Automation of Microextraction Preconcentration Methods Based on Stepwise Injection Analysis

We present a review of microextraction methods of separation and preconcentration, automated using the principles of equilibrium flow methods of analysis. The concepts and possibilities of automated methods of single-drop microextraction, dispersive microextraction, and homogeneous liquid-liquid extraction are discussed. The analytical potential of these methods is confirmed by some examples of analysis of food products and biological fluids.