Guard Column cartridges, Diamond Hydride 2.o, replacement, 2.0 mm ID x 10 mm long cartridges packed with 2.2 um, 120 A phase. Cogent TYPE-C Brand. 5/PK.
Additional Info:
Diamond Hydride™ 2.o Replacement Guard Cartridges for Analytical Column Protection
The 70200‑PG2 Diamond Hydride™ 2.o Guard Column Replacement Cartridges are designed to protect high‑efficiency analytical columns from particulate contamination and strongly retained sample components. Packed with 2.2 µm Diamond Hydride™ 2.o stationary phase using Cogent TYPE‑C™ silica hydride technology, these guard cartridges help preserve chromatographic performance and extend analytical column lifetime in routine HILIC workflows.
Guard cartridges are an essential component when working with small‑particle analytical columns, where even minor contamination can quickly affect efficiency, peak shape, and retention stability.
Why Diamond Hydride™ 2.o Guard Cartridges Are Recommended
The use of matched replacement guard cartridges provides multiple benefits:
Protects analytical columns from particulates and irreversible fouling
Maintains consistent peak shape and retention behavior
Extends analytical column service life and reduces replacement costs
Supports reproducible performance across extended analytical sequences
These cartridges act as a sacrificial first line of defense, capturing contaminants before they reach the analytical column.
High‑Quality Construction and Handling
Each guard cartridge is:
Packed in durable stainless‑steel tubing with stainless‑steel frits
Filled with 2.2 µm, 120 Å Diamond Hydride™ 2.o stationary phase
Individually labeled for easy identification
To prevent drying, contamination, or handling damage, each cartridge is shipped in an individual, closeable black Delrin® storage case.
Diamond Hydride™ 2.o Stationary Phase Consistency
These guard cartridges are packed with the same Diamond Hydride™ 2.o stationary phase used in corresponding analytical columns, ensuring:
No change in chromatographic selectivity
Minimal additional 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 these guards effective across a broad range of polar analytes.
Compatibility and Use Requirements
The 70200‑PG2 replacement guard cartridges are 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. Cartridges are installed upstream of the analytical column.
Replacement Guidance
Guard cartridges should be replaced when:
Backpressure increases noticeably
Peak shape or retention begins to change
Sample cleanliness or matrix complexity increases
Routine replacement ensures continued protection and consistent analytical performance.