1. Green Chemistry and Green Analytical Chemistry 2. Principal Concepts and Guidelines for GAC applied in sample preparation 3. Theoretical approaches in extraction studies 4. Sorbent-based extraction procedures (MSPE, MIP-SPE, SPDE, MEPS, SPME, SBSE, etc.) 5. Membrane-based extraction procedures (FPSE, etc.) 6. Introduction and overview of applications related to green solvents used in sample preparation (DES, NaDES, etc.) 7. Solvent-based extraction procedures (PFE, DSE, MAE, LLE, DLLME, LPME, SFE, etc.) 8. Solvent free extraction procedures (HS-SPME, etc.) 9. How to evaluate the "greenest" of a procedure (GAPI, AgriPREP, etc.) 10. Conclusions and future perspectives