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major groups: (1) Individual Com- pounds—certain compounds, by virtue of their commercial significance or the complexity of the analytical chemistry...
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city, while in the other arc procedures for the preparation of compounds of specific interest in many fields of organic chemistry. This trend toward an emphasis on the first category reflects the continuing development of new general synthetic methods in the current remarkable upsurge of synthetic organic chemistry. This volume contains

a

subject index.

Quantitative Chemical Analysis, 4th ed. I. M. Kolthoff, E. B. Sandell, E. J. Meehan, and Stanley Bruckenstein. xii + 1199 pages. Macmillan Co., 866 Third Ave., New York, N. Y. 10022. 1969. $14.95

This book is the fourth edition of an internationally renowned text which provides students with both theoretical and practical aspects of analytical chemistry, quantitative analysis, and instrumental analysis. This text is suitable for use in both elementary and advanced courses in analytical chemistry. It provides an excellent supplement for courses in chemical equilibria, optical methods of analysis, and electroanalytical chemistry. Advanced treatments of all types of chemical equilibria, errors, separations, precipitates, and other theoretical topics of analytical imThis

new

UV flow photometer has the

high sensitivity required for chromatographic trace analysis along with the broad range and flow capacity needed for preparative work. Chromatronix Model 200 combines a linear absorbance range from .0001 to 3.0 O.D. with very low noise and drift—less than .0004 O.D. Low drift is insured by a unique multiplexed double-beam system, which uses a single vacuum diode detector to eliminate differential temperature drift. Measurements can be made on any of ten absorbance ranges (from .01 O.D. full scale to 5.12 O.D. full scale) or on a single 0 to 100% transmittance scale. Recorder outputs of 1 mv and 10 mv are supplemented by a 0 to 1 ma output, which will drive low-cost galvanometric recorders. Two interchangeable plugin flow cells are available: an 8-/4 cell for micro-column analyses and a 32-/il cell for monitoring preparative separations, density-gradient centrifugation and electrophoresis. The optical chamber is sealed and can be purged with dry gas to prevent condensation in cold rooms. Chromatronix also offers a new ultrasensitive, wide range conductivity monitor for chromatography. Inquiry will bring you literature on it as well.

CHROMATRONIX Chromatronix,

St. Inc., 2743 Ninth Berkeley, Calif. 94710. Phone (415) 841-7221. Circle No. 179

100 A

·

on Readers’

portance, and chemical methods are included in this text. The aim of this book is to familiarize the student with both classical and physico-chemical analysis, with attention to practice as well as to principles. This text contains a wealth of information not found in any other single book and will serve as a part of the permanent library of the student .

Chemical Encyclopedia of Industrial Analysis, Vol. 8. Foster Dee Snell and Leslie S. Ettre, Editors, xvi + 737 pages. John Wiley & Sons, Inc., 605 Third Ave., New York, N. Y. 10016. 1969. $35.00 subscription, $45.00 single copy This volume of the Encyclopedia is devoted to industrial chemicals. The main entries are divided into four major groups: (1) Individual Compounds—certain compounds, by virtue of their commercial significance or the complexity of the analytical chemistry involved, have been selected as subjects of separate articles; (2) Elements and Their Compounds—these articles compile information related to the element itself, its alloys if any, and those compounds which do not warrant treatment in a separate article; (3) Compounds of Similar Chemical Structure—articles of this nature deal with organic compounds containing the same functional group; (4) Compounds with the Same End Use—articles in this category are intended to aid the analyst who is called

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ANALYTICAL CHEMISTRY, VOL. 42, NO. 4. APRIL 1970

upon to characterize

or evaluate materials which are known to have been manufactured for a particular purpose. In addition to these four types of articles, the main body of the encyclopedia contains a limited number of articles devoted to general methods and techniques. The main subject of the encyclopedia is analytical chemistry. Some chemical technology is included for the purpose of indicating to the analyst, what impurities may be present in commercial grade materials.

Crystal Structures, 2nd ed. Vol. 6, Part 1. Ralph W. G. Wyckoff. viii + 455 pages. John Wiley & Sons, Inc., 605 Third Ave., New York, N. Y. 10016. 1969. $27.50

This sixth volume deals with the structure of benzene derivatives. The single volume that W'as given over to structures containing cyclic organic molecules in the loose-leaf edition of this book has been expanded into three volumes. This, the first of these volumes

which

covers

Part

1

of Chapter

XV, deals with compounds which have

single benzene ring per molecule. Efwere made to arrange these compounds in a way that will associate together those that are chemically related. The classification which wras cho-

a

forts

is based on the number of substitutions in the ring. This method is straightforward except for the chelates, wiiere the molecule can be taken either as the entire complex or as one of the chelated groups. In this volume the second alternative permits grouping together, for instance, all the derivatives of salicylic acid. If this step is borne in mind, it should not be too difficult to locate a compound in the text even without the use of the master table or index. This volume contains both an author index and a subject index. sen

Handbook of Analytical Toxicology. Irving Sunshine, Editor, xiv + 1081 pages. The Chemical Rubber Co., 18901 Cranwood Parkway, Cleveland, Ohio 44128. 1969. $26.00

This handbook collates many data that are essential to scientists concerned with the analysis of drugs, economic poisons, industrial chemicals, and environmental hazards. In addition to collating the physical and chemical properties of drugs and chemical hazards, summaries of published methods for their detection in biological specimens are presented. The reader is given an insight into the analytical approach to the analysis of many compounds and a specific reference wherein the essential details can be found. The result of a quantitative analysis is usually interpreted by comparing it with