Electrochemically modulated liquid chromatographic separation of triazines and the effect of pH on retention
Betsy Jean Yakes1, David W Keller, Marc D Porter
1Department of Chemistry, Ames Laboratory - USDOE, and Institute for Combinatorial Discovery, Iowa State University, Ames, IA 50011, USA. betsy.yakes@fda.hhs.gov
Abstract:
Electrochemically modulated liquid chromatography (EMLC) manipulates analyte retention by changing the potential applied (E(app)) to a conductive stationary phase. This paper applies EMLC to the separation of a set of seven triazines which are commonly used but environmentally hazardous herbicides. Experiments herein examine the influence of E(app) and the pH of the mobile phase on triazine retention. The results are discussed in terms of: (1) retention of triazines of dissimilar acid strengths and by correlations with the pH of the mobile phase; (2) how changes in E(app) and acid-base equilibria modulate elution; (3) qualitative insights into EMLC-based retention; and (4) potential merits of EMLC in realizing the rapid separation of the seven-component triazine mixture.
More Related Videos
08:56Quantitative Analysis of the Cellular Lipidome of Saccharomyces Cerevisiae Using Liquid Chromatography Coupled with Tandem Mass Spectrometry
Published on: March 8, 2020
07:11Automated HPLC Separation Using LC-Mate: An Integrated Repetitive Autosampler and Fraction Collector for Microscale Purification
Published on: February 27, 2026
Related Concept Videos
High-Performance Liquid Chromatography: Introduction
In HPLC, two phases play a critical role in the separation process:
Silica Gel Column Chromatography: Overview
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Ion-Exchange Chromatography
Thin-Layer Chromatography (TLC): Overview
To begin the analysis, a mixture of compounds is spotted on the starting line on the TLC plate using a thin capillary. The bottom of the...
Capillary Electrophoresis: Applications
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Chromatographic Methods: Terminology
