Gas Chromatography: History, Methods and Applications focuses on the main applications of gas chromatography in clinical and forensic toxicology, mainly in the determination of drugs of abuse including the new psychoactive substances in several types of biological matrices. The authors go on to investigated the analysis of gaseous or volatile substances using sensor gas chromatography equipped with a semiconductor gas sensor detector. The simplicity, ease of handling, and high sensitivity of this method allow results to be obtained rapidly, which may provide valuable information for forensic diagnosis. This compilation addresses the way in which food adulteration practices are potentially harmful to human health and so food safety and authenticity constitute an important issue in food chemistry. The chemical composition of foodstuffs is an excellent indicator of quality, origin, authenticity and/or adulteration. The concluding study aims to determine the organic compounds of vinasse through gas chromatography-mass spectrometry GC-MS. Vinasse is a byproduct of ethanol and poses long-term risk to public health because of its persistent and toxic nature.

The book highlights the current practices and future trends in structural characterization of impurities and degradants. It begins with an overview of mass spectrometry techniques as related to the analysis of impurities and degradants, followed by studies involving characterization of process related impurities (including potential genotoxic impurities), and excipient related impurities in formulated products. Both general practitioners in pharmaceutical research and specialists in analytical chemistry field will benefit from this book that will detail step-by-step approaches and new strategies to solve challenging problems related to pharmaceutical research.

This book presents the latest advances in the characterization of fatty acids by the various chromatographic methods available, with emphasis on the separation of positional isomers. It focuses on the characterization of positional isomers of substituted, unsaturated, and cyclic fatty acids.

This book covers a range of topics of interest to those involved in the fractionation and characterization of polymeric substances. It deals with problems that are encountered in modern gel permeation chromatography with dual detection when calculating average molecular weights.

This book is loosely based on a Multidisciplinary University Research Initiative (MURI) project and a few supplemental projects sponsored by the Of?ce of Naval Research (ONR) during the time frame of 2004-2009. The initial technical scope and vision of the MURI project was formulated by Drs. Larry Cooper and Joel Davis, both program of?cers at ONR at the time. The unifying theme of this MURI project and its companionefforts is the concept of cellular nonlinear/neuralnetwork (CNN) technology and its various extensions and chip implementations, including nanoscale sensors and the broadening ?eld of cellular wave computing. In recent years, CNN-based vision system drew much attention from vision scientists to device technologists and computer architects. Due to its early - plementation in a two-dimensional (2D) topography, it found success in early vision technologyapplications, such as focal-plane arrays, locally adaptable sensor/ processor integration, resulting in extremely high frame rates of 10,000 frames per second. More recently it drew increasing attention from computer architects, due to its intrinsic local interconnect architecture and parallel processing paradigm. As a result, a few spin-off companies have already been successful in bringing cel- lar wave computing and CNN technology to the market. This book aims to capture some of the recent advances in the ?eld of CNN research and a few select areas of applications.

Mass Spectrometry-Based Metabolomics: A Practical Guide is a simple, step-by-step reference for profiling metabolites in a target organism. It discusses optimization of sample preparation for urine, serum, blood, tissue, food, and plant and animal cell samples. Encompassing three different technical fields-biology, analytical chemistry, and informatics- mass spectrometry-based metabolomics can be challenging for biologists without special training in quantitative mass spectrometry. This book is designed to overcome this limitation by providing researchers with the knowledge they need to use metabolomics technology in their respective disciplines. The book summarizes all steps in metabolomics research, from experimental design to sample preparation, analytical procedures, and data analysis. Case studies are presented for easy understanding of the metabolomics workflow and its practical applications in different research fields. The book includes an in-house library and built-in software so that those new to the field can begin to analyze real data samples. In addition to being an excellent introductory text, the book also contains the latest advancements in this emerging field and can thus be a useful reference for metabolomics specialists.

