Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 written by Charles M. Guttman and published by Createspace Independent Publishing Platform. This book was released on 2003-11-30 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes certification of the Mw of SRM 2888, a polystyrene (PS), by light scattering. As supplemental numbers, the Mn by NMR end group analysis and the Mw, Mn and the MMD by MALDI-TOF-MS are also given. SRM 2888 was prepared commercially for NIST Polymers Division for use as a standard for Size Exclusion Chromatography and as a narrow distribution polymer standard with well-defined classical molecular mass moments for comparative studies by MALDI-MS. This material was specially prepared and characterized for well-defined end groups. After packaging of this material for future distribution, the Mw was determined by light scattering and Mn determined by solution NMR. End groups were further studied by FTIR and MALDI-TOF-MS. The MMD was studied by MALDI-TOF-MS. The bottle-to-bottle homogeneity of this Standard Reference Material (SRM) was examined by size exclusion chromatography (SEC).
Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 written by nist and published by Createspace Independent Publishing Platform. This book was released on 2013-12-12 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The certification of a polystyrene standard reference material, SRM 2888, is described. The Mw of SRM 2888 was determined by light scattering to be 7.19 x 10+3 g/mol with a sample standard deviation of 0.14 x 10+3 g/mol. A combined expanded uncertainty for this light scattering Mw determination, including systematic and random uncertainties, was estimated to be 0.57 x 10+3 g/mol. Mn was determined by NMR analysis of the end groups and found to be 7.05 x 10+3 g/mol with an estimated expanded uncertainty of 0.55 x 10+3 g/mol. Fourier transform infrared spectroscopy (FTIR) and matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS) were used to analyze end groups on the polymer. The polystyrene was analyzed by MALDI-TOF-MS for the number (Mn) and mass (Mw) average of the molecular mass distribution (MMD) as well as the MMD. The bottle-to-bottle variation of the SRM was checked by size exclusion chromatography (SEC) and found to be negligible.This polymer was also used in an interlaboratory comparison of MALDI-TOF-MS of synthetic polymers. The interlaboratory comparison and its results are described. Agreement between the MMD moments obtained by light scattering and NMR and the moments of the MMD obtained by MALDI in the interlaboratory comparison is found to be good overall. However, all the experimental values obtained by MALDITOF- MS fell below the classical values.
Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 Classic Reprint written by Charles M. Guttman and published by Forgotten Books. This book was released on 2018-03-28 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Certification of a Polystyrene Synthetic Polymer, Srm 2888 The PS used for this srm was prepared commercially by Polymer Source (dorval, Quebec, Canada). The polymer was specially prepared by anionic polymerization with well - defined styrene and tertiary butyl end groups. From the preparation chemistry, the polymer is expected to be an atactic polystyrene of the form. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book MALDI Mass Spectrometry for Synthetic Polymer Analysis written by Liang Li and published by John Wiley & Sons. This book was released on 2009-10-22 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles and Practices of Polymer Mass Spectrometry helps readers acquire the skills necessary for selecting the optimal methods, handling samples, analyzing the data, and interpreting the results of the mass spectrometry of polymers. This guide describes the principles of polymer MS and best practices in polymer characterization. It discusses different approaches, including MALDI, ESI, TOF MS, and FT-MS. It provides a guide to developing appropriate sample preparation protocols for different polymers. Complete with examples of applications and experiments, this is an excellent reference for scientists, researchers, graduate students, and others.
