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Books > Science & Mathematics > Chemistry > Analytical chemistry > Qualitative analytical chemistry
"Photoelectrochemical Hydrogen Production" describes the principles and materials challenges for the conversion of sunlight into hydrogen through water splitting at a semiconducting electrode. Readers will find an analysis of the solid state properties and materials requirements for semiconducting photo-electrodes, a detailed description of the semiconductor/electrolyte interface, in addition to the photo-electrochemical (PEC) cell. Experimental techniques to investigate both materials and PEC device performance are outlined, followed by an overview of the current state-of-the-art in PEC materials and devices, and combinatorial approaches towards the development of new materials. Finally, the economic and business perspectives of PEC devices are discussed, and promising future directions indicated. Photoelectrochemical Hydrogen Production is a one-stop resource for scientists, students and R&D practitioners starting in this field, providing both the theoretical background as well as useful practical information on photoelectrochemical measurement techniques. Experts in the field benefit from the chapters on current state-of-the-art materials/devices and future directions.
Provides a systematic review of microextraction techniques applied in analytical toxicology. A comprehensive guide for practical implementation of microextraction techniques in forensic, clinical and analytical laboratories. Contains figures and tables for easy understanding and quick adaptation of parameters of microextraction techniques. Fundamentals, development, and applications of microextraction techniques as a sample preparation procedure are discussed in detail. Extremely useful for the researchers and academicians engaged in the analytical method development using microextraction techniques.
Covers the fundamental instrumentation and techniques Discusses HRMS-based phytochemical research details Focuses strictly on the phytochemical considerations
The role of laboratory research and simulations in advancing our understanding of solar system ices (including satellites, KBOs, comets, and giant planets) is becoming increasingly important. Understanding ice surface radiation processing, particle and radiation penetration depths, surface and subsurface chemistry, morphology, phases, density, conductivity, etc., are only a few examples of the inventory of issues that are being addressed by Earth-based laboratory research. As a response to the growing need for cross-disciplinary dialog and communication in the Planetary Ices science community, this book aims to achieve direct dialog and foster focused collaborations among the observational, modeling, and laboratory research communities.
This book highlights recent advances and applications in terahertz (THz) technology, addressing advanced topics such as THz biomedical imaging, pattern recognition and tomographic reconstruction for THz biomedical imaging by machine learning and artificial intelligence, THz imaging radars for autonomous vehicle applications, and THz imaging systems for security and surveillance. It also discusses theoretical, experimental, established and validated empirical work on these topics.
This thesis identifies the turning point in chain length, after which alkanes self-solvate into a folded structure instead of an extended stretched conformation. After this turning point, London dispersion forces rearrange isolated n-alkanes into a particular hairpin-structure, while for shorter chain lengths, a simple stretched conformation is energetically preferred. This thesis can locate the experimental turning point for the first time in an interaction-free manner from measurements of unbranched alkanes at low temperatures in supersonic jet expansions. It contains a detailed analysis of the vibrational Raman spectra of the chain molecules, which is supported by comprehensive quantum chemical simulations. In this way, the detailed balance between inter-chain attraction and conformational flexibility can be quantified. The investigations are complemented by measurements of perfluoroalkanes and similarities and differences between the compounds are discussed. Furthermore, Nils Luttschwager determines the stiffnesses (elastic moduli) of two of the most common industrial polymers: polyethylene and polytetrafluorethylene. He uses in this thesis a sophisticated extrapolation to calculate this value from quantities of their building blocks, showing that the single polymer molecules can be as stiff as a rod of steel.
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.
