Guard Column cartridge, Diamond Hydride 2.o, replacement, 2.0 mm ID x 10 mm long cartridge packed with 2.2 um, 120 A phase. Cogent TYPE-C Brand. 1 EA.
Additional Info:
Single Diamond Hydride™ 2.o Guard Cartridge for Targeted Column Protection
The 70200‑PG3 Diamond Hydride™ 2.o Guard Column Replacement Cartridge is a single‑unit guard cartridge designed to protect high‑efficiency analytical columns from particulate contamination and strongly retained matrix components. Packed with 2.2 µm Diamond Hydride™ 2.o stationary phase using Cogent TYPE‑C™ silica hydride technology, this cartridge helps preserve peak shape, retention stability, and column efficiency in routine and specialized HILIC workflows.
Single replacement cartridges are ideal for laboratories that prefer phase‑specific flexibility, need intermittent replacements, or wish to evaluate guard protection without purchasing multi‑packs. A compatible guard column holder is required and is sold separately. The cartridge installs directly upstream of the analytical column.
Why Diamond Hydride™ 2.o Guard Cartridges Are Important
When using small‑particle analytical columns, even trace levels of contamination can rapidly degrade performance. A matched guard cartridge:
Captures particulates and irreversibly retained contaminants before they reach the analytical column
Preserves chromatographic efficiency, peak shape, and retention reproducibility
Extends analytical column lifetime and reduces overall replacement costs
Supports consistent results across repeated injections and long sequences
The guard cartridge functions as a sacrificial protection stage, maintaining the integrity of the primary column.
High‑Quality Construction and Handling
The 70200‑PG3 guard cartridge is:
Packed in a durable stainless‑steel tube with stainless‑steel frits
Filled with 2.2 µm, 120 Å Diamond Hydride™ 2.o stationary phase
Individually labeled for traceability and easy identification
Each cartridge is shipped in an individual, closeable black Delrin® storage case to prevent drying, contamination, or handling damage prior to installation.
Diamond Hydride™ 2.o Stationary Phase Consistency
Because the guard cartridge uses the same Diamond Hydride™ 2.o stationary phase as corresponding analytical columns, it ensures:
No change in chromatographic selectivity or elution order
Minimal added dead volume
Seamless integration into existing HILIC methods
Stable retention under high‑organic mobile‑phase conditions
The silica hydride surface supports mixed‑mode interactions, making this guard effective across a wide range of polar analytes.
Compatibility and Use Requirements
The 70200‑PG3 replacement guard cartridge is designed for use with:
2.1 mm ID analytical columns
Diamond Hydride™ 2.o HPLC and LC‑MS methods
A compatible guard column holder is required and is sold separately. The cartridge installs directly upstream of the analytical column.
When to Replace the Guard Cartridge
Replacement is recommended when:
System backpressure increases
Peak shape deteriorates or retention shifts
Sample cleanliness or matrix composition changes
Timely replacement ensures continued protection and consistent analytical performance.