Pharmaceutical Analysis Blog

Capillary Conditioning — The Foundation of Precision in capillary electrophoresis (CE)

In previous issues we saw the importance of a controlled, constant electro-osmotic flow (EOF) for proper precision. In this issue we will therefore look into the different strategies for capillary conditioning, as a good conditioning procedure is...

Principles of HPLC Validation - Training Module 3: Validation and Documentation

A short course in the systematic validation of HPLC methods. We go through the various validation steps in detail. We review the key regulatory requirements from the International Committee on Harmonization (ICH), which also apply to the national...

The Capillary Electrophoresis (CE) Capillary

The small diameter of the capillary in capillary electrophoresis makes for a very good heat dissipation compared with conventional electrophoresis. As a consequence, much higher voltages can be applied before heat dissipation becomes an issue. 

Principles of HPLC Validation - Training Module 2: Method Development and Pre-Validation

A short course in the systematic validation of HPLC methods. The validation process is best started with the first injection during method development. We discuss the importance of having an overall plan for the method development / validation /...

Method Development in Capillary Electrophoresis (CE): Selecting your Background Electrolyte

The selection of the proper background electrolyte (BGE) is key to a successful CE method. We first look into the choices for BGE based on our analyte properties. Capillary electrophoresis (CE) is based on migration of charged components in an...

Principles of HPLC Validation - Training Module 1: Introduction

A short course in the systematic validation of HPLC methods. We start by taking an overview of the validation process and review some of the key references that will be useful in setting up a validation process. We also discuss the terminology...

Reaction Monitoring with UltraPerformance Convergence Chromatography

Once a chemical hit is found through a library screening process and verified, the synthetic route is then optimized. This step involves an iterative process of synthesis and reactivity measurements of the new compound(s) to further develop the...

Why CE (Capillary Electrophoresis)?

The capillary electrophoresis (CE)techniques have been around since the 1980s, and commercial instruments available since the end of that decade. So why would we start on such a topic now? There are several indications for a growing interest in...

Practical Considerations for Achiral Analysis of Pharmaceutical Compounds Using Convergence Chromatography

In convergence chromatography (CC), the modes of interaction between the stationary phase and the solute are numerous, including hydrogen bonding, hydrophobic interactions, dipolar and polarizability interactions and solute partitioning [1]....

The keys to understanding isocratic HPLC

SUCCESSFUL CHROMATOGRAPHY STARTS AT THE BEGINNING

Understanding the basics of any chromatographic technique is the first step towards achieving your analytical goals and allowing correct decision making and effective pharmaceutical method...

    

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