Despite more than one century of observational stellar spectroscopy, the resulting data are not available in an easily accessible format. The necessity of such basic information is greater than ever, because new wavelength regions (ultraviolet, infrared) are now accessible and because modern receivers can only analyze short stretches of spectra, so that a careful pre-selection of strategic elements is mandatory. This book presents a summary of our knowledge of the behavior of all chemical elements identified in stars, based on observations rather than on their interpretations. Whenever possible the behavior is described quantitatively, with the help of equivalent widths in different types of stars, or different ionization stages, for both absorption and emission features. It will be essential to the spectroscopist when confronted with questions like the following: . What is the behavior of europium in metallic line stars or in S-type stars? Are the neutral lines of this element visible, are they strengthened or weakened with regard to normal dwarfs? A huge amount of data has been gathered by experts in the field and presented in a way that will be invaluable to professional astrophysicists, cosmochemists and their students.

This study investigates the role of coagulation in enhancing hydraulic performance and permeate quality of UF membranes and provides insight into options for minimizing or ideally eliminating coagulation from UF pre-treatment to SWRO. Results show that coagulation improves UF hydraulic performance mainly by reducing non-backwashable fouling of the membranes. This can be achieved at very low coagulant dose ( 0.5 mg Fe/L) by coating the membranes with sub-micron particles.
Additionally, the work highlights the applicability of UF membranes with low molecular weight cut-off as the coagulant free future of SWRO pre-treatment. Major benefits in terms of reduced environmental impact is expected when applying membranes with low molecular weight cut-off, as the need for coagulation is eliminated while ensuring longevity of downstream SWRO membranes. In general terms, the research indicates that coagulant consumption can be significantly reduced in UF pre-treatment of SWRO by optimizing operational parameters and applying alternative solutions.

This book provides information on the determination of anticonvulsants using high-pressure liquid chromatography, microparticulate reversed-phase packing in high-pressure liquid chromatography, gas-chromatographic analysis of the soil atmosphere, and kinematics of gel permeation chromatography.

This book will fulfill the needs of time-domain spectroscopists who wish to deepen their understanding of both the theoretical and experimental features of this cutting-edge spectroscopy technique. Coherent Multidimensional Spectroscopy (CMDS) is a state-of-the-art technique with applications in a variety of subjects like chemistry, molecular physics, biochemistry, biophysics, and material science. Due to dramatic advancements of ultrafast laser technologies, diverse multidimensional spectroscopic methods utilizing combinations of THz, IR, visible, UV, and X-ray radiation sources have been developed and used to study real time dynamics of small molecules in solutions, proteins and nucleic acids in condensed phases and membranes, single and multiple excitons in functional materials like semiconductors, quantum dots, and solar cells, photo-excited states in light-harvesting complexes, ions in battery electrolytes, electronic and conformational changes in charge or proton transfer systems, and excess electrons and protons in water and biological systems.

An all-inclusive guide on the analytical methods of Raman, infrared, and near-infrared chemical imaging

An underutilized technology, chemical imaging through Raman, infrared (IR), and near-infrared (NIR) is beginning to gain recognition for its non-destructive method of permitting visualization of spatially resolved chemical information. This type of analysis is triggering a groundswell of demand as manufactured materials become more complex and the need for greater scrutiny and less damaging research practices is at a premium. Concentrating on the applications of chemical imaging, this book presents a thorough background on the theory, software, and hardware employed in this analytical technique. With full examination of this rapidly growing field, this book:

Combines many different aspects and applications into one comprehensive volume

Discusses how chemical imaging techniques have expanded greatly in terms of instruments and applications, but have lagged in general awareness among scientists and industries that would benefit the most from them

Describes chemical imaging uses in key areas--biomedical, pharmaceutical, food, and polymer research

Has chapters that outline hardware and instrumentation for the different methods of chemical imaging

Encapsulating analytic methods without complicating the subject matter, this book shows where chemical imaging has been successfully applied, inspiring researchers to cultivate the exciting capabilities rooted within this powerful and multifaceted technology.

