Ultra-low bleed silicones for septa promote analytical purity and prevent ghost peaks on chromatographs. To avoid septum bleed, Specialty Silicone [...]
Magnetic Caps
Magnetic caps are designed for autosamplers, such as CTC’s Pal system, that use a magnet to move vials Specialty Silicone Products (SSP) provides open-top caps that are attracted to the strong grip of autosampler magnets for greater processing efficiency and reduced operator handling. The magnetic cap’s center hole supports laboratory testing, but still provides enough surface area for the magnet to securely hold an autosampler vial that’s been filled.
SSP supplies standard magnetic caps with a one-piece, tin alloy construction. These caps are typically gold- or silver-plated and have a 5mm or 8mm center hole for piercing. We also fit our septa into a two-piece aluminum / tin alloy (bi-metallic) crimp cap. This combined the easy of crimping associated with an aluminum cap and the magnetic capability of a steel cap. SSP also supplies 11mm crimp caps that are made of a silver tin alloy. 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. While some of these closures are problematic, the dimensional tolerances are kept tight to ensure a smooth fit on the vial. Our materials and plating technology were carefully chosen to ensure analytical purity is not impacted.
The silicone/PTFE combination that SSP uses with magnetic caps is platinum-cured and can be manufactured for ultra low-bleed properties to enhance analytical purity for Mass-Spec (MS) applications. In other words, the special conditioning process that we use prevents potential contaminants from leaching out of the septa and into your sample. These septa liners are available in a variety of color combinations.
Magnetic caps from SSP are used with autosamplers made by CTC Instruments, Leap Technologies, and many other autosampler manufacturers. Laboratory applications include gas chromatography (GC) and liquid chromatography (LC) with mass spectrometry (MS). To ensure a tight seal, each magnetic cap is designed to support crimping. SSP also offers magnetic screw caps.
See the product tables below for more information about the standard magnetic caps that SSP supplies. All our septa are Made in the USA at our Ballston Spa, New York facility. If you need custom septa and magnetic caps for autosampler vials, click any of the Custom Septa buttons below and then specify your requirements.
Features
- Tin alloy used
- Made to order, custom septa available
- Can be conditioned for ultra-low bleed
- Strong, soft premium silicone
- Born-on date on each package
Benefits
- Strong attachment to autosampler magnets
- Reduced handling, less contamination
- No interfering peaks
- Easy needle penetration, resealable
- Easy to control and identify inventory
18mm Magnetic Screw Cap
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DescriptionProduct ID
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ST2150 .060" Thick, Durometer 55, Blue PTFE/ White Silicone - Ultra Low Bleed Inserted into an 18mm Magnetic Aluminum Screw Cap. Bags of 1000886-1812-C
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ST2150 .060" Thick, Durometer 55, Blue PTFE/ White Silicone - Ultra Low Bleed Inserted into an 18mm Magnetic Aluminum Screw Cap. Bags of 1000886-1812-C
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ST2150 .060" Thick, Durometer 55, Blue PTFE/ White Silicone - Ultra Low Bleed Inserted into an 18mm Magnetic Aluminum Screw Cap. Bags of 1000886-1812-C
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ST2150 .060" Thick, Durometer 55, Blue PTFE/ White Silicone - Ultra Low Bleed Inserted into an 18mm Magnetic Aluminum Screw Cap. Bags of 1000886-1812-C
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ST2150 .060" Thick, Durometer 55, Blue PTFE/ White Silicone - Ultra Low Bleed Inserted into an 18mm Magnetic Aluminum Screw Cap. Bags of 1000886-1812-C
11mm Open Top Magnetic Crimp
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DescriptionProduct ID
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ST1603 .040” Thick, Clear FEP/ Orange Silicone inserted into an 11mm Silver Aluminum Magnetic Crimp Cap. Bags of 1001490-1207-C
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ST1603 .040” Thick, Clear FEP/ Orange Silicone inserted into an 11mm Silver Aluminum Magnetic Crimp Cap. Bags of 10001490-1207-M
20mm Open Top Headspace Magnetic Crimp
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DescriptionProduct ID
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ST157SF .125” Thick, White PTFE/ White Silicone inserted into a Gold 20mm Magnetic Crimp Cap with an 8mm Center Hole. Bags of 1000570-2288-C
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ST157SF .125” Thick, White PTFE/ White Silicone inserted into a Gold 20mm Magnetic Crimp Cap with an 8mm Center Hole. Bags of 10000570-2288-M
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ST157SF ULB .125” Thick, White PTFE/ White Ultra Low Bleed Silicone inserted into a Gold 20mm Magnetic Crimp Cap with a 5mm Center Hole. Bags of 1001420-2258-C
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ST157SF ULB .125” Thick, White PTFE/ White Ultra Low Bleed Silicone inserted into a Gold 20mm Magnetic Crimp Cap with a 8mm Center Hole. Jars of 10001420-2288-M