Electrochemical Detectors in HPLC and Ion Chromatography

Area of Science:

• Analytical Chemistry
• Electrochemistry

Background:

• Chromato-polarography was introduced in 1952, enabling polarographic detection for liquid chromatography.
• Development was slow until the 1970s with the advent of modern high-performance liquid chromatography (HPLC).
• Early polarographic detection methods faced challenges in adapting to the low dispersion requirements of HPLC.

Purpose of the Study:

• To explore the development and application of electroanalytical detection methods in liquid chromatography.
• To adapt electrochemical detection techniques for the demands of high-performance liquid chromatography (HPLC).

Main Methods:

• Utilizing solid or quasi-solid (paste) electrodes for detection.
• Developing miniaturized electrochemical cells with low volumes (microliters).
• Employing oxidative amperometric detection principles.

Main Results:

• Solid electrodes facilitated the construction of miniaturized cells suitable for HPLC.
• Oxidative amperometric detection offered a viable alternative for HPLC detection.

Conclusions:

• The evolution of electrochemical detection, particularly using solid electrodes, was crucial for advancing HPLC.
• Miniaturized cells and oxidative amperometric detection enabled more efficient and sensitive analyses in liquid chromatography.