Non-seizing tapers for use in purged connections of capillary tubing used in gas chromatography

摘要

A non-seizing taper used for purged capillary tubing connections in gas chromatography that stops capillary tubing at a predictable position within the taper during installation and maintains space for gas to flow past the capillary tubing. The disclosed taper is an improved component of commonly used purged devices such as inlet liners and purged unions. The arresting aspect of the taper simplifies the process of capillary tubing installation while ensuring that the tubing will reproducibly be positioned in the taper. One or more features of the taper prevent tubing from seizing within the taper so that the devices can be reused and ensure that there is open space for a portion of gas to flow around and past the tubing. The angle of the taper, the dimensions of the taper, and the nature of the features within the taper can be adjusted to meet specific performance, usability and/or manufacturability requirements.

主权项

1. A continuously-narrowing taper incorporated into a purged connection for capillary gas chromatography that
a. stops capillary tubing during installation at a predictable position within the taper and b. contains one or more features that prevent capillary tubing of a circular cross section from seizing within the taper and maintains an extra-tubular open space for gas to flow past the end of the capillary tubing.