Metal Ions Analysis with Capillary Zone Electrophoresis

Area of Science:

• Analytical Chemistry
• Separation Science

Background:

• Capillary electrophoresis (CE) is gaining prominence for metal ion analysis.
• Advances in CE are expanding its applications in metal species determination.

Purpose of the Study:

• To review the principles and methods for enhancing metal ion separation using capillary electrophoresis.
• To highlight the role of electrolyte additives and derivatization in CE selectivity for metal species.

Main Methods:

• Discussion of separation principles: complexation, ion pairing, solvation, and micellization.
• Review of pre-electrophoresis derivatization techniques.
• Analysis of factors influencing selectivity for various metal species.

Main Results:

• Electrolyte additives significantly alter separation selectivity.
• Derivatization methods improve the analysis of challenging metal species.
• CE demonstrates versatility for metal cations, complexes, oxoanions, and organometallics.

Conclusions:

• Capillary electrophoresis is a powerful and adaptable technique for comprehensive metal ion analysis.
• Understanding interactions and employing derivatization are key to optimizing CE separations for diverse metal analytes.