The Role of PTFE and Silicone Septa in Sample Storage and Preservation

I-Chem. Clear borosilicate glass with 0.060 in. Thin Septa 40 mL clear septa vials feature a thin (0.060”) PTFE/silicone septa. The septum is easy to puncture with syringe needles and is ultrasonically bonded to the 24-414 polypropylene closure. No adhesive is used. I-CHEM Certified®.

PTFE/Silicone Septa: (T/S) 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)

Trust our low-level certified vials for Total Organic Carbon testing and sampling. Manufactured, tested and packaged by exacting standards,Thermo Scientific™ TOC Certified Containers are certified to contribute <10ppb or < 20ppb TOC as background. Product Overview. Recommendations. Documents.

Content. Aijiren produces matching Closures for HPLC Vials, especially Septa, which is made of Silicone and PTFE. Septa can ensure that the hplc vials are sealed. At the same time, it must ensure that the automatic injection needle can penetrate into the interior of Vias for sampling, so for Septa There are certain requirements for the thickness.

Storage vial kit, 4 mL, 15 x 45 clear vial, 13-425 closed top, PTFE/silicone septa, 100/pk. Vial size: 15 x 45 mm (13-425 cap)

Septa, tan PTFE/silicone 27177 white tan PTFE/silicone, diam. × total thickness × PTFE thickness 18 mm × 0.060 in. × 5 mil, for use with 22 mL vial, pkg of 100 ea

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

The associated caps are lined with PTFE or PTFE/silicone to restrict impurity contamination. Aijiren storage vial kits offer a high level of chemical resistance. 40 mL vials are popular sample storage vials. 40 mL amber glass vials are most often used in the environmental market segment for onsite sample collection. 4 mL vials are the smallest

Both types of silicone and butyl rubber septa have a PTFE barrier layer which faces the sample, which reduces the contact between the sample and the silicone and butyl rubber. Before the PTFE layer is punctured, the chemical compatibility properties of the PTFE will

Oct 21, 2022 · The septa and vial caps are essential parts of HPLC vials. The vial cap serves as a barrier, keeping outside contaminants out of the vial and preserving the integrity of the sample. The septa, a seal between the injection needle and the vial composed of silicone, PTFE, or rubber, ensure accurate and exact sample injection.

Crimp seals (magnetic) with PTFE/silicone septa, pkg/100 SU860053 gold seal (magnetic, with 8 mm center hole), PTFE/silicone (blue PTFE/white silicone), diam. × thickness 20 mm × 1.5 mm, open center

Dec 11, 2018 · burrs around the caps that might prevent the vial from sealing, and septa should be lined with a polytetrafluoroethylene (PTFE) layer of sufficient thickness to limit diffusion of VOCs out of the vials during storage. PTFE thicknesses of 0.13 to 0.25 mm have been shown to be effective. See reference# 18 in Sec. 4.6 below and Sec.

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

Mar 31, 2022 · PTFE/silicone septa. PTFE/Silicone is an ideal choice for analyzing volatile organic chemicals. These analyses happen at low concentrations or during operation at higher conditioning temperatures. Store PTFE/Silicone septa in a glass Purepak jar to ensure: 1. minimal background, 2. low permeability, 3. and the best performance of any headspace

white PTFE/red Silicone septa, 11mm crimp-top aluminum cap,5.5mm centre hole pre-slit white PTFE/red Silicone septa, 11mm crimp-top aluminum cap,5.5mm centre hole Non-slip Nature PTFE/White Silicone septa,11 mm crimp -top aluminum cap, 5.5 mm centre hole 100pcs/pk 100pcs/pk Model No. Description IPA150 IPB250 IA250 IA250 IPB250 IB300 IB300 V18A