网页2022/12/06 · It is used in sealing the GC injector port and works as an interface for sample injection, but the septum bleed also causes artifacts in GC. The septum bleed can also be observed due to overheating the injector port [11] , so it should have better injection life and stability towards physical and chemical changes [12] , i.e., made of good quality materials.

网页2020/10/27 · To prevent GC septum coring, don’t overtighten the septum nut, be sure to routinely replace your septum, and inspect your syringe (manual or autosampler) for tip damage. Also, consider switching to a softer, more pliable septum. Softer septa are less likely to core than firmer septa. Remember, however, that softer septa usually have a

网页The significant presence of septum-related ghost peaks, causing interference in routine gas chromatography-mass spectrometry analyses at sample injection port temperatures

网页Today, SSP offers these standard and custom products: Autosampler septa. Gas chromatography (GC) septa. Bonded caps. Magnetic caps. EPA/VOA septa. Cap mats. Ultra Low bleed septa for GC-MS and LC-MS. At our manufacturing facility in Ballston Spa, New York (USA), SSP has over 70 employees and a footprint that spans 54,000 sq. ft.

网页Spain: 93 674 88 00 Int. Calls +34 93 669 86 50. AREA/LANGUAGE. Products. Industries. Buy. LOG IN. 0. Home / Products / GC Chromatography / GC Accessories / Septa.

网页Inlet septa are used to maintain a leak-free seal under the septum nut in the GC inlet, even after many repeated injections. The dimple in the middle of the septum guides the

网页Inlet septa. The Inlet septa is an essential part of the sample introduction into a GC system. The purpose of the septa is to create a barrier which is penetrated readily from the nozzle needle and is maintained while the internal pressure is held up without contaminating the analysis. Septa are available in a number of different materials and

网页General Purpose Septa for GC. Aijiren’s general-purpose septa are made from an enhanced injection-molded silicone rubber material. The septa material, dark red or gray in color, is specified to withstand over 200 automatic injections at an injection port temperature of 350 °C. You can have confidence in your chromatographic results knowing

网页2005/03/05 · Posts: 62. Joined: Fri Sep 10, 2004 2:21 pm. Location: St. Louis. by Mark » Wed Mar 02, 2005 5:02 pm. Bluesky, Another possibility might be flashback into the injector pneumatics form an earlier dirty sample, bleeding into the injector over time, would give the same type of indications as septum bleed maybe.

网页2005/09/01 · Figure 2 - Septum degradation (seen as ghost peaks). Following is a simple test that can be performed in the laboratory: Keep the column cold (30 °C) for 15 min,

网页The Advanced Green septum was created to combine significantlylonger injection life, low bleed and low injection port adhesion.The result is a general use green septum you can use for all yourcritical analyses. Advance Green septa are packaged in a plasticdial pack of 10 septa. Related Products: Rubber Septum.

网页Introduction. The septum is used to seal the injection port and it is an interface for injecting the sample. The septa are made of polydimethylsiloxane - a similar polymer is used for stationary phases. When heated, such siloxane polymers will form degradation products that will show up in the GC analysis. Such peaks are called “ghost peaks”.

网页2020/10/28 · In gas chromatography, septum bleed is often attributed to the inlet septum, but the vial cap septum can also be a source. Fortunately, it’s easy to determine which …