Crimping a Headspace Vial in Gas Chromatography: How not Dec 14, 2009 · To crimp is the physical act of attaching both the septum (the membrane that the needle passes through) and the cap (the metal ring) to the headspace vial as demonstrated below. The devise used to do so is called a crimp (kind of like a walnut cracker). As headspace gas chromatography (as opposed to direct injection) is based upon Henry’s law. Apex Chemicals Headspace Crimp Vials ชนิดก้นแบน : 20ml – 100: VO20R120...

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