septa from several competitors with High Performance septa. As shown in the figure, the High Performance septa provided low HS chromatographic background at 300 °C. 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 Supplier 3 Thermaseal HS septa Claimed can be used up to 300 °C Supplier 2 PTFE/silicone HS septa Claimed can be used up to

1 Septa Selection Guide PTFE Recommended for single injection applications Excellent solvent resistance and chemical compatibility Does not reseal upon puncturing Not recommended for long-term sample storage PTFE/Silicone Recommended for multiple injections and sample storage Demonstrates excellent resealing 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

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

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.

Silicone Fluorosilicone Fluoro Elastomers LEGEND A - RECOMMENDED B - MINOR TO MODERATE EFFECT C - MODERATE TO SEVERE U - UNSATISFACTORY BLANK - INSUFFICIENT DATA Ammonia Gas,Cold A A A A A A A A A A U Ammonia Gas,Hot U U B B U B B U A U U Ammonia and Lithium Metalin Solution U U B B B U U U U U U Ammonium Carbonate A A A A U B A

Nov 5, 2018 · Also take note of the needle wash solvent composition and ensure compatibility of the solvent with the septa if repeat injections are to be made. Dissolved silicone will be transferred to the

Chemical Compatibility Guide Container Materials Closure Liner Materials Closure Materials Septa, Stopper & Tubing Materials Poly- Butyl Natural Chemical Glass HDPE LDPE PC PET PETG PP Al Foil LDPE Vinyl PTFE SBR Silicone PBT Phenolic PP Urea Rubber FKM Rubber PTFE Silicone TPE

Septa, PTFE/Silicone; Septa may be used in headspace solid-phase microextraction (SPME) (lyophilized aqueous extract). compatibility. for use with 20 mm crimp ...

(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.

Septa, Blue PTFE/white silicone, pkg/100 blue PTFE/white silicone, diam. × thickness 11 mm × 0.060 in., for use with 4 mL vial; find Supelco-27511 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich

Blue Screw Caps, PTFE/silicone/PTFE septa : 100/pk : 5182-0724: Green Screw Caps, PTFE/silicone/PTFE septa : 100/pk : 5182-0725: Red Screw Caps, PTFE/silicone/PTFE septa : 100/pk : : Blue Screw Caps, pre-slit PTFE/silicone septa : 100/pk : 5183-2077: Green Screw Caps, pre-slit PTFE/silicone septa : 100/pk : 5183-2078

Jul 11, 2023 · To install a Pre-slit PTFE/Silicone Septa on a vial, place the septa on the open end of the vial and secure it with a compatible cap, such as a crimp cap or screw cap.

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

Product No. Description. Pricing. 29655-U. volume 1.5 mL, CD (Center Draining) Vial, clear glass vial, natural PTFE/silicone septa, thread for 9 mm, pkg of 100 ea. Expand. Hide. 29656-U. volume 1.5 mL, CD (Center Draining) Vial, clear glass vial, natural PTFE/silicone septa (with slit), thread for 9 mm, pkg of 100 ea.