The book "Probation in environmental analysis" by the authors of Y. C. Friend and A. A. Homeland is an indispensable work for all who are interested in the issues of ecology, environmental protection and analysis of natural resources. In today's world, where environmental issues are becoming more urgent, this edition offers readers a deep understanding of the importance of sample preparation as a key stage in environmental analysis. The authors, with considerable experience in the field of ecology and analytical chemistry, offer the reader a unique view on the process of preparing samples for subsequent analysis. The book covers a wide range of topics, ranging from the choice of sample preparation methods to the specifics of working with various types of samples - from soil and water to biological objects. This makes the publication relevant for both students and professionals in the field of ecology, chemistry and biology. Trial preparation is not just a technical process, but a whole science that requires knowledge and skills. The authors emphasize that the correct preparation of samples is the key to the reliability and accuracy of the results of the analysis. The book discusses in detail the various methods and technologies used for sample preparation, as well as their impact on the final results. The reader will be able to learn about modern approaches to sample preparation, including innovative technologies that can significantly improve the efficiency of analysis. Who can like this book? It will be of particular interest to students and graduate students studying ecology, chemical technology and related disciplines. Professionals working in laboratories engaged in environmental monitoring or pollution research will also find a lot of useful information in it. In addition, the book will be useful to all who are interested in environmental protection and want to understand more deeply how to properly conduct analyzes to assess the state of ecosystems. The topics raised in the book go beyond a simple description of the methods. The authors discuss the importance of environmental analysis in the context of global environmental challenges such as climate change, water and soil pollution, and biodiversity protection. They emphasize that proper sample preparation not only improves the quality of analysis, but also contributes to a more effective solution of environmental problems. The style of the authors is distinguished by clarity and accessibility, which makes complex scientific concepts understandable to a wide audience. Yu. C. Friends and A. A. Rodin are well-known specialists in their field, and their previous work has also earned recognition. They actively publish scientific articles and participate in international conferences, which confirms their high level of expertise and the relevance of the topics under discussion. The book "Preparation in environmental analysis" will be an important addition to the library of everyone who seeks a deep understanding of environmental processes and methods of their analysis. This is not just a tutorial, but a real find for everyone who wants to contribute to the protection of the environment and the improvement of the quality of life on the planet. If you are looking for information about sample preparation, environmental analysis, as well as modern methods and technologies in this area, this publication will become your reliable satellite in the world of ecology.