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n-hexane and vial septa – Chromatography Forum Feb 16, 2009 · I learnt from the septa makers that hexane should not be in contact with the septa, but as some of you noted, this is practically impossible if each vial is sampled several times. We have decided to discard septa after a day of work or so, and that seems to do the trick. Also frequent dry runs with the gas mixture help in eliminating phantom peaks. An Aijiren Septum is Not Just a Septum – Aijiren Technologies PTFE/sil...

Tips and Tricks of Injector Maintenance – Aijiren Tips and Tricks of Injector Maintenance – Aijiren Septa selection guide 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. Controlling Contamination in Ult...

An Aijiren Septum is Not Just a Septum – Aijiren Technologies PTFE/silicone septa are always best. What force is required to penetrate the septum? Generally, silicone septa are more easily pierced than red rubber or butyl septa. For thicker, hard-to-pierce septa, a small gauge (23 gauge) needle may be required, or a stronger S-needle can be used. Preslit septa are the best option for Controlling Contamination in LC/MS – Waters Corporation • Self-sealing septa contain silicone tha...

Screw Cap Septum Vials – Thermo Fisher Scientific Screw Cap Septum Vials. For a convenient, versatile, and cost-effective vial and closure system, choose Thermo Scientific™ Screw Cap Septum Vials. Made of autoclavable borosilicate glass and available with a wide assortment of special closures and accessories, these vials are ideal for sample collection and small derivatization reactions for use with automated gas (GC) and liquid chromatography (LC), and for storage of reagents and stand...

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Inlet Septa for Gas Chromatography | Aijiren Inlet Septa for Gas Chromatography. Advanced Green inlet septa eliminate sticking and reduce coring. Bleed temperature optimized (BTO) inlet septa are preconditioned and ready to use with low-bleed, mass spec capillary columns. Our long-life septa are specially formed for extended use, meaning less downtime. Explore Aijiren’s complete portfolio of gas chromatography septa to ensure your GC is operating at peak performance. GC Injection Port ...

Septum N20 But dgr/zt. PTFEgr, 50° 3,0 – analytics-shop.com Replacement septa are not offered for all cap types and sizes, as manual assembly is not recommendable due to contamination risk and possible wrong side orientation. Nevertheless, for the most common sizes and septa materials we offer them along with the 2 mL Screw Top Vials & Screw Caps – Aijiren Technologies The associated 9 mm vial screw cap comes with your choice of septa constructed from either PTFE/silicone, P...

Septa selection guide Polyethylene (PE) septa and integral molded closures 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. Development and validation of a HPLC–MS/MS method for Feb 19, 2023 · After that, the extracts were analyzed using a LC-20A HP...

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