The isolation and structural characterization of substances present at very low concentrations, as is necessary to satisfy regulatory requirements for pharmaceutical drug degradants and impurities, can present scientific challenges. The coupling of HPLC with NMR spectroscopy has been at the forefront of cutting-edge technologies to address these issues. LC-NMR: Expanding the Limits of Structure Elucidation presents a comprehensive overview of key concepts in HPLC and NMR that are required to achieve definitive structure elucidation with very low levels of analytes. Because skill sets from both of these highly established disciplines are involved in LC-NMR, the author provides introductory background to facilitate readers' proficiency in both areas, including an entire chapter on NMR theory. The much-anticipated second edition provides guidance in setting up LC-NMR systems, discussion of LC methods that are compatible with NMR, and an update on recent hardware and software advances for system performance, such as improvements in magnet design, probe technology, and solvent suppression techniques that enable unprecedented mass sensitivity in NMR. This edition features methods to quantify concentration and assess purity of isolated metabolites on the micro scale and incorporates computational approaches to accelerate the structure elucidation process. The author also includes implementation and application of qNMR and automated and practical use of computational chemistry combined with QM and DFT to predict highly accurate NMR chemical shifts. The text focuses on current developments in chromatographic-NMR integration, with particular emphasis on utility in the pharmaceutical industry. Applications include trace analysis, analysis of mixtures, and structural characterization of degradation products, impurities, metabolites, peptides, and more. The text discusses novel uses and emerging technologies that challenge detection limits as well future directions for this important technique. This book is a practical primary resource for NMR structure determination-including theory and application-that guides the reader through the steps required for isolation and NMR structure elucidation on the micro scale.
Advanced Separations by Specialized Sorbents opens a new window into sorbent materials, presenting fundamental principles for their syntheses and adsorption properties. The book presents advanced techniques used to create specialized sorbents with a wide range of functions that can be used to enhance the separation and/or purification of useful bioactive compounds, heavy metals, dyes, and other substances. It discusses the most recent developments in the field of separation processes, covering specialized sorbents such as monolith cryogels, composite hydrogels, metal-impregnated ion exchangers, and molecularly imprinted polymers. The book provides a comprehensive discussion of the selectivity in separation processes by composite materials based on synthetic polymers/biopolymers and inorganic particles. It is a comprehensive resource for academic and research scientists as well as students interested in the preparation, characterization, and application of specialized sorbents.
For six decades, scientists and researchers have relied on the Advances in Chromatography series for the most up-to date information on a wide range of developments in chromatographic methods and applications. The clear presentation of topics and vivid illustrations for which this series has become known makes the material accessible and engaging to analytical, biochemical, organic, polymer, and pharmaceutical chemists at all levels of technical skill. Key Features: Discusses the basic concepts of affinity chromatography and examines recent developments in this method and related supramolecular separation methods. Outlines the different types of gradient stationary phases and how they have been used in and benefited the field of separation science. Reviews recent trends in detectors for GC, focusing on those that are readily available and seeing wide usage. Addresses peak compression in GELC and offers the reader a plate height equation to work with that incorporates its effects.
This book gathers, in a single resource, knowledge about matrix-assisted laser desorption ionisation (MALDI) mass spectrometry imaging. It includes fundamentals in the MALDI ionisation process, different source geometries and capabilities, detection systems and the latest research and applications in the range of -omics area as well as other broader areas. Chapters will touch on dedicated sample preparation protocols specific for the class of compounds of interest, instrumentation used with strengths and current limitations, strategies for structural analysis and identification and applications. It will be a welcomed addition to the literature in this fast-moving field and provide a guide to new innovations and applications especially in metabolomics and proteomics. With contributions from leading experts, this book will be an authoritative guide to this method. Aimed at postgraduate and professional researchers, in academia and in the industrial market where it has direct application to clinical research. It will be a supporting volume for those just entering the field as well as experienced practitioners.
This book describes the history of and recent developments in cobaltite and the spin-crossover (SC) phenomena. It offers readers an overview of essential research conducted on cobaltite and introduces them to the fundamentals of condensed matter physics research. The book consists of two parts. The first part reviews SC phenomena, covering the fundamental physics of SC phenomena and basic material properties of cobaltite. The second part focuses on recent topics in SC cobaltite, including the optical and dynamical features of cobaltite, thin material fabrication, and thermoelectric properties. The comprehensive coverage and clearly structured topics will especially appeal to newcomers to the field of state-of-the-art research on cobaltite and SC physics.
