Catalog Number - 83000-SP-GH

The 83000‑SP‑GH Cogent™ Semi‑Prep Guard Column Holder is a dedicated hardware assembly designed to protect 10 mm internal‑diameter preparative columns from contamination and particulate damage during semi‑preparative chromatography. This holder is engineered specifically for Cogent RP, Cogent NP, and Cogent IEX semi‑prep guard cartridges, which are sold separately.

Constructed with a stainless steel body and stainless steel frits, the holder provides the mechanical strength and chemical durability required for higher flow rates and larger sample loads typical of semi‑preparative methods. Proper use of a semi‑prep guard holder helps prevent sample contaminants and undissolved particulates from reaching the preparative column bed, preserving column efficiency and extending column lifetime.

Unlike analytical guard holders, semi‑prep systems require larger bore, rigid hardware to maintain alignment and withstand operational stresses. The 83000‑SP‑GH is purpose‑built to meet these requirements.

Why a Semi‑Prep Guard Column Holder Is Essential

Preparative columns represent a significant investment, and their performance is more susceptible to fouling due to higher sample mass. Using a dedicated semi‑prep guard holder:

• Protects expensive prep columns from irreversible contamination

• Reduces downtime caused by column fouling

• Preserves separation efficiency during repeated injections

• Improves overall method robustness

The 83000‑SP‑GH ensures proper seating and flow alignment of guard cartridges, minimizing dead volume and maintaining reproducible separations.

Key Features

Semi‑Preparative Guard Cartridge Compatibility

• Accepts 10 mm ID × 10 mm long Cogent™ prep guard cartridges

• Compatible with multiple stationary phases:

Stainless Steel Construction

• Stainless steel body and frits

• Designed for higher flow rates and prep‑scale operation

• Resistant to mechanical stress and solvent exposure

Column & Instrument Protection

• Traps particulates and strongly retained impurities upstream

• Prevents fouling of preparative column beds

• Helps extend preparative column service life

Dedicated Prep‑Scale Hardware

• Engineered specifically for semi‑prep chromatography

• Not a scaled‑up analytical holder—purpose‑built design

• Ensures correct alignment without adapters

Typical Applications

• Semi‑preparative HPLC

• Purification workflows

• RP, NP, and IEX separations

• Column life‑extension for 10 mm prep columns

• Method development transitioning from analytical to prep scale