Chromatography is a chemical process used to separate mixtures into their constituents. It is used as a technique across a number of industries such as ink factories, milk production, etc. As a method of separating mixtures, it can be performed in a variety of ways with different kinds of apparatus. Some popular techniques of chromatography include gas, column, liquid, ion exchange, thin layer, two-dimensional and reversed-phase chromatography among many others. Some of the topics included in this book elaborate the varied forms of chromatography. This book includes contributions of experts and scientists which will provide innovative insights into this field. The aim of this book is to present researches that have transformed this discipline and aided its advancement. Scientists and students actively engaged in this field will find this book full of crucial and unexplored concepts.