Download or read book Handbook of Solid Phase Microextraction written by Janusz Pawliszyn and published by Elsevier. This book was released on 2011-11-29 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relatively new technique of solid phase microextraction (SPME) is an important tool to prepare samples both in the lab and on-site. SPME is a "green" technology because it eliminates organic solvents from analytical laboratory and can be used in environmental, food and fragrance, and forensic and drug analysis. This handbook offers a thorough background of the theory and practical implementation of SPME. SPME protocols are presented outlining each stage of the method and providing useful tips and potential pitfalls. In addition, devices and fiber coatings, automated SPME systems, SPME method development, and In Vivo applications are discussed. This handbook is essential for its discussion of the latest SPME developments as well as its in depth information on the history, theory, and practical application of the method. Practical application of Solid Phase Microextraction methods including detailed steps Provides history of extraction methods to better understand the process Suitable for all levels, from beginning student to experienced practitioner
Download or read book Introduction to Forensic Chemistry written by Kelly M. Elkins and published by CRC Press. This book was released on 2018-09-03 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry/Forensic Science Forensic chemistry is a subdiscipline of forensic science, its principles guide the analyses performed in modern forensic laboratories. Forensic chemistry’s roots lie in medico-legal investigation, toxicology and microscopy and have since led the development of modern forensic analytic techniques and practices for use in a variety of applications. Introduction to Forensic Chemistry is the perfect balance of testing methods and application. Unlike other competing books on the market, coverage is neither too simplistic, nor overly advanced making the book ideal for use in both undergraduate and graduate courses. The book introduces chemical tests, spectroscopy, advanced spectroscopy, and chromatography to students. The second half of the book addresses applications and methods to analyze and interpret controlled substances, trace evidence, questioned documents, firearms, explosives, environmental contaminants, toxins, and other topics. The book looks at innovations in the field over time including the latest development of new discernible chemical reactions, instrumental tools, methods, and more. Key features: Nearly 300 full-color figures illustrating key concepts and over 20 case studies Addresses all the essential topics without extraneous or overly advanced coverage Includes full pedagogy of chapter objectives, key terms, lab problems, end of chapter questions, and additional readings to emphasize key learning points Includes chemical structures and useful spectra as examples Fulfils the forensic chemistry course requirement in FEPAC-accredited programs Includes a chapter on Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) materials Comprehensive and accessible, without being overly technical, Introduction to Forensic Chemistry will be a welcome addition to the field and an ideal text designed for both the student user and professor in mind. Course ancillaries including an Instructor’s Manual with Test Bank and chapter PowerPoint® lecture slides are available with qualified course adoption.
Download or read book Advances in Bioprocess Engineering and Technology written by Doraiswami Ramkrishna and published by Springer Nature. This book was released on 2020-09-29 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select peer-reviewed proceedings of the International Conference on Advances in Bioprocess Engineering and Technology (ICABET 2020). The book covers all aspects of bioprocesses, especially related to fermentation technology, food technology, environmental biotechnology, and sustainable energy. Along with this primary theme, the focus is on recent advances in bioprocessing research such as biosensors, micro-reactors, novel separation techniques, bioprocess control, bio-safety, advanced techniques for waste to wealth generation, and nanobiotechnology. This contents are divided according to the major themes of the conference: (i) Fermentation Technology and Bioreactor, (ii) Food Pharmaceuticals and Health care, (iii) Environment and Agriculture, and (iv) Sustainable Energy. This book is intended to help students, researchers, and industry professionals acquire knowledge on innovative technologies and recent advancements in the field of bioprocess engineering and technology.
Download or read book Pollutants from Energy Sources written by Rashmi Avinash Agarwal and published by Springer. This book was released on 2018-11-01 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses different aspects of energy consumption and environmental pollution, describing in detail the various pollutants resulting from the utilization of natural resources and their control techniques. It discusses diagnostic techniques in a simple and easy-to-understand manner. It will be useful for engineers, agriculturists, environmentalists, ecologists and policy makers involved in area of pollutants from energy, environmental safety, and health sectors.
Download or read book Handbook of Environmental Engineering Calculations 2nd Ed written by C. C. Lee and published by McGraw Hill Professional. This book was released on 2007-06-08 with total page 1793 pages. Available in PDF, EPUB and Kindle. Book excerpt: Take Advantage of the Latest Calculation Methods for Solving Problems in Every Major Area of Environmental Engineering The only hands-on reference of its kind, the Handbook of Environmental Engineering Calculations equips you with step-by-step calculation procedures covering virtually every aspect of environmental engineering. Designed to give you quick access to essential information, the updated Second Edition of this unique guide now presents the latest methods for solving a wide range of specific problems, together with worked-out examples that include numerical results for the calculations. Written by a team of environmental experts from both the private and public sectors, this easy-to-use reference provides you with complete calculations for water quality assessment and control...solid waste materials ... and air pollution control. Filled with 200 helpful illustrations, the Second Edition features: Hundreds of detailed examples and calculations with fully illustrated steps Calculations covering every aspect of environmental engineering Both SI and U.S. customary units presented throughout New to this edition: new sections on fuel cells and air toxic risk assessment Inside This State-of-the-Art Environmental Engineering Toolkit • Calculations of Water Quality Assessment and Control • Solid Waste Calculations • Air Pollution Control Calculations • Air Toxic Risk Assessment • Fuel Cell Technologies
Download or read book Energetic Polymers written by How Ghee Ang and published by John Wiley & Sons. This book was released on 2012-03-26 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date overview provides the latest information on the performance, sensitivity, strength and processability aspects of propellants and explosive formulations, with the nature of polymer binder/plasticizer as the variable factor. Apart from applications, this monograph explores the principles behind energetic polymers, while discussing the synthetic routes and energetic characteristics of individual family of energetic polymers. Furthermore, a number of case studies illustrate the role of energetic polyerms on enhancing the performance of formulations as compared to their inert counterparts. The emphasis is on safety throughout, with practical guidance on how to safely handle and formulate energetic polymer based formulations. With the advent of a new generation of energetic polymers, this book is relevant to industry and defense organizations as well as for academic research.
