Silicone Septa for Headspace Sampling: Ensuring Reliable and Reproducible Results

Septa. Septa are available in a variety of materials and thicknesses. PTFE Natural 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/RR. PTFE/High Performance Rubber is a highly pure synthetic red rubber septum

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

Each lot of certified kits is tested by HPLC/UV and GC/MS against 15 critical parameters. Certificate of Conformance included in every pack. Kits are delivered shrink-wrapped to ensure product cleanliness. Superior quality 1st hydrolytic class glass (Type 1) in clear and amber. Fixed insert or conical base vials for limited volume sampling.

PTFE/Blue High Purity Silicone Septum(C4020-38A and C4020-42A) Translucent blue silicone is specially formulated and treated to reduce background from extractables or outgassing of volatile contaminants. The silicone elastomer layer is dense but still easily pierced by most headspace sampling needles. Black Rubber Septa: (C4020-40)

Dec 11, 2020 · After 30 min of being sealed and venting for 5 min, a syringe was inserted through the GC septa in the lid and 500 μL headspace loaded (500 μL capacity, Pressure-Lok ®, Vici Precision Sampling, Baton Rouge, LA, USA) The sample was immediately injected into the GC inlet at a rate of ca. 10 μL/sec, maintaining inlet pressure at or below ca

TurboMatrix Headspace and high-sensitivity Headspace Trap samplers provide unparalleled precision and ease of use for numerous GC or GC/MS volatile-analysis applications.

2ml Snap Cap Vials from Aijiren. China clear 2ML 9mm autosampler vials supplier. three types of alum cap with PTFE septa for ND18 headspace vials. China Manufacturer of 11mm Snap Top Caps with Septa. High Quality 4ml 13-425 Screw Thread autosampler Vial Supplier. 2ML 9mm autosampler vials supplier from China.

Jul 11, 2023 · Yes, Pre-slit PTFE/Silicone Septas are commonly used in headspace analysis, which is a technique used for the analysis of volatile compounds in samples. The chemically inert nature of these septa

Aijiren Technologies. Crimp top Use with 20 mm crimp caps Two sizes: 23 x 75 and 23 x 46 mm Round bottom glass headspace vials feature a 20 mm beveled crimp top that creates a much tighter seal than you get with a flat crimp surface. Vials are designed for use with Perkin-Elmer, Tekmar and Varian. . Compare this item.

Chromatography of a perfume sample with headspace sampling. Figure 2. Movement of perfume molecules within a sealed and heated vial. much cleaner, easier and faster. A headspace sampling system automates this process by extracting a small volume of the headspace vapor from the vial and transferring it to the GC column.

High Performance septa are the recommended option for reliable and efficient HS/GC analyses at high temperature. Experimental Screw caps and crimp caps with High Performance septa were tested for blank background and solvent compatibility at various pressure and temperature conditions.

headspace extraction. Immersion sampling sensitivity is improved by filling the sampling vial to a minimum of 80%. The recommended sample volumes are 1 mL to 5 mL and use the same volume for all extractions to achieve reproducible results. Immersion sampling works best for low con-centration water based sample matrices. When using immersion for

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

Advances in glass vial manufacturing now produce the type of threads that are needed to properly seal the vial and cap under pressure, producing a Screw Top Headspace System that works well together. Different cap styles such as magnetic caps, pressure relief caps, and standard crimp caps are available. *We offer almost every type of septa

Mar 30, 2022 · The appearance of the seal after crimping provides good evidence of the amount of compression that has occurred. The sides of a tightly crimped cap should be smooth, with no significant buckling