It has the lowest coefficient of expansion (approx. 33 x 10-7˚C) and is composed primarily of silicon and oxygen, with trace amounts of boron and sodium. All KX+ Certified clear glass vials are Type1 33-expansion glass. • Highly resistant to chemical attack. • Total
Both types of products come in bags of 100 or 1000. For applications where crimping is not the preferred option, SSP manufactures and fits septa into an 18mm magnetic screw cap. This plated steel closure can be screwed onto the desired headspace vial eliminating the need for a crimper.
Description. Thermo Scientific™ headspace vials are available in clear or amber glass with a round or flat base, a crimp seal with a beveled or square edge finish, or with a screw-thread finish. Headspace vials, septum, and caps can be purchased in various quantities separately or together as convenience kits to fit your laboratory needs.
• Pre-assembled caps and septa are convenient and minimize contamination from handling • Polypropylene caps are chemically inert and suitable for most chromatography applications • Closures have the profile of a crimp or snap closure for compatibility with
Crimp seals with Viton® septa silver aluminum seal, seal diam. 20 mm, open center, 8 mm center hole, black Viton® septum, thickness 0.76 mm, pkg of × 1000 ea; find Supelco-27246 MSDS, related peer-reviewed papers, technical documents, similar
PTFE/red rubber, diam. × thickness 20 mm × 0.125 in., for use with 20 mm crimp seal, 22 mm screw cap. Pricing. 27101. PTFE/red rubber septum, seal diam. 11 mm, pkg of 100 ea, for use with 2mL-2.5mL standard opening crimp top vials.
All MicroSolv crimp caps are manufactured with high quality pre-inserted septa. We also offer Open Hole caps which require septa to be purchased separately and manually inserted. Soft-Guard™ caps are the most popular brand due to the design of the septa durometer which is easy for needles to pierce causing less stress on the instruments and missed injections.
Crimp seals with PTFE/silicone septa silver aluminum seal, diam. × thickness 11 mm × 1.0 mm, red PTFE/silicone septum, pkg of × 100 ea; find Supelco-27360U MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich
3 A study of the effects of the typical operator response to evaporative sample loss and septum dislodging during the use of 9mm screw thread and 11mm crimp vials and closures was conducted. Sample losses were measured for both overtightened vials and for vials perceived to be optimally tightened and these were compared to losses from new vials
An optimal crimp result is characterized by the following features: The cap surface is flat. The sides of the cap fit tightly around the vial neck and do not show any deformations. The septa is not being sucked into the vial nor does it emerge out of the center hole.
Screw caps and crimp caps with High Performance septa were tested for blank background and solvent compatibility at various pressure and temperature conditions. Stainless steel crimp/screw caps were used to reinforce the seal to the vial and prevent leaks
Our closures with septa are made in a wide variety of sizes and materials ensuring you have the right combination for your sample type and analysis temperature. Each product is manufactured using strict quality control standards resulting in consistent cap dimensions with septa which may be certified for higher purity grades.
Closure type Crimp closure Nominal diameter N 11 Assembling process Assembled Cap material Aluminum Cap color Silver Cap hole Yes Closure magnetic No Septa material Natural rubber/TEF Colors of septa material Red-orange/colorless Septa thickness
The lip of the vial is larger to accommodate thinner septa required in SPME applications. This vial allows you to use 20 mm thin septa (<0.030 in.) and still make a good seal. For our selection of closures, see the SPME vial section: Closures for Thin Seal Crimp Top Vials .
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