SEPTUM WITH CHAMFER AND LINEAR PRE-PIERCING

摘要

A disc-shaped self-sealing septum (10) for use in the injection port of a gas chromatoraphy system, having a generally conically shaped chamfered indentation (40) extending partially toward the bottom surface (26) of the septum (10) and a linear pre-piercing (50) extending from the bottom end (44) of the chamfered indentation (40) toward the bottom surface (26) of the septum member (10). The linear per-piercing (50) is sized to receive an elongated member for injection of a sample into the system. The beveled sidewalls of the chamfered indentation (40) guide the tip of the elongated member to the linear pre-piercing (50), and the linear pre-piercing (50) allows the elongated member to travel a consistent path during repetitive injections through the septum (10), thereby minimizing damage to the septum (10).