are described along with their application to spectroscopic measurements. Measurement models that are used to assess the error structure are described and compared with process models used to extract physical properties.
Part VI: Overview (Chapter 23), the shortest part, gives a philosophy for EIS that integrates experimental observation, model development, and error analysis. The authors approach differs from the usual sequential approach to developing models for given impedance spectra by emphasizing the advantages of obtaining supporting observations to guide model selection, the use of error analysis to guide regression strategies and experimental design, and the use of models to guide selection of new experiments. They illustrate this approach by citing examples from the scientific literature. This final chapter of the book illustrates that selection of models, even those based on physical principles, requires both error analysis and additional experimental verification.
Part VII: Reference Material includes an appendix on complex integration methods that are required for understanding the derivation of the Kramers-Kronig relationships, as well as lists of tables, examples, and symbols. The 297 references, some as recent as 2007, include books, articles, and dissertations, many by the authors themselves. The index (six double-column pages) provides a userfriendly means of finding specific information. Meticulously numbered mathematical equations, tables, figures, and diagrams appear throughout the text to clarify the material.
The authors present the subject in a manner that facilitates the sequential development of understanding and expertise, either in a formal course or in self-study. Throughout the book, illustrative examples in the form of questions followed by answers demonstrate how the principles that have been described can be applied to problems. In this way the student can try to solve the problems before reading the answers. Also, homework problems, suited for self-study or study under the supervision of an instructor, are given in each chapter. Important equations and relationships are identified and collected in easily accessible tables. An easily recognized icon-an elephant-appears frequently at the bottom of a page where a critical concept is first mentioned, to remind the student that it should be remembered. The elephant also serves to remind the reader of the parable of the blind wise men and the elephant, which is quoted in the introductory section to emphasize the philosophy that impedance spectroscopy cannot be used as a stand-alone technique.