Introduction

One of the most important lines of action in the area of Green Analytical Chemistry has been the development of miniaturised techniques that involves reducing the use of toxic solvents and hazardous substances and decreasing the complexity, cost and time of the procedures. Numerous advances have been reached in this fields and currently, there exists a great number of microextraction techniques thanks, in part, to the development of novel materials, such as nanomaterials and green solvents. In this sense, two big groups of microextraction techniques can be considered: sorbent-based microextractions and solvent-based microextractions. This book pretends to compile, from a general point of view (not focus on just one area of application), the fundamentals, main applications, and novel developments of all these techniques. The main audience will be graduates, postgraduates and researchers. It would be a very interesting option as academic book, especially for those that are working in the development of sustainable extraction techniques.