Ultra Low Bleed Bonded Caps

Ultra-low bleed bonded caps for septa are specialized components designed for use in laboratory applications, particularly in gas chromatography (GC) and other analytical techniques.

They consist of a screw cap with a bonded septum, where the silicone septum securely attached to the cap. These components minimize contamination and improve the reliability of analytical results.

In GC applications, ultra-low bleed bonded caps with septa maintain sample purity and prevent contamination from septa materials during high-temperature analysis.

Features

Ultra-Low Bleed Properties

The term “ultra-low bleed” refers to the reduced release of volatile compounds or other contaminants from the septum during use.

This is critical in applications like GC, where even trace contaminants can interfere with sensitive measurements.

Bonded Design

The septum is permanently bonded to the cap, preventing it from dislodging during repeated punctures by a syringe needle.

This ensures a reliable seal and consistent performance.

Material Composition

The septa are made from high-purity materials such as silicone, PTFE (polytetrafluoroethylene), or a combination of both.

PTFE provides a chemically inert surface, while silicone adds flexibility and resealing properties.

Applications

• Gas Chromatography (GC): Ensures sample integrity by minimizing bleed and contamination.
• Headspace Analysis: Used in headspace vials to prevent sample loss and maintain a reliable seal.
• Other Analytical Techniques: Employed wherever low-bleed septa are essential for accurate results.

Benefits

• Enhanced Analytical Accuracy: Reduces background noise and interference in chromatographic analyses.
• Longevity: Withstands multiple punctures without degrading or leaking.
• Broad Chemical Compatibility: Suitable for use with a wide range of solvents and sample types.