Due to its high sensitivity and selectivity, liquid chromatography-mass spectrometry (LC-MS) is a powerful technique. It is used for various applications, often involving the detection and identification of chemicals in a complex mixture. Ultra Performance Liquid Chromatography Mass Spectrometry: Evaluation and Applications in Food Analysis presents a unique collection of up-to-date UPLC-MS/MS methods for the separation and quantitative determination of components, contaminants, vitamins, and aroma and flavor compounds in a wide variety of foods and food products. The book begins with an overview of the history, principles, and advancement of chromatography. It discusses the use of UHPLC techniques in food metablomics, approaches for analysis of foodborne carcinogens, and details of UPLC-MS techniques used for the separation and determination of capsaicinoids. Chapters describe the analysis of contaminants in food, including pesticides, aflatoxin, perfluorochemicals, and acrylamide, as well as potentially carcinogenic heterocyclic amines in cooked foods. The book covers food analysis for beneficial compounds, such as the determination of folate, vitamin content analysis, applications for avocado metabolite studies, virgin olive oil component analysis, lactose determination in milk, and analysis of minor components of cocoa and phenolic compounds in fruits and vegetables. With contributions by experts in interdisciplinary fields, this reference offers practical information for readers in research and development, production, and routing analysis of foods and food products.

This volume provides up-to-date information on the developments in chromatographic methods and applications to provide readers with stimulating, critical, readable, and relevant reviews of this subject. It includes information on high-pressure liquid chromatography in pharmacology and toxicology.

Capillary electrochromatography (CEC) is a new and exciting hybrid separation technique that seeks to exploit the combined advantages of both capillary electrophoresis (high efficiencies) and HPLC (mobile and stationary phase selectivity). It is a technique with tremendous potential, especially in the pharmaceutical and biomedical fields. This is the first book to be devoted to the topic and presents reviews by the world leaders in the field on the theory and development of the technique and current and potential future applications. Capillary Electrochromatography provides an excellent introduction to the field for graduates and professionals in industry and academia with an interest in separation science.

This volume provides up-to-date information on a wide range of developments in chromatographic methods and applications. It includes information on detection, relations between peak area and the component in the chromatographic band, prediction of the relative molar response and working techniques.

Impedance Spectroscopy is a powerful measurement method used in many application fields such as electrochemistry, material science, biology and medicine, semiconductor industry and sensors. Using the complex impedance at various frequencies increases the informational basis that can be gained during a measurement. It helps to separate different effects that contribute to a measurement and, together with advanced mathematical methods, non-accessible quantities can be calculated. This book is the fourth in the series Lecture Notes on Impedance Spectroscopy (LNIS). The series covers new advances in the field of impedance spectroscopy including fundamentals, methods and applications. It releases scientific contributions from the International Workshop on Impedance Spectroscopy (IWIS) as extended chapters including detailed information about recent scientific research results. This book is of interest to graduated students, engineers, researchers and specialists dealing with impedance spectroscopy. It includes fundamentals of impedance spectroscopy as well as specific theoretical and practical aspects from many applications in various fields.

The latest edition of this highly acclaimed title introduces the reader to a wide range of spectroscopies, and includes both the background theory and applications to structure determination and chemical analysis. It covers rotational, vibrational, electronic, photoelectron and Auger spectroscopy, as well as EXAFs and the theory of lasers and laser spectroscopy. * A revised and updated edition of a successful, clearly written book* Includes the latest developments in modern laser techniques, such as cavity ring--down spectroscopy and femtosecond lasers* Provides numerous worked examples, calculations and questions at the end of chapters

Flame Spectrometry in Environmental Chemical Analysis is a simple, user-friendly guide to safe flame spectrometric methods for environmental samples. It explains key processes involved in achieving accurate and reliable results in atomic absorption spectrometry, atomic fluorescence spectrometry and flame emission spectrometry, showing the inter-relationship of the three techniques, and their relative importance. Flame Spectrometry in Environmental Chemical Analysis presents the important information with thoroughness and clarity, and in a style that makes it valuable to students and researchers using these techniques. It also offers straightforward reading for environmentalists with interests in such areas as pollution research, agriculture, ecology, soil science, geology and forestry; informing researchers of exactly what they can expect to be able to determine by flame spectrometric methods. Newcomers to flame spectrometry will gain increased confidence, job skills and many handy tips and ideas from this book. It will impart a strong working knowledge that can be translated into sound data in the laboratory.

