This document describes the design characteristics of the ferrules used in GC instruments and their contribution to chromatographic signal noise. It also mentions the impact of residue on the background signal during column installation.
The document discusses the critical role of ferrules in creating leak-tight seals for GC columns and detectors. It highlights that trace residues from manufacturing or improper storage can generate significant background noise in chromatographic signals.
Agilent addresses this issue through specific handling, packaging, and preconditioning processes for their Graphite (GRF) and Graphitized/Vespel (GRF/VSP) ferrules. The text includes experimental data comparing Agilent ferrules against competitor products stored in plastic tubes or boxes, demonstrating that Agilent's method significantly reduces outgassed contaminants.
| Material Composition (Short Ferrules) | 85% Vespel, 15% Graphite or 100% Vespel |
|---|---|
| Packaging Unit | 10/pack |
They are packaged in individual compartments within a dial dispenser to prevent contamination from residual manufacturing materials or environmental exposure before use.
Competitor ferrules are often found in plastic tubes or reclosable boxes, which can lead to contamination from semivolatile contaminants picked up on the surface.