent seal and mechanically holds the septum in place during piercing. No tools are required for assembly, making it easy to use lab equipment. The cap is manufactured using chemically inert materials to ensure there is no interference with your analytes.
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The septum is provided with a thin 0.005” PTFE layer laminated to highly pure silicone, and slit through the center for easier needle penetration and to release the vacuum that forms when a large volume of sample is withdrawn from a vial.
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