网页We offer a wide selection of septa including, Sleeve stopper septa, Pigment free septa, Serrated septa, and Precision Seal ® septa caps for suitable applications. Discover our

网页CRS Trajan Scientific Americas Inc + 1.502.491.6300 International 1.800.327.3800 U.S. Only Sales@ChromRes.com

网页A comparative study with commonly employed septa of various types and makes under varying analytic The significant presence of septum-related ghost peaks, causing interference in routine gas chromatography-mass spectrometry analyses at sample injection port temperatures above 100°C, is demonstrated.

网页All septa contain volatile materials (e.g. phthalates) that are released when the septum is heated (septum bleed). Because most GCs are equipped with a septum purge, septum bleed generelly will disappear within 30 minutes after installing a new septum and exposing it to normal injector temperatures. All Restek septa are preconditioned and are

网页2006年4月11日 · Location: Maun Botswana. by Peter Apps » Tue Apr 11, 2006 6:40 am. Hi Zimanli. On the the septum purge flow comes out of a 1/8 inch Swagelok connection at the top, back, left of the instrument. The split outlet is there also so check the labels to make sure you have the right one. This is in the Operator's Manual.

网页A specially moulded seal with a PTFE insert. Sealing surface of Butyl and PTFE affects a more positive seal than non-PTFE-faced septa. Ideal choice for temperatures below

网页プレミアムセプタムは、表面にプラズマ処理を施すことにより注入口へのこびりつきを防ぎ、交換を容易にしたセプタムです。全てのセプタムはコンディショニング済で低ブリードです。プラズマ処理はGC分析に影響を与えません。また、センター

网页All Septa Are Not Created Equal Figure 1. Comparison of Coring, With and Without CenterGuide (30x magnification) High-Temperature Septa Without CenterGuide: Major Coring Before 100 Autoinjections Aijiren BTO Septa With

网页ALL GC Models. 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It is not column bleeding since it shows these peaks for just one special sample. In the attached file, all of the big peaks are detected as hexadecamethyl heptasiloxane! GC.png 16.03 KB Siloxanes

网页2005年9月1日 · 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, perform a blank run (no injection—only a temperature program up to 300 °C), and observe the baseline. After that run, cool the column to 30 °C again, keep it at 30 °C for 60 min

网页Gas Chromatography PRODUCT NOTE Key Features: • Select from a range of GC septa with varying properties limits • Non-stick coating ensures no adhesion of the septa to the GC inlet • Pre-conditioned septa, ready to use

网页Ultra Low Bleed Purple GC Septa with Guide Hole. (4) Lowest bleed performance. Long Life - 450 injections minimum. Maximum temperature up to 325 º C. 50 durometer hardness. Septa comes with Guide Hole.

网页Greyhound Chromatography offers an extensive range of Gas Chromatography GC Septa manufactured from the highest quality materials, in a huge range of sizes to suit all applications. We also supply the Merlin MicroSeal for al

网页Home » News » GC Septa » All Endings Are GC septa Products list 1-4mL Autosampler Vials for HPLC, UPLC, GC 16mm, 25mm Test Tubes for Water Analysis 6-20mL GC