Catalog Number - 40008-PG6

The 40008‑PG6 Cogent Bidentate C8 Guard Column Cartridge is a single replacement cartridge designed to protect standard‑flow analytical HPLC columns from particulates, contaminants, and strongly retained compounds, helping maintain system performance and extend column life.

Each cartridge is:

• 4.0 mm ID × 10 mm length

• Packed with 4 µm, 100 Å TYPE‑C™ silica hydride Bidentate C8 phase

• Constructed in stainless steel housing with SS frits

The cartridge is supplied in an individual protective Delrin™ case, preventing contamination, drying, and damage prior to use.

⚠️ Requires guard column holder (sold separately)

Designed for Standard Analytical Column IDs

This cartridge is optimized for:

• 3.0 mm ID solvent‑saving columns

• 4.0 mm ID analytical columns

• 4.6 mm ID standard HPLC columns

This makes it ideal for traditional HPLC systems where moderate to higher flow rates are used.

Proper guard column integration ensures:

• Minimal peak dispersion

• Maintained chromatographic efficiency

• Consistent method reproducibility

Why Use a Single Guard Cartridge

A single‑cartridge format is ideal when:

• Testing different guard phases across methods

• Using multiple analytical column chemistries

• Replacing cartridges individually as needed

• Avoiding bulk purchase when flexibility is required

This provides method development flexibility while still maintaining column protection.

Why Use Guard Column Protection

Analytical columns are regularly exposed to:

• Particulates and debris

• Strongly retained analytes

• Sample matrix buildup

• Irreversible adsorption

The 40008‑PG6 cartridge acts as a sacrificial protection layer, helping to:

• Extend analytical column lifetime significantly

• Maintain consistent chromatography performance

• Reduce downtime and replacement frequency

• Lower overall cost per analysis

Cartridges can be replaced easily without disturbing the analytical column setup.

Bidentate C8 Guard Phase Advantages

Using the same stationary phase as your analytical column ensures:

• Matched selectivity and retention behavior

• No changes to separation performance

• Seamless analyte transfer

Compared to C18 phases, Bidentate C8:

• Reduces excessive hydrophobic retention

• Improves recovery of amine‑containing compounds

• Provides alternative selectivity for complex samples

• Supports faster equilibration

Cogent TYPE‑C™ Technology Benefits

Silica Hydride Surface

• Reduced silanol activity

• Improved peak shape for basic analytes

• Lower secondary interactions

Faster Equilibration

• Reduced cycle times

• Increased analytical throughput

Durability

• Resistant to hydrolysis

• Long cartridge life

• Stable under routine analytical conditions

Typical Applications

• Standard analytical HPLC workflows

• Pharmaceutical and QC analysis

• Method development and validation

• Complex sample matrices

• Workflows using 3.0–4.6 mm ID columns