"Direct Methods" is a textbook that aims to provide the reader with in-depth knowledge of the principles and methods of direct analysis and measurement in scientific research. The authors, Burtis and Thomson, carefully examine the current approaches and techniques used in laboratory practice, providing the reader with comprehensive information and high-quality advice on how to conduct analyses. This book will become an integral part of many laboratories and a useful source of knowledge for students and scientists interested in direct methods in laboratory practice.