This thesis demonstrates that an ultralow temperature refrigeration technique called "demagnetisation refrigeration" can be miniaturised and incorporated onto millimeter-sized chips to cool nanoelectronic circuits, devices and materials. Until recently, the lowest temperature ever reached in such systems was around 4 millikelvin. Here, a temperature of 1.2mK is reported in a nanoelectronic device. The thesis introduces the idea that on-chip demagnetization refrigeration can be used to cool a wide variety of nanostructures and devices to microkelvin temperatures. This brings the exciting possibility of discovering new physics, such as exotic electronic phases, in an unexplored regime and the potential to improve the performance of existing applications, including solid-state quantum technologies. Since the first demonstration of on-chip demagnetization refrigeration, described here, the technique has been taken up by other research groups around the world. The lowest on-chip temperature is currently 0.4mK. Work is now underway to adapt the technique to cool other materials and devices, ultimately leading to a platform to study nanoscale materials, devices and circuits at microkelvin temperatures.
This book offers historical and state-of-the-art molecular spectroscopy methods and applications in dynamic compression science, aimed at the upcoming generation in physical sciences involved in studies of materials at extremes. It begins with addressing the motivation for probing shock compressed molecular materials with spectroscopy and then reviews historical developments and the basics of the various spectroscopic methods that have been utilized. Introductory chapters are devoted to fundamentals of molecular spectroscopy, overviews of dynamic compression technologies, and diagnostics used to quantify the shock compression state during spectroscopy experiments. Subsequent chapters describe all the molecular spectroscopic methods used in shock compression research to date, including theory, experimental details for application to shocked materials, and difficulties that can be encountered. Each of these chapters also includes a section comparing static compression results. The last chapter offers an outlook for the future, which leads the next-generation readers to tackling persistent problems.
The 39th Denver Conference on Applications of X-ray Analysis was held July 31-August 4, 1995, at the Sheraton Hotel, Colorado Springs, Colorado. The year 1995 was a special year for the X-ray analysis community, since it represented the 100th anniversary ofthe discovery ofX-rays by Wilhelm Roentgen. In commemoration of this event, the Plenary Session of the conference was entitled "THE ROENTGEN COMMEMORATIVE SESSION:1895-1995, "100 YEARS OF PROGRESS IN X-RA Y SCIENCE AND APPLICATIONS". It is interesting to note that while we celebrate 100 years ofthe use ofX-ray techniques in general, and about 80 years ofX-ray diffraction and spectroscopy in particular, the Denver X-ray Conference has been in place for about half ofthat time period! Like the X-ray methods it represents, the Denver Conference on Applications ofX-ray Analysis has grown and matured, has survived the rigors oftime, and today, provides the worlds' best annual forum for the exchange of experiences and developments in the various fields ofX-ray analysis. Imagine, when the Denver Conference started in 1951, there were no personal computer- in fact, there were no computers, period! There was no SEM, no microprobe, there were no Si(Li) detectors, no transistors, no synchrotrons, Hugo Rietveld was a child, and many members who regularly attend Denver Meetings today, weren't even born yet! As I write this foreword, a copy of volurne 1 of Advances in X-ray Analysis lays in front of me on my desk.
Leading experts discuss the characteristics, advantages, limitations and future aspects of modern spectroscopic techniques for environmental analysis. Demonstrates how these methods can be applied to trace gas detection and assessment. Concentrates on the latest techniques—both laser and non-laser based—which offer advantages for air pollution and gas monitoring as opposed to more conventional methods. Numerous examples of applications illustrate the potential of the techniques backed up by cutting-edge information and representative data.
This volume covers a broad range of topics focusing on atoms, molecules, and clusters interacting in intense laser field, laser induced filamentation, and laser plasma interaction and application. The PUILS series delivers up-to-date reviews of progress in Ultrafast Intense Laser Science, a newly emerging interdisciplinary research field spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the recent developments in ultrafast laser technologies. Each volume compiles peer-reviewed articles authored by researchers at the forefront of each their own subfields of UILS. Every chapter opens with an overview of the topics to be discussed, so that researchers unfamiliar to the subfield, as well as graduate students, can grasp the importance and attractions of the research topic at hand; these are followed by reports of cutting-edge discoveries.
