Essential oils and essential oil plants have been used as medicine, aroma chemicals, preservatives, pheromones and attractants, cosmetics, coloring agent, in control of sanitary problems or as indicators of fresh water toxins produced by cyanobacteria etc. Essential oils are the complex mixture of isomers of hydrocarbons, mono- and sesqui-terpenes etc. In the current scenario separation of non- and semi-polar isomers is a big challenge. The work on aromatic plants present in this book was derived through extensive use of selective silver nitrate column chromatography, derivatization, inverted...