Thermo Scientific Snap Caps
Snap Caps for Autosampler Vials from Thermo Scientific
Snap caps preassembled with septa offer effective evaporation resistance with simple thumb pressure. They are easy to apply and easy to remove and fully compatible with all Snap-It vials.
These chemically inert polyethylene caps are suitable for most chromatography applications and are an economical choice for routine HPLC, GC and IC applications, but with a low sealing property and zero resealing capacity.
Choose from Thermo Scientific National and Thermo Scientific Chromacol brands.
Thermo Scientific snap caps are made from soft polyethylene with double snap functionality that guarantees a tight seal. SureSTART 11 mm snap caps are available in three different performance levels to provide you with the affordability, compatibility, and performance you need.
Performance Level 1 snap caps are cost-efficient and quality tested to deliver the performance, sample security, and reproducibility you need for everyday analyses.
Performance Level 2 snap caps are manufactured and tested to ensure low bleeding, robustness, and reproducibility of results for your routine GC-MS and LC-MS analyses.
Performance Level 3 snap caps provide the ultimate performance and sensitivity from your methods, while maintaining the highest levels of sample security and integrity.
SureSTART 11 mm snap caps are designed to seal Thermo Scientific snap vials easily with simple thumb pressure. Snap caps include silicone/PTFE or rubber/PTFE septa of various hardness values designed to reduce autosampler needle issues.
- Available in three performance levels to suit all applications and budgets
- Fully compatible with all 11 mm Thermo Scientific snap vials
- Snap caps are easy to apply and remove
- Snap caps eliminate the need for crimping or decapping tools
- Pre-assembled caps and septa are convenient and minimize contamination from handling
- Polyethylene caps are chemically inert and suitable for most chromatography applications
- SureSTART snap cap and septa are certified to meet physical parameter specifications
PTFE/Natural Red Rubber
PTFE/Natural Red Rubber are moderately priced seals for GC and HPLC with good chemical properties. They are ideal for multiple injections due to high resealability, but not as easy to penetrate as PTFE/Synthetic Red Rubber.
PTFE/Silicone is the most versatile septum material offered in various formulations to address specific applications requirements. Extractables from PTFE/Silicone septa are generally at lower levels compared to other resealable materials. PTFE/Silicone septa are formulated for different hardness (durometer) meeting requirements of various needle types. Formulations offering highly consistent performance, lowest background/blank value, and good chemical compatibility, effective sealing/resealing and low penetration force make PTFE/Silicone septa suitable for all types of chromatographic applications. A thin film of PTFE is laminated to the side of the septum that faces the sample to limit exposure of the elastomer to 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 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. This septum provides chromatographic characteristics similar to that of a septum without a slit, except that the ability to withstand exposure to aggressive solvents is slightly lessened. Pre-slit septa are highly recommended for Shimadzu, Hitachi, and other autosamplers with thin gauge needles.
Polyethylene Septa and Integral Molded Closures
Chemically resistant polyethylene septa are usually molded into single-piece caps. The surface for needle penetration is 0.01" thick, allowing for use with most HPLC autosamplers. Polyethylene septa are not resealable and are intended for single injection use with aqueous based sample mixtures.