Fourier Transform Infrared microspectroscopy (FTIR) was first developed by William Coblentz in 1905 for analytical purposes. It has been established as a powerful analytical method to analyze a wide range of materials. The most convenient way to analyze the molecular structure was to prepare KBr pellets with small amount of chemical species. Currently, the development of the Universal Attenuated Total Reflectance (UATR) allows the use of ZnSe-Diamond crystal to acquire FTIR spectra directly from the sample with no special preparation. These traditional FTIR analyses have been made with devices capable of performing single measurements, thus, providing a single IR spectrum of the sample. Recent major technological development in FTIR instrumentation was development of microscopes and imaging systems. These devices are now capable of imaging larger sample area, providing not only spectroscopic information but also spatial distributional information. In addition, the development of Focal Point Array (FPA) has made FTIR imaging an emerging area of chemical imaging research. The aim of this book is to summarize in a single document the research work that is being performed using UATR and IR imaging in selected emerging applications in plant materials and biological samples. This book provides the readers new knowledge, updates information, emerging applications, and understanding of the potential use of FTIR Microspectroscopy.
The contributors to this manual are uniformly from those labora- ries routinely using microwave technology to facilitate their processing methods in the various fields of microscopy. The methods and results these authors describe are the tangible evidence that microwaves can be used routinely as the basis for improved sample processing for micr- copy applications. These applications include complete sample proce- ing protocols for light and electron microscopy, decalcification, and immunocytochemistry. The overall time savings, ease of use, and qu- ity of results serve as justification for using microwaves in the labo- tory. The question as to whether there is a "microwave effect" is alluded to, but not discussed in any great detail. When the term microwave technology is used, it is generic and intended to mean equipment designed for laboratory versus household use. Microwave Techniques and Protocols is designed for anyone with a background and experience in sample processing for immunocytoch- istry, decalcification, light microscopy, or electron microscopy, and clearly demonstrates that microwave technology has a place in today's laboratory. Richard T. Giberson, Richard S. Demaree Jr., REFERENCES Giberson, R. T. Demaree, R. S., and (1995) Microwave fixation: understa- ing the variables to achieve rapid reproducible results. Microsc Res Tech 32:246-254. Giberson, R. T., Demaree, R. S., Jr., and Nordhausen, R. W. (1997) Four-hour processing of clinical/diagnostic specimens for electron microscopy using microwave technique. J Vet Diagn Invest 9:61-67. Jr. VhD Ms vi Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CRC Handbook of Chromatography: Carbohydrates, Volume II updates the first volume, continuing coverage of literature published from 1979 to 1989. Tabulated for easy reference and thoroughly documented, it presents the comprehensive data for all chromatographic techniques applicable to carbohydrates. It features glycoproteins, proteoglycans, and glycolipids, as well as mono-, oligo-, and polysaccharides. This important text emphasizes novel chromatographic methods. Highlights of this superb work include the diversity of HPLC methods applicable to carbohydrates, and the use of some new techniques, including supercritical fluid chromatography and ion chromatography in carbohydrate analysis. Readers discover the latest detection methods, degradative processes, and derivatization techniques. Detailed chapters cover topics such as spectroscopic techniques, electrochemistry, and gas chromatography. This easy-to-use volume provides an excellent working manual and reference book for researchers in the fields of carbohydrate chemistry and biochemistry. CRC Handbook of Chromatography, Carbohydrates: Volume II is an absolute must for all analysts working for industries concerned with carbohydrates.
