"Probation in Environmental Analysis: A Practical Guide" . 4th Edition . (el.) )" by Y. C. Friend and A. A. Homeland is an indispensable source of knowledge for all who are interested in ecology, analytical chemistry and laboratory research. This publication is a clear and detailed guide to sample preparation, which is an important step in the process of environmental analysis. Unlike many other works, this book focuses on practical aspects, which makes it especially valuable for students, researchers and practitioners. From the first pages, the authors immerse the reader in the world of environmental analysis, emphasizing the importance of sample preparation to obtain reliable results. The book discusses the basic techniques and techniques that are needed to prepare samples, whether it is water, soil or air. The reader will be able to learn about the various methods of extraction, purification and concentration of the analyzed substances, as well as how to avoid common errors in the process of trial preparation. Each section is accompanied by practical examples and recommendations, which makes it easy to apply the knowledge gained in practice. This book will be of interest not only to professional ecologists and chemists, but also to students studying relevant disciplines. It is suitable for those who want to deepen their knowledge in the field of environmental analysis, as well as for those who are just starting their way in this field. Readers interested in the topics of sustainable development, environmental protection and scientific research will find in it a lot of useful information. One of the key topics raised in the book is the importance of data accuracy and reliability in environmental analysis. The authors emphasize that even minor errors during the sample preparation stage can lead to distortion of the results, which in turn can affect decision-making in the field of environmental protection and natural resources management. This makes the book particularly relevant in the face of contemporary environmental challenges, such as climate change and environmental pollution. Style of writing Y. C. Friend and A. A. The homeland is distinguished by clarity and accessibility, which makes it easy to assimilate even the most complex concepts. The authors use many illustrations and tables, which makes the material more clear and understandable. This 4th edition of the book has been updated to reflect the latest advances in sample preparation and environmental analysis, making it relevant and up-to-date. In addition to this book, Y. C. Friends and A. A. Rodin are the authors of other significant works in the field of ecology and analytical chemistry, which confirms their high level of expertise and professionalism. Their research and publications have been recognized both in academia and among practitioners. If you are looking for a quality sample preparation guide in environmental analysis that combines theory and practice, then “Probation in Environmental Analysis: A Practical Guide. 4th Edition . (el.) It will be a great choice. This book will not only expand your knowledge, but also help you become a more confident and competent specialist in the field of ecology. Do not miss the opportunity to get acquainted with this unique publication, which will become your reliable assistant in the world of environmental analysis.