Guard Column cartridges, Diamond Hydride, replacement, 2.0 mm ID x 10 mm long cartridges packed with 4 um, 100 A phase. Cogent TYPE-C Brand. 5/PK.
Additional Info:
The 70000‑PG2 Diamond Hydride Guard Column Cartridges are replacement guard cartridges designed to protect analytical HPLC columns from particulate contamination, strongly retained matrix components, and sample‑borne contaminants that can degrade chromatographic performance.
These cartridges are intended for use with a Cogent TYPE‑C™ guard column holder (sold separately) and are specifically matched to Diamond Hydride analytical columns to preserve retention behavior and separation integrity.
Guard Cartridge Use Case: Maintaining Analytical Performance
Guard cartridges function as a sacrificial stationary phase bed, trapping contaminants before they reach the analytical column. To maintain chromatographic fidelity:
The guard cartridge stationary phase must match the analytical column stationary phase.
The Diamond Hydride chemistry used in these cartridges ensures:
No change in retention mechanism
No loss of resolution
No selectivity shifts
No peak distortion or method variation
Using a guard cartridge with a different sorbent chemistry can negatively impact chromatographic performance and compromise analytical results.
Construction & Cartridge Design
Each Diamond Hydride guard cartridge features:
Stainless steel housing for pressure stability and durability
Stainless steel frits for consistent flow distribution
Diamond Hydride stationary phase, 4 µm particle size, 100 Å pore size
Individually labeled cartridges for traceability
Each cartridge is shipped in an individual black, resealable Delrin case to prevent drying and protect against handling damage prior to use.
Analytical Column Compatibility
These guard cartridges are designed for:
2.1 mm ID analytical HPLC columns
Cogent TYPE‑C™ Diamond Hydride analytical columns
HILIC and LC‑MS methods where retention consistency is critical
A compatible Cogent guard column holder is required for installation.
Guard Column Installation Best Practices
To preserve chromatographic efficiency, guard cartridges should be installed as close to the analytical column inlet as physically possible.
Minimizing the distance between the guard holder and analytical column reduces extra‑column (dead) volume, which can otherwise lead to:
Band broadening
Reduced efficiency
Loss of resolution
Peak tailing or distortion
When installed immediately upstream of the analytical column and paired with matching Diamond Hydride chemistry, the guard cartridge protects the analytical column without degrading the separation.
Purpose‑Built for Column Protection & Longevity
The 70000‑PG2 guard cartridges are commonly used in:
Method development laboratories
Routine analytical and QC workflows
LC‑MS and HILIC applications
Regulated environments requiring stable, reproducible performance
Proper use of guard cartridges can significantly extend analytical column lifetime, reduce downtime, and maintain long‑term method consistency.
System Requirements
Requires a Cogent TYPE‑C™ guard column holder (sold separately)
Compatible with standard analytical HPLC systems
No method changes required when stationary phases are properly matched
Protect Your Investment with Our Premium Guard Columns!
Ensure the longevity and performance of your analytical columns with our top-of-the-line Guard Columns. Specifically engineered to shield your columns from particulates and contaminants, these guard columns are a must-have for any lab.
Key Features:
Superior Protection: Prevents adsorption of contaminants, ensuring accurate results.
High-Quality Construction: Packed in durable Stainless Steel tubes with SS Frits for maximum reliability.
Convenient Packaging: Each guard column is labeled and shipped in a sleek, black Delrin case to prevent drying out and damage during transit.
Compatibility:
Designed for use with 2.1 mm ID analytical columns.