Books ture and perhaps would be more use ful to students. The book is primarily intended for graduate students, particularly those wishing to specialize in electrochemis try. It should be useful also to others working in this field. All proposed experiments are inter esting and, if carefully performed, should give good results in agreement with the literature data. However, these reference data are often not in cluded in the book. The electrochemi cal experiments are preceded by aptly chosen experiments from electronics and some basic information on opera tional amplifiers. The potentiostat is discussed extensively in this part, which is justifiable in view of the role this instrument plays in the study of electrodics. This book should be useful in the study of various electrochemical prob lems. The basic literature of problems discussed and the questions at the end of each section should be helpful. In my opinion, experiments on the double-layer structure would be better carried out with the ac bridge rather than the capacitance meter. This
would be useful for better under standing the nature of electrode reac tions and the equivalent circuits of electrodes. In interfacial tension mea surements I would prefer the use of the Lippmann electrometer rather than the less accurate drop-time mea surements. An explanation of these classical methods of investigation of the double layer would be helpful to students. In the experiments described in 8.1.4 and 8.1.5,1 would advise the use of the HMDE according to Kemula and Kublik. Mercury drops hanging on platinum wire are not advisable be cause zinc forms with platinum in mercury stable intermetallic com pounds. Regretfully, no experiments with the application of thin-layer electro chemistry are mentioned. The authors should have indicated that equations (9.1), (9.2), (9.4), and (9.5) apply quantitatively only to lin ear diffusion conditions. In connection with the curve shown in Figure 10.2, long reduction times may be obtained for mercury-soluble metal only with the mercury pool electrode. With the HMDE the reverse transient would be considerably larger than that given by one third of the electroreduction time. The same limitations regarding dif fusion linearity were not mentioned in
the case of the Sand equation (page 64) and equations (2.91) and (2.92) (page 65). I believe that equation μ = VDT (page 271) was given earlier by Koutecky and Brdicka and in slightly different form by Wiesner. In solving a specific experimental problem, the authors' advice as to the most suitable method from the point of view of reliability of the final result would have been of value. The number of shortcomings, how ever, are not numerous. The text is well written, and the problems are clearly explained. Research students and workers in electrochemistry should find this book useful.
New Books N e w D e v e l o p m e n t s in Separation Methods. Eli G r u s h k a , Ed. viii + 2 4 6 p a g e s . M a r c e l D e k k e r , Inc., 2 7 0 M a d i s o n A v e . , N e w Y o r k , N.Y. 1 0 0 1 6 . 1 9 7 6 . $23.50
Scientists from the different branches of the physical and biological sciences all use separation techniques. However, they are quite apt to over look methods developed by other dis ciplines and to use jargon which tends to hinder cross-communication. A (Continued on page 602 A)
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