The purpose of this book is to help chemists, biochemists and other scientists purify the chemical reagents which they use in their work. Although commercially available laboratory chemicals are usually satisfactory as supplied for some purposes in science and technology, for many applications further purification is essential. Therefore the two main chapters of the book describe processes, taken from the literature, for purifying over 5000 organic, inorganic and organometallic commercially available chemicals. Two further chapters describe the methods and techniques currently used for purification in laboratories. In addition, for dealing with substances not separately listed, a chapter is included setting out methods for purifying specific classes of compounds. Finally, there is a new chapter dealing with biological substances which indicates current methods of purification in this area. This expanded and revised third edition includes several hundred individual compounds not previously covered, and more information is given for most entries, including melting and boiling points, molecular weights, refractive indexes, densities and Chemical Abstracts registry numbers, as well as likely contaminants and storage conditions in some cases. In addition, safety information and hazardous substances are indicated as appropriate. Recent developments in techniques of purification have also been added, including new chromatographic methods and materials.

Purification of laboratory chemicals

Science & Math

Perrin, D. D

Chemistry

Pergamon Press

Purification of Laboratory Chemicals, Third Edition

Armarego, W.L.F.

Pergamon

Many chemists and biochemists require to know the ionization constants of organic acids and bases. This is evident from the Science Citation Index which lists The Determination of Ionization Constants by A. Albert and E. P. Serjeant (1971) as one of the most widely quoted books in the chemical literature. Although, ultimately, there is no satisfactory alternative to experimental measurement, it is not always convenient or practicable to make the necessary measure ments and calculations. Moreover, the massive pK. compilations currently available provide values for only a small fraction of known or possible acids or bases. For example, the compilations listed in Section 1. 3 give pK. data for some 6 000--8 000 acids, whereas if the conservative estimate is made that there are one hundred different substituent groups available to substitute in the benzene ring of benzoic acid, approximately five million tri-substituted benzoic acids are theoretically possible. Thus we have long felt that it is useful to consider methods by which a pK. value might be predicted as an interim value to within several tenths of a pH unit using arguments based on linear free energy relationships, by analogy, by extrapolation, by interpolation from existing data, or in some other way. This degree of precision may be adequate for many purposes such as the recording of spectra of pure species (as anion, neutral molecule or cation), for selection of conditions favourable to solvent extraction, and for the interpretation of pH-profiles for organic reactions.

pKa Prediction for Organic Acids and Bases

Springer

This book is intended as a practical manual for chemists, biologists and others whose work requires the use of pH or metal-ion buffers. Much information on buffers is scattered throughout the literature and it has been our endeavour to select data and instructions likely to be helpful in the choice of suitable buffer substances and for the preparation of appropriate solutions. For details of pH measurement and the preparation of standard acid and alkali solutions the reader is referred to a companion volume, A. Albert and E. P. Serjeant's The Determination of Ionization Constants (1971). Although the aims of the book are essentially practical, it also deals in some detail with those theoretical aspects considered most helpful to an understanding of buffer applications. We have cast our net widely to include pH buffers for particular purposes and for measurements in non-aqueous and mixed solvent systems. In recent years there has been a significant expansion in the range of available buffers, particularly for biological studies, largely in conse quence of the development of many zwiUerionic buffers by Good et al. (1966). These are described in Chapter 3.

Buffers for Ph and Metal Ion Control (Outline Studies in Biology)

Chapman & Hall

The purpose of this book is to help chemists, biochemists and other scientists purify the chemical reagents which they use in their work. Despite the fact that commercially available chemicals are often of a very high quality, and quite satisfactory for some applications within science and technology, it is becoming almost as important to know what impurities are present and make allowance for them as to remove them completely. This book will show you how. The main chapters describe processes, taken from the literature, for purifying over 4000 organic and 750 inorganic and organometallic commercially available chemicals. Further chapters describe the methods and techniques currently used for purification in laboratories and prescribed in the text. Methods for purifying classes of chemicals where specific compounds are not treated individually in the text are dealt with in a separate chapter. This considerably expanded and revised fourth edition includes much new material dealing with modern reagents for natural products chemistry, protein biochemistry and molecular biology. It also includes many individual compounds not previously covered, and more information is given for most entries, including melting and boiling points, molecular weights, refractive indexes, densities and CAS registry numbers, as well as likely contaminants and storage conditions in appropriate cases.

Purification of Laboratory Chemicals, Fourth Edition

Butterworth-Heinemann

The purpose of this book is to help chemists, biochemists and other scientists purify the chemical reagents which they use in their work. Despite the fact that commercially available chemicals are often of a very high quality, and quite satisfactory for some applications within science and technology, it is becoming almost as important to know what impurities are present and make allowance for them as to remove them completely. This book will show you how. Chapter 1 has been reorganised and updated, and most of it is in smaller print in order not to increase the size of the book. Chapters 2 and 5 have been similarly altered and combined into one chapter, Chapter 2, again in order to save pages. 800 and 350 entries have been added to Chapter 3 (25% increase) and Chapter 4 (44% increase) respectively, and 400 entries (310% increase) were added to Chapter 5 (Chapter 6 in the third edition) making a total of 5700 entries, all resulting in an increase from 319 to 529 pages, i.e. ca 35%. This considerably expanded and revised fourth edition includes much new material dealing with modern reagents for natural products chemistry, protein biochemistry and molecular biology. It also includes many individual compounds not previously covered, and more information is given for most entries, including melting and boiling points, molecular weights, refractive indexes, densities and CAS registry numbers, as well as likely contaminants and storage conditions in appropriate cases.

Purification of Laboratory Chemicals

Organic complexing reagents: Structure, behavior, and application to inorganic analysis

R.E. Krieger Pub. Co.

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