Method Development Kit 4254, TYPE-C. Includes 5 Cogent HPLC Columns, 4.6mm x 250mm. Cogent TYPE-C Brand. 1 PK.
Additional Info:
The 40100‑25P Method Development Kit 4254 is a maximum‑resolution analytical method‑development and selectivity‑scouting kit built on Cogent TYPE‑C™ silica hydride technology. This kit provides an economical way to evaluate five complementary stationary phases commonly used in HILIC, reversed‑phase, and mixed‑mode LC methods, using a matched 4.6 mm × 250 mm analytical format.
All columns share identical dimensions, particle size, and pore structure, allowing chromatographers to directly compare stationary‑phase selectivity without confounding effects from column geometry, backpressure, or dwell‑volume differences.
Kit Composition
This method‑development kit includes five analytical HPLC columns, each delivering distinct chromatographic selectivity while maintaining uniform physical specifications:
Shared specifications for all columns:
Internal Diameter: 4.6 mm
Length: 250 mm
Particle Size: 4 µm
Pore Size: 100 Å
Stationary Phase Platform: Cogent TYPE‑C™ silica hydride
This fully matched configuration ensures observed differences during method scouting reflect true stationary‑phase chemistry, not hardware‑related variables.
Application Focus: High‑Resolution Analytical Method Development
Kit 4254 is optimized for final‑stage method development and selectivity refinement where maximum resolving power and peak capacity are required. It is particularly useful when shorter scouting columns do not provide adequate separation confidence.
Column Selectivity Coverage
Diamond Hydride™ – HILIC‑style retention for highly polar analytes
Silica‑C™ – Normal‑phase / HILIC behavior for low‑water and non‑aqueous systems
Bidentate C18™ – Reversed‑phase retention for moderately polar to hydrophobic compounds
Bidentate C8™ – Reduced hydrophobicity for alternative RP selectivity
UDC‑Cholesterol™ – Shape‑selective RP phase for aromatic and sterically distinct analytes
Together, these five phases enable comprehensive selectivity mapping using a consistent TYPE‑C™ surface chemistry.
Why Choose the 4.6 mm × 250 mm Format
The 4.6 mm ID × 250 mm length configuration is selected when resolution and separation confidence are prioritized over run time:
Highest resolving power and peak capacity within the standard analytical ID range
Improved separation of closely eluting compounds
Extended retention for challenging analyte classes
Compatible with UV, ELSD, CAD, and LC‑MS workflows on standard LC platforms
This format is ideal for final method validation, regulatory work, or applications requiring the highest chromatographic confidence.
Key Advantages of Cogent TYPE‑C™ Technology
Across all five columns, the TYPE‑C™ silica hydride platform provides:
Faster equilibration than conventional bonded silica phases
Improved retention stability under both aqueous and high‑organic conditions
Robust column lifetime across HILIC and RP modes
Consistent behavior across different stationary chemistries, simplifying selectivity comparison
These attributes significantly reduce development time while improving reproducibility and robustness.
System Requirements and Flow Rates
Typical flow range (4.6 mm ID): ~1.0–1.5 mL/min
Compatible with standard analytical HPLC and LC systems
No specialized low‑flow or UHPLC‑only hardware required
Operating conditions should be optimized based on mobile‑phase composition, temperature, and system pressure limits.