Download or read book Mass Spectrometry of Polymers written by Giorgio Montaudo and published by CRC Press. This book was released on 2001-10-29 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mass Spectrometry (MS) has rapidly become an indispensable tool in polymer analysis, and modern MS today complements in many ways the structural data provided by Nuclear Magnetic Resonance (NMR) and Infrared (IR) methods. Recent advances have sparked a growing interest in this field and established a need for a summary of progress made and results
Download or read book Encyclopedia of Aquatic Ecotoxicology written by Jean-Francois Férard and published by Springer. This book was released on 2013-06-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its 104 chapters, this Encyclopedia of aquatic ecotoxicology reveals the diversity of issues, problems and challenges that have faced, and are facing today, receiving environments. It also indicates ways by which tools, strategies and future investigations can contribute to correct, minimize, solve and prevent water quality degradation. Structured homogeneously, the chapters convey salient information on historical background, features, characteristics, uses and/or applications of treated topics, often complemented by illustrations and case studies, as well as by conclusions and prospects. This work is most suitable for teaching purposes. Academics, for example, could literally deliver comprehensive lectures to students simply based on chapter outlines and contents. Meet the Authors of the Encyclopedia! Check out 'Meet the Authors' under ADDITIONAL INFORMATION (Right menu).
Download or read book Solid Phase Microextraction written by Sue Ann Wercinski and published by CRC Press. This book was released on 1999-07-09 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: An explanation of proven methods of chemical analysis, focusing on the myriad applications of solid phase microextraction (SPME) to laboratories performing high-sample throughput, quick sample turnaround time, low detection levels, and dirty sample matrices. It supplies commentary on developments in SPME technology from its inventor, Janusz Pawliszyn.
Download or read book Reporting company section written by United States. Environmental Protection Agency. Office of Toxic Substances and published by . This book was released on 1979 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Techniques for Analyzing Food Aroma written by Ray Marsili and published by CRC Press. This book was released on 1996-11-05 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers important methods and recent developments in food-aroma analysis. The text discusses the problem-solving capabilities of analytical methods for food flavours and aromas, showing how to select appropriate techniques for resolving the problems of major food trends. It includes a treatment of off-flavour and malodor analyses and new polymer sensor array instruments.
Download or read book FLOWMAP MICROFLUIDICS ROADMAP FOR THE LIFE SCIENCES written by JENS. DUCREE and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dehydrobenzene and Cycloalkynes written by Reinhard W. Hoffmann and published by Elsevier. This book was released on 2012-12-02 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dehydrobenzene and Cycloalkynes deals with the problems associated with the production and reactions of dehydrobenzene and of the related fields of dehydroheterocycles and cycloalkynes. This book also describes the various synthetic applications of dehydrobenzene and provides a list of reactions in which dehydrobenzene occurs as an intermediary. The text explains the generation of dehydrobenzene by cleavage of cyclic systems, by photolytic methods, and by free radical reactions. Nucleophilic and electrophilic monodentate attacks on dehydrobenzene, as well as, bidentate additions to dehydrobenzene yielding cycloadducts. The book also notes that dehydrobenzene is not only a transition state but can be an intermediate of characteristic selectivity and lifetime. The reactions of dehydrobenzene in the gaseous phase affirm that the existence of dehydrobenzene is not restricted to the presence of a solvation shell. The researcher can then study the molecular structure of dehydrobenzene when its existence has been fully established. The text also extends the principle that the dehydroaromatic intermediates can be obtained by abstracting two adjacent hydrogen atoms from an aromatic substrate different from the