PTFE / Silicone Septa for Sample Screw Caps National Scientific Extremely clean, natural-colored PTFE laminated to clear Silicone. Related Products: Vial Septum

Our closures with septa are made in a wide variety of sizes and materials ensuring you have the right combination for your sample type and analysis temperature. Each product is manufactured using strict quality control standards resulting in consistent cap dimensions with septa which may be certified for higher purity grades.

Short wide-mouth septa jars are suitable for soil sampling. Available in clear or amber Type III glass with open-top polypropylene closures bonded with a 0.045 in. thick PTFE/silicone septa. Now available tare weighted in the 60 mL size. I-CHEM Certified® 200 and 300 series bottles are.

Used primarily for routine analysis in gas chromatography. Offers moderate ability to reseal and good chemical inertness. Not recommended for multiple injections or holding samples for further analysis. PTFE is protective layer that once broken exposes rubber to chemical attack.

Septa Jars I-Chem Short wide-mouth septa jars are suitable for soil sampling. Available in clear or amber Type III glass with open-top polypropylene closures bonded with a 0.045 in. thick PTFE/silicone septa. Now available tare weighted in the 60 mL size. I-CHEM Certified® 200 and 300 series bottles are Related Products: I Chem Jars

QEC's PTFE-lined caps provide the widest range of chemical compatibility with the best temperature tolerance. PTFE liners resist degradation from virtually all chemicals at room temperature, are resilient for a tight seal with low moisture transmission. QEC uses only EPA-compliant 0.015" thick PFTE liners. Level 1 = case quantity package.

The following information guide provides details on a minimal sample weights/ volumes required for particular analyses plus appropriate sample containers, holding times and testing methodology. After sampling, samples should be kept cool and away from direct sunlight using cool boxes provided to minimize degradation and volatilization. Sample

Cross contamination effects from vial septa used in soil and sediment sampling for Volatile Organic containing contaminated soil samples. 3 Results Rubber and PTFE septa were chosen for these ...

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.

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

These septa often emit specific volatile organic compounds (VOCs) confounding the measurement results of breath samples. In the current paper, 14 different brands of magnetic caps with silicone–polytetrafluoroethylene (PTFE), butyl–PTFE, or butyl rubber septa were tested. The total emission of septa over a 4 h period was also evaluated.

Short wide-mouth septa jars are suitable for soil sampling. Available in clear or amber Type III glass with open-top polypropylene closures bonded with a 0.045 in. thick PTFE/silicone septa. Now available tare weighted in the 60 mL size. I-CHEM Certified® 200 and 300 series bottles are.

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

5035 Sample Preservation Kits; Soil Sampling Tools; 5035 Preserved VOA Vials + Air Sampling Bags. Multi-Foil Sample Bags; Tedlar Sample Bags + Caps, Liners & Septa. 24-414 Open Top Caps with Septa; Septa for 24-414 Open Top Caps; 24-414 Open Top Caps, unlined; Black Polypropylene Caps; Bonded-Liner Caps; Phenolic Black Caps; Locking Caps; PTFE

Jan 2, 2006 · Figure 3 - Typical mass chromatogram of volatile residue in hexane caused by PTFE/silicone septa: a) hexane extract of a piece of septum; b) vial septum was punctured once by a syringe to sample 1 μL hexane for GC analysis; c) hexane in the last vial was reanalyzed after 3 days; and d) analyzed immediately after 100 μL hexane was added from one vial to another (the septum was punctured 10