Over the past few years, increasing attention has been paid to the search for bioactive compounds from natural sources. The success of plant-derived products such as paclitaxel (Taxol) in tumor therapy or artemisinin in the treatment of malaria has provided the impetus for the introduction of numerous research programmes, especially in Industry. A great deal of effort is being expended in the generation of novel lead molecules of vegetable, marine and microbial origin by the use of high throughput screening protocols. When interesting hits are found, it is essen tial to have methods available for the rapid isolation of target compounds. For this reason, both industry and academia need efficient preparative chromatographic separation techniques and experience in their application. Purified natural products are required for complete spectro scopic identification and full characterization of new compo unds, for biological testing and for the supply of pharmaceuti cals, standards, and starting materials for synthetic work. Obtaining pure products from an extract can be a very long, te dious and expensive undertaking, involving many steps. Sometimes only minute amounts of the desired compounds are at hand and these entities may be labile. Thus it is an advantage to have access to as many different methods as possible in order to aid the isolation process. Although a certain amount of trial and error may be involved, nowadays there is the possibility of devising suitable rapid separation schemes by a judicious choice of the different techniques available.

Completely revised and substantially extended to reflect the developments in this fast-changing field. It retains the interdisciplinary approach that elegantly combines the chemistry and engineering involved to describe the conception and improvement of chromatographic processes. It also covers recent advances in preparative chromatographic processes for the separation of "smaller" molecules using standard laboratory equipment as well as the detailed conception of industrial chemical plants. The increase in biopharmaceutical substances is reflected by new and revised chapters on different modifications of continuous chromatography as well as ion-exchange chromatography and other separation principles widely used in biochromatography. Following an introductory section on the history of chromatography, the current state of research and the design of chromatographic processes, the book goes on to define the general terminology. There then follow sections on stationary phases, selection of chromatographic systems and process concepts. A completely new chapter deals with engineering and operation of chromatographic equipment. Final chapters on modeling and determination of model parameters as well as model based design, optimization and control of preparative chromatographic processes allow for optimal selection of chromatographic processes. Essential for chemists and chemical engineers in the chemical, pharmaceutical, and food industries.

This book is a distillation of twenty years of practical experience of the high pressure liquid chromatography (HPLC) process. Deliberately steering clear of complex theoretical aspects, this book concentrates on the everyday problems associated with the technique, making it perfect for frequent use in the laboratory and for those in the pharmaceutical, agrochemical and biotechnology industries for the analysis and purification of drugs, small molecules, proteins and DNA.This book...•Provides practical, hands-on advice based on years of experience•Will help ensure optimal design, equipment and separation results for your particular task•Presents system layouts from laboratory to process scale•Will help you to devise or improve record-keeping and documentation systems·Provides practical, hands-on advice based on years of experience·Will help ensure optimal design, equipment and separation results for your particular task·Presents system layouts from laboratory to process scale·Will help you to devise or improve record-keeping and documentation systems

Preparative Chromatography for Separation of Proteins addresses a wide range of modeling, techniques, strategies, and case studies of industrial separation of proteins and peptides. • Covers broad aspects of preparative chromatography with a unique combination of academic and industrial perspectives • Presents Combines modeling with compliantce useing of Quality-by-Design (QbD) approaches including modeling • Features a variety of chromatographic case studies not readily accessible to the general public • Represents an essential reference resource for academic, industrial, and pharmaceutical researchers

Describes the latest developments in the scaling-up and application of chromatographic operations and demonstrates that production-scale chromatography is a powerful and invaluable separation process. The book covers every important process design and reveals actual, immediately applicable techniques and is designed to appeal to design, chemical/biochemical, and research and development engineers, process development managers, bioprocess technologists, analytical and clinical chemists and biochemists, pharmacists, and upper-level undergraduate, graduate, and continuing-education students in these disciplines.

Over the last few years several new instrumental techniques have been introduced for chromatographie separations. In addition, rapid developments in existing methods, such as preparative HPLC, have taken place. Despite these advances, how ever, a handbook covering the various preparative aspects ofthe new separation tech niques does not exist. This book is an attempt to fill the gap and to present a compila tion of modern separation techniques that will be useful for researchers faced with day-to-day preparative problems. Numerous examples of separations have been selected in order to show the possibilities (and also the limits) of each technique treated. These are often either applications from our own laboratory or else they reflect the approach we have been following for the isolation of natural products from plant sourees. Owing to the large number of published papers and the diversity of secondary plant constituents. an exhaustive survey of the literature has not been undertaken. We hope, however, that the examples selected will suggest to the reader which technique(s) and which conditions to choose for a particular isolation problem in the field of natural products. For invaluable help in the preparation of the manuscript for this book, we would like to thank Corinne Appolonia and Christine Marston. Lausanne, November 1985 K. Hostettmann M. Hostettmann A . . Marston Foreword Although not many people realize this, isolation and purification of biologically active materials is becoming increasingly crucial.

This volume provides a straightforward approach to isolation and purification problems with a thorough presentation of preparative LC strategy including the interrelationship between the input and output of the instrumentation, while keeping to an application focus.The book stresses the practical aspects of preparative scale separations from TLC isolations through various laboratory scale column separations to very large scale production. It also gives a thorough description of the performance parameters (e.g. throughput, separation quality, etc.) as a function of operational parameters (e.g. particle size, column size, solvent usage, etc.). Experts in the field have contributed a well balanced presentation of separation development strategies from preparative TLC to commercial preparative process with practical examples in a wide variety of application areas such as drugs, proteins, nucleotides, industrial extracts, organic chemicals, enantiomers, polymers, etc.