Amino USP-Equivalent HPLC Columns for Waters Amino (L8)

Maintain Existing USP L8 Methods with Confidence

Cogent® MicroBee™ Amino Columns are USP-Equivalent (Similars™) HPLC columns designed to provide selectivity comparable to the original Waters µBondapak® Amino column commonly specified in USP L8 methods. These columns are ideal for laboratories that need to maintain established compendial, validated, and quality control methods without unnecessary redevelopment or revalidation.

Manufactured using 10µm, 125Å irregular silica and controlled to tight batch-to-batch specifications, MicroBee™ Amino columns deliver reliable performance for routine analytical testing and method continuity.

Common Applications

• Sugar and carbohydrate analysis

• Organic and carboxylic acid separations

• Normal phase chromatography

• HILIC chromatography

• USP L8 replacement methods

• Quality control and compendial testing

Why Choose an Amino USP-Equivalent Column?

Many regulated laboratories use USP L8 methods that were originally developed on amino stationary phases. When replacement columns are needed, maintaining similar selectivity is critical to preserving retention, resolution, and method performance.

MicroBee™ Amino columns are commonly selected when:

• A USP L8 column is specified in a method

• Existing chromatographic conditions must remain unchanged

• Legacy amino columns are difficult to source

• Method transfer requires consistent selectivity

• Routine QC testing demands reproducible performance

Amino Stationary Phase Selectivity

The amino-propyl ligand provides a polar stationary phase that interacts with analytes based on:

• Polarity

• Hydrogen bonding

• Molecular size

• Access to the bonded ligand

These interactions make amino columns particularly useful for compounds that exhibit limited retention on traditional reversed-phase columns.

Compatible Separation Modes

Normal Phase HPLC

Amino columns are most frequently used in normal phase chromatography for separations of:

• Sugars

• Carbohydrates

• Polar compounds

• Organic acids

HILIC Chromatography

MicroBee™ Amino columns can also be used in HILIC mode for enhanced retention of highly polar analytes that are difficult to retain under reversed-phase conditions.

Available Column Configurations

MicroBee™ Amino columns are available in analytical dimensions and additional configurations may be available for:

• Guard columns

• Preparative chromatography

• Process-scale chromatography

For non-standard dimensions or process-scale applications, contact MICROSOLV Customer Service.

Recommended Column Protection

To maximize column lifetime and maintain chromatographic performance, MICROSOLV recommends using a Cogent® HPLC Column Filter whenever possible.