Piotr Szefer – författare

Recent studies have raised concerns about the health effects of dietary exposure to trace elements. An estimated 40 percent of the world's population suffers from developmental and metabolic functional disorders due to trace element deficiencies. Conversely, there is an established link between excess intake of mineral components and diseases of the endocrine, kidney, liver, cardiovascular, and skeletal system. It has become crucial that food chemists understand the origin, function, bioavailability, and interactions of mineral components in food.Mineral Components in Foods presents the state of knowledge on the distribution, speciation, and interaction of mineral components and contaminants inherent in different raw materials and products, as well as acquired during processing, packaging, and handling. With contributions written by some of the foremost food researchers in the world, this book considers the analysis of mineral components in food, the recent advancements in analytical techniques including statistical multivariate approaches to confirm authenticity based on mineral composition, and the quality control practices that ensure consistent and accurate data. The functional role of a number of minerals is addressed along with the effects of their deficiency or excess on the body, their interactions with other minerals, and their changes during storage and processing. Specifically, the authors examine mineral distribution in certain animal and plant products including confections, honey, wine and beer. A considerable portion of the book is devoted to the contamination of foods and food supplements by metals, metalloids and radionuclides, from packaging containers as well as a variety of environmental pathways.With numerous tables and figures clearly expressing a wealth of detailed data, Mineral Components in Foods provides food chemists, quality control professionals, nutritionists, and students in these fields with an invaluable resource to t

Even a cursory perusal of any analytical journal will demonstrate the increasing important of trace and ultra-trace analysis. And as instrumentation continues to develop, the definition of the term "trace element" will undoubtedly continue to change. Covering the composition and underlying properties of freshwater and marine systems, Analytical Measurements in Aquatic Environments provides the basis for understanding both. It discusses all aspects of analytical protocols from the handling of representative samples to the metrological evaluation of specific steps and whole procedures. The book covers:handling of representative samplessample preservation techniquesextraction techniquesspeciation analyticssolvent-free sample preparation for analysisapplication of biotestsbioanalytical methods for monitoring green analytical chemistry-application of the concept of sustainability in analytical laboratoriesapplication of the Life Cycle Assessment approachquality control and quality assurance of analytical resultsenhanced techniques of sample preparationhyphenated analytical techniquesEcotoxicological considerations and the effort to achieve an increasingly accurate description of the state of the environment challenge analytical chemists who need to determine increasingly lower concentrations of various analytes in samples that have complex and even non-homogenous matrices. The newly coined expression "analytics" emphasizes the interdisciplinary nature of available methods for obtaining information about material systems, with many methods that exceed the strict definition of analytical chemistry. Drawing on the disciplines of chemistry, physics, computer science, electronics, material science, and chemometrics, this book provides in depth information on the most important problems in analytics of samples from aquatic ecosystems.

Even a cursory perusal of any analytical journal will demonstrate the increasing important of trace and ultra-trace analysis. And as instrumentation continues to develop, the definition of the term "trace element" will undoubtedly continue to change. Covering the composition and underlying properties of freshwater and marine systems, Analytical Measurements in Aquatic Environments provides the basis for understanding both. It discusses all aspects of analytical protocols from the handling of representative samples to the metrological evaluation of specific steps and whole procedures. The book covers:handling of representative samplessample preservation techniquesextraction techniquesspeciation analyticssolvent-free sample preparation for analysisapplication of biotestsbioanalytical methods for monitoring green analytical chemistry-application of the concept of sustainability in analytical laboratoriesapplication of the Life Cycle Assessment approachquality control and quality assurance of analytical resultsenhanced techniques of sample preparationhyphenated analytical techniquesEcotoxicological considerations and the effort to achieve an increasingly accurate description of the state of the environment challenge analytical chemists who need to determine increasingly lower concentrations of various analytes in samples that have complex and even non-homogenous matrices. The newly coined expression "analytics" emphasizes the interdisciplinary nature of available methods for obtaining information about material systems, with many methods that exceed the strict definition of analytical chemistry. Drawing on the disciplines of chemistry, physics, computer science, electronics, material science, and chemometrics, this book provides in depth information on the most important problems in analytics of samples from aquatic ecosystems.

This book presents an overview of chemometric assessments of analytical dataset in order to determine the authenticity/adulteration of food, animal and plant origin, including meat, fish, seafood, milk and dairy products, honey, cereals and grains, olive oils and oilseeds, vegetables, mushrooms, fruits, tea, coffee, cocoa, sugar, mineral and drinking water, and wines and other alcoholic beverages. The text uses modern analytical methods/techniques coupled with appropriate chemometric tools to demonstrate that chemometrics is a necessary and powerful tool for food analysis and its control. Another main concern is traceability, i.e. the possibility of verifying the geographical, animal/botanical and/or productive origin of a foodstuff; hence the use of chemometric techniques is not only recommended but essential. Since the food is characterized by a complex matrix, the strategy to study its elemental profile should be multivariate. The reported data are extensively tabulated and graphically presented. This book is useful for food chemists, quality control professionals, nutrition and public health educators, analytical chemists, food manufacturers, environmental scientists and students, and practicing professions in food chemistry and food safety.