Micro-X-ray fluorescence offers the possibility for a position- sensitive and non-destructive analysis that can be used for the analysis of non-homogeneous materials and layer systems. This analytical technique has shown a dynamic development in the last 15 years and is used for the analysis of small particles, inclusions, of elemental distributions for a wide range of different applications both in research and quality control. The first experiments were performed on synchrotrons but there is a requirement for laboratory instruments which offers a fast and immediate access for analytical results. The book discuss the main components of a -XRF instrument and the different measurement modes, it gives an overview about the various instruments types, considers the special requirements for quantification of non-homogeneous materials and presents a wide range of application for single point and multi-point analysis as well as for distribution analysis in one, two and three dimensions.
"...a comprehensive and well written book, which...will be useful reading for both researchers entering the field and experienced specialists looking for new ideas....a valuable and long-lasting contribution to experimental mechanics." - Stepan Lomov, KU Leuven This expert volume, an enhanced Habilitation thesis by the head of the Materials Testing Research Group at the University of Augsburg, provides detailed coverage of a range of inspection methods for insitu characterization of fiber-reinforced composites. The failure behavior of fiber reinforced composites is a complex evolution of microscopic damage phenomena. Beyond the use of classical testing methods, the ability to monitor the progression of damage insitu offers new ways to interpret the materials failure modes. Methods covered include digital image correlation, acoustic emission, electromagnetic emission, computed tomography, thermography, shearography, and promising method combinations. For each method, the discussion includes operational principles and practical applications for quality control as well as thoughtful assessment of the method's strengths and weakness so that the reader is equipped to decide which method or methods are most appropriate in a given situation. The book includes extensive appendices covering common experimental parameters influencing comparability of acoustic emission measurements; materials properties for modeling; and an overview of terms and abbreviations.
This book discusses the theoretical foundations of the structural modeling method applied to metamaterials. This method takes into account the parameters of the crystal lattice, the size of the medium particles, as well as their shape and constants of force interactions between them. It provides mathematical models of metamaterials that offer insights into the qualitative influence of the local structure on the effective elastic moduli of the considered medium and into performing theoretical estimations of these quantities. This book is useful for researchers working in the fields of solid mechanics, physical acoustics, and condensed matter physics, as well as for graduate and postgraduate students studying mathematical modeling methods.
As one of the most extensive and important protein post-translational modifications, glycosylation plays a vital role in regulating organisms and is associated with various physiological and pathological processes. Recently, researchers have focused on the need to characterize protein glycosylation sites, structures, and their degree of modification, to better understand their biological functions while also looking for potential biomarkers for diagnosis and treatment of disease. Mass spectrometry (MS) is one of the most powerful tools used to study biomolecules including glycoproteins and glycans. With the continuous development of glycoproteomics and glycomics based on MS analysis, more techniques have evolved and contribute to understanding the structure and function of glycoproteins and glycans. This book reviews advancements achieved in MS-based glycoproteomic analysis, including a wide range of analytical methodologies and strategies involved in selective enrichment; as well as qualitative, quantitative, and data analysis, together with their clinical applications. Significant examples are discussed to illustrate the principles, laboratory protocols, and advice for key implementation to ensure successful results. Mass Spectrometry-Based Glycoproteomics and Its Clinic Application will serve as a valuable resource to elucidate new techniques and their applications for students, postdocs, and researchers working in proteomics, glycoscience, analytical chemistry, biochemistry, and clinical medicine. Editor: Haojie Lu is a professor at Fudan University, specializing in proteomics based on mass spectrometry with particular emphasis on novel technologies for separation and identification of low-abundant proteins and post-translationally modified proteins (including glycosylation), as well as relative and absolute quantification methods for proteomics.
The book presents recent developments in the field of composites, investigated by Broadband Dielectric Spectroscopy (BDS) and sheds a special focus on nanocomposites. This volume compares the results obtained by BDS with data from other methods like hyphenated calorimetry, dynamical-mechanical spectroscopy, NMR spectroscopy and neutron scattering. The addressed systems range from all kinds of model systems, such as polymers filled with spherical silica particles, advanced materials such as polymers with molecular stickers or hyperbranched polymer-based matrices to industrially significant systems, like epoxy-based materials. The book offers an excellent insight to a valuable application of dielectric spectroscopy and it is a helpful guide for every scientist who wants to study dynamics in composite materials. |
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