Guard Column Holder, Prep, Cogent RP, NP or IEX Guard. Accepts 10mm x 21.2mm ID Prep Cartridges. Cogent Brand. 1 EA.
Additional Info:
The 83000‑P21‑GH Cogent™ Preparative Guard Column Holder is a heavy‑duty hardware assembly designed to protect 21.2 mm internal‑diameter preparative columns from fouling and particulate contamination during high‑load purification workflows. This holder is engineered specifically for Cogent RP, Cogent NP, and Cogent IEX preparative guard cartridges, which are sold separately.
Constructed with a stainless steel body and stainless steel frits, this guard system provides the mechanical strength and chemical durability required for large‑diameter columns and elevated preparative flow rates. Guard cartridges installed in this holder intercept undissolved particles and strongly retained sample contaminants before they reach the preparative column, helping preserve separation performance and extend column lifetime.
When working at preparative scale, proper guard cartridge housing is critical. The 83000‑P21‑GH ensures correct alignment, secure sealing, and minimal dead volume for 21.2 mm prep columns of all lengths, making it an essential accessory in purification laboratories.
Why a 21.2 mm Prep Guard Holder Is Essential
Preparative columns represent a significant investment and are routinely exposed to high sample mass and particulate loading. Using a guard system designed specifically for large‑ID prep columns:
Protects expensive preparative columns from irreversible fouling
Reduces downtime associated with column cleaning or replacement
Preserves separation efficiency across repeated injections
Improves robustness and reproducibility in purification workflows
The 83000‑P21‑GH is purpose‑built for these demands and should not be substituted with analytical or smaller‑diameter guard holders
Key Features
Preparative Guard Cartridge Compatibility
Accepts 21.2 mm ID × 10 mm long Cogent™ prep guard cartridges
Compatible with multiple stationary phases:
Stainless Steel Construction
Stainless steel body and frits for prep‑scale durability
Withstands higher flow rates and mechanical stress
Excellent solvent and pressure resistance
Column & Instrument Protection
Prevents particulates and strongly adsorbing impurities from reaching the prep column
Helps maintain column efficiency and lifespan
Reduces risk of irreversible column damage
Dedicated Large‑ID Hardware
Designed specifically for 21.2 mm preparative chromatography
Ensures proper cartridge seating and flow alignment
Minimizes dead volume at prep scale
Typical Applications
Preparative HPLC and purification workflows
Large‑scale RP, NP, and IEX chromatography
High‑sample‑load separations
Column life‑extension for 21.2 mm prep columns
Production and development laboratories