Chromatography is a vitally important technique in many industries. HPLC and gas chromatography are both widely used techniques in environmental, food, health, refining and pharmaceutical testing as well as more core chemical analysis. A practical introduction to the more basic aspects of all chromatographic techniques is provided, including these and other methods. All the basic parameters of chromatography are covered from a practice viewpoint - retention, quality of separation, qualitative and quantitative analysis and classical column chromatography.