Chemically resistant polyethylene septa are 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. Polypropylene (PP) septa and integral molded closures
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. PTFE/Silicone/PTFE Septa: (T/S/T) A layer of inert PTFE film is laminated to each
Septa Selection Tool | Thermo Fisher Scientific - US
Answer a few simple questions and our SureSTART Selection Guide will recommend the best septa, cap, and vial for your workflow. You can also enter your current septa, cap, and vial part numbers into our equivalence tool to identify equivalent or better-performing Thermo Scientific SureSTART products. SureSTART Selection Guide ›.
Mastering HPLC Analysis: Your Definitive Guide to Selecting HPLC Vials ...
2023年8月22日 · HPLC vials, septa, and caps play indispensable roles in the HPLC process: Preserving Samples: Vials act as guardians for liquid samples, shielding their purity during storage and analysis. Injection Precision: Septa act as sentinels, protecting samples from the HPLC system while preventing evaporation, contamination, and interference.
For HPLC Vial Caps and Septa, you need to know
2022年10月21日 · When selecting vial caps and septa for HPLC applications, several considerations should be taken into account. These factors include material considerations like chemical compatibility, physical characteristics like septa thickness and cap closing mechanisms, accessibility of pre-slit septa for automated systems, compatibility with the HPLC ...
Septa Quality The 1.5 and 4mL vials use a PTFE/silicone septum and its cleanliness is suitable for everyday applications as well as the most discriminating LCMS analyses. The septum is press-fit inside the cap without any bonding agents, which could potentially contaminate samples. It also prevents the needle from pushing the septum into the vial.
How to Choose a Septa Pre-slit or Not? - Hplc Vials
2020年7月31日 · Pre-slit septa is ideal for automatic sampleing because Septa is kept sealed between Vials and Caps, and pre-slit processing makes it easy to puncture the sample feeder's injection into HPLC Vials for sampling. Despite the slit, Septa is also able to maintain the sample seal in HPLC Vial without creating a vacuum in the air pressure inside the ...
Pre-slit vs. non-slit septa caps: Which to choose? - ILT
2018年1月10日 · Non-slit septum caps resealing properties only allow for a limited number of needle punctures. These caps are recommended when the vials are being stored for long periods of time. Non-slit caps also can offer protection …
Guide to Selecting Chromatography Vial Accessories: Septa, Caps, …
2023年11月21日 · Snap Cap: Sealing effectiveness is inferior to screw caps and crimp caps. Press-on snap caps are suitable for storing powdered samples and are not ideal for transporting liquids. Tight-fitting caps may be challenging to place and could potentially break.
For Vial Caps and Septa, What You Need to Know--Aijiren HPLC Vials
2024年3月7日 · Vial caps, when properly sealed with septa, ensure an airtight and secure environment for the sample. This is crucial for preventing contamination and maintaining the stability of the analytes during analysis.
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