“…Volume 97 of Wilson and Wilson's Comprehensive Analytical Chemistry, "ICP-MS and trace element analysis as tools for better understanding medical conditions", consists of 5 chapters covering sample preparation, new statistical methods with machine learning, homeostasis studies in neurological disorders, single-cell biomedical analysis, and developments in imaging and chemical speciation. 7 The 39 chapters in "X-ray uorescence in biological sciences: principles, instrumentation and applications", are divided into ve sections: (1) a general introduction that includes a comparison with other techniques, as well as the basic principles of the various X-ray techniques and some applications, (2) SR-XRF spectroscopies, (3) TXRF spectroscopy (4) instrumentation, (5) applications to biological samples, (6) special topics and comparison with other methods, a section that includes a chapter devoted to the determination of As. 8 Despite the title of the book, X-ray absorption methods are mentioned.…”