This book comprises seventeen independent essays on little remembered chemists whose contributions have had significant impact on chemistry and society. Among these chemists, readers will find names such as Alexander Borodin and Sir William Crookes, whose fame is known but not their chemistry. In the remaining fifteen essays readers will discover about less well-known chemists such as Frederick Accum, John Mercer and Ellen Swallow Richards. Each essay is complete in itself with selection made without regard to the area of chemistry involved, and they appear alphabetically by the family name of individual. This collection of essays consists of selections from the series originally published quarterly as Some Unremembered Chemists in the New Zealand Institute of Chemistry in-house journal, Chemistry in New Zealand (2013-2018). They are abstracted, edited and abbreviated slightly, and appear with the permission of the copyright holder.

Properties and applications of high surface area materials depend on interfacial phenomena, including diffusion, sorption, dissolution, solvation, surface reactions, catalysis, and phase transitions. Among the physicochemical methods that give useful information regarding these complex phenomena, nuclear magnetic resonance (NMR) spectroscopy is the most universal, yielding detailed structural data regarding molecules, solids, and interfaces. Nuclear Magnetic Resonance Studies of Interfacial Phenomena summarizes NMR research results collected over the past three decades for a wide range of materials-from nanomaterials and nanocomposites to biomaterials, cells, tissues, and seeds. This book describes the applications of important new NMR spectroscopic methods to a variety of useful materials and compares them with results from other techniques such as adsorption, differential scanning calorimetry, thermally stimulated depolarization current, dielectric relaxation spectroscopy, infrared spectroscopy, optical microscopy, and small-angle and wide-angle x-ray scattering. The text explores the application of NMR spectroscopy to examine interfacial phenomena in objects of increasing complexity, beginning with unmodified and modified silica materials. It then describes properties of various mixed oxides with comparisons to individual oxides and also describes carbon materials such as graphite and carbon nanotubes. Chapters deal with carbon-mineral hybrids and their mosaic surface structures, and interfacial phenomena at the surface of natural and synthetics polymers. They also explore a variety of biosystems, which are much more complex, including biomacromolecules (proteins, DNA, and lipids), cells and tissues, and seeds and herbs. The authors cover trends in interfacial phenomena investigations, and the final chapter describes NMR and other methods used in the book. This text presents a comprehensive description of a large array of hard and soft materials, allowing the analysis of the structure-property relationships and generalities on the interfacial behavior of materials and adsorbates.

This book provides up-to-date information on a wide range of developments in the general and gas chromatographic methods and applications. It presents timely, cutting-edge reviews in the fields of bio-, analytical, organic, polymer, and pharmaceutical chemistry.

Technical advances in probing surface chemistry with photoelectron spectroscopy under ambient pressures and at buried interfaces enables us to capture information on the chemical state under conditions close to real life applications. Meanwhile time-resolved XAS and XES provide the capability of capturing snapshots of the electronic structure of surface states in the femtosecond time regime allowing us to probe reaction pathways with unprecedented precision. There is also a transformation in access to these techniques. These new approaches are changing our understanding of surface chemistry in an extremely diverse range of applications, from device manufacture to in-vivo sensing to catalysis. It is very timely to consider this new knowledge emerging and explore the potential applications of these tools to other areas. Join international leaders in the field as they explore and exchange ideas about the key aspects of surface science, helping to develop the roadmap to shape the surface chemistry landscape for the years ahead. The topics covered include: In-situ methods: discoveries and challenges Buried interfaces Time resolved surface analysis (kinetic and molecular timescales) Future directions

The second edition of this ACOL text, which was first published in 1987, continues to provide the analyst with an excellent introduction to mass spectrometry by the adoption of a practical approach in which the theoretical and operational aspects of this major analytical technique are combined. In the revised edition of this text, the author has expanded upon and reorganised the earlier material in order to bring it completely up to date. In addition to the basic theory of ion formation and behaviour, instrumentation and the interpretation of the spectra of simple organic compounds, this new edition reflects a number of the very important developments which have taken place in this field since the late 1980s. These include the burgeoning area of hyphenated mass spectral techniques, including gas chromatography—mass spectrometry (GC-MS), liquid chromatography—gas chromatography (LC-GS) and tandem mass spectrometry (MS-MS). Associated newer methods of interfacing, such as electrospray and ionspray, particle-beam and continuous flow coupling and atmospheric-pressure chemical ionisation are also covered. The current widespread use of computing techniques in structure elucidation is also considered, along with the important area of inorganic mass spectrometry for analysing surfaces, bulk solids and solutions. Analytical Chemistry By Open Learning This series provides a uniquely comprehensive and integrated coverage of analytical chemistry, covering basic concepts, classical methods, instrumental techniques and applications. The learning objectives of each text are clearly identified and the student’s understanding of the material is constantly challenged by self-assessment questions with reinforcing or remedial responses. The overall objective of Analytical Chemistry by Open Learning is to enable the student to select and apply appropriate methods and techniques to solve analytical problems, and to interpret the results obtained. We are grateful to Dr Roger Taylor of the University of Sussex, UK for supplying the spectrum of fullerene used on the front cover.

The First Book on CRS Microscopy

Compared to conventional Raman microscopy, coherent Raman scattering (CRS) allows label-free imaging of living cells and tissues at video rate by enhancing the weak Raman signal through nonlinear excitation. Edited by pioneers in the field and with contributions from a distinguished team of experts, Coherent Raman Scattering Microscopy explains how CRS can be used to obtain a point-by-point chemical map of live cells and tissues.

In color throughout, the book starts by establishing the foundation of CRS microscopy. It discusses the principles of nonlinear optical spectroscopy, particularly coherent Raman spectroscopy, and presents the theories of contrast mechanisms pertinent to CRS microscopy. The text then provides important technical aspects of CRS microscopy, including microscope construction, detection schemes, and data analyses. It concludes with a survey of applications that demonstrate how CRS microscopy has become a valuable tool in biomedicine.

Due to its label-free, noninvasive examinations of living cells and organisms, CRS microscopy has opened up exciting prospects in biology and medicine from the mapping of 3D distributions of small drug molecules to identifying tumors in tissues. An in-depth exploration of the theories, technology, and applications, this book shows how CRS microscopy has impacted human health and will deepen our understanding of life processes in the future."

A rapidly growing field, vibrational spectroscopy has found applications in industries including pharmaceutical manufacture, food and drug safety, and process monitoring on production lines. In particular, interest in clinical spectroscopy is rising rapidly as researchers recognize the potential of the vibrational spectroscopic techniques-Infrared (IR) and Raman Spectroscopy-as noninvasive tissue diagnosis tools. However, the details of the characteristic peak frequencies and their relationship to specific functional groups present in the biological tissues have not been fully understood. Vibrational Spectroscopy for Tissue Analysis introduces IR and Raman Spectroscopy to those scientists who are either using these spectroscopic techniques to address clinical problems or planning to use spectroscopy to analyze clinical tissues and understand their chemical composition. By compiling the interpretations and understandings of the spectral peaks of the biological molecules in one place, this book aids in the understanding of IR and Raman Spectroscopy, and what these techniques can offer both in early diagnosis of the disease and monitoring of the progression of the disease. Despite the tremendous advances in the field of spectroscopy, where new applications are emerging at the pace of development, there are still areas of research that are crying for further exploration. This book bridges the gap between the spectroscopic research and medical applications.