Overview

Cogent pre‑column filters are designed for chemical inertness, mechanical durability, and broad HPLC system compatibility.

To achieve these performance characteristics, each filter is manufactured using only two high‑purity materials, carefully selected to ensure reliability in demanding analytical environments.

Materials of Construction

The Cogent Column Filters are composed exclusively of:

1. High‑Purity PEEK Housing

• The main body of the filter is manufactured from high‑purity, inert PEEK (polyether ether ketone).
• PEEK is widely used in HPLC instrumentation due to its exceptional chemical resistance, dimensional stability, and compatibility with common organic and aqueous mobile phases.
• Its non‑reactive nature ensures no interference with trace‑level detection or sensitive analytes.

2. Internal Stainless‑Steel Filter Element

• Inside the housing is a precision‑engineered stainless‑steel frit (filter element).
• This component provides robust particulate retention, excellent pressure tolerance, and long‑term structural stability.
• Stainless steel is ideal for use in pre‑column filtration due to its rigidity and resistance to deformation under high‑pressure flow.

These are the only two materials used in the construction of the pre‑column Cogent Column Filters, ensuring predictable, inert performance in a wide range of HPLC applications.