manufacturer lots of septa were tested for lot-to-lot consistency. In addition, PTFE/silicone HS septa from 3 vendors were tested for comparison under the same conditions as the High Performance septa. Chemical solvents and reagents All reagents and solvents were HPLC or analytical grade. Milli-Q water was used. Dimethyl sulfoxide,

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.

Septa: PTFE Membrane and Silicone Rubber 0.4 mL Approximately 8 psi (0.6 Bar) 120 ºF (50 ºC) Technical Specifications Choose the Right Mini-UniPrep Filtering Media Sample Type Suitable Mini-UniPrep Media Particulate laden liquids Glass Microfiber (GMF) Aqueous/Organic samples in 3 to 10 pH range Nylon (NYL)

DWK Life Sciences Kimble™ Glass Screw-Thread Sample Vials with PTFE/Silicone Septa and Open-Top Polypropylene Closure Cylindrical shape provides solid balance. Flat bottom facilitates free-standing capability.

The septum is provided with a thin 0.005” PTFE layer laminated to highly pure silicone, and slit through the center for easier needle penetration and to release the vacuum that forms when a large volume of sample is withdrawn from a vial.

Pre-slit PTFE/Silicone Provides adequate venting to prevent vacuum formation in sample vial, delivering excellent sample-draw reproducibility Eliminates coring from bottom draw needles Good resealing capabilities Recommended for multiple injections Working temperature range from -40 ˚C to 200 ˚C PE Septumless Same advantages as PTFE Cap

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

Ideal for use with open-top caps to access container contents with a syringe.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

PTFE/silicone/PTFE – TST1, TST11. A layer of PTFE on each side of medium hardness silicone. Most resistant to coring with above average resealing characteristics. Recommended for most demanding applications such as trace analysis, longer time between injections, or for internal standards.

Chemglass. Replacement septa for use with MW-102 open-top screw caps on Minum-Ware® glassware components. Septa are made of silicone rubber with one side having a RED PTFE face, while the opposite side has an ultrathin covering of polypropylene to prevent needle coring when penetrating septa. Compare this item.

Pre-slit PTFE/Silicone Septa: A PTFE/Silicone septum is provided with a thin 0.005” PTFE layer laminated to our high purity silicone and slit through the center to provide for easier needle penetration as well as to release the vacuum that forms when a large volume of sample is withdrawn from a vial. This septum provides chromatographic

Contents Choosing the right septa When choosing proper septa, there are many factors to consider: type of solvent or sample, slit or non-slit design, and reseal ability. These factors ultimately lead to material makeup of the septa.

EP Scientific Products. Available in clear or amber borosilicate glass Open top vials are assembled with polypropylene caps with 0.060" or 0.125" PTFE/silicone septa Closed top vials are assembled with polypropylene caps with 0.125" PTFE /silicone septa Included polyethylene dust covers protect injection. Compare this item.

Aluminium seal with Medium durometer PTFE/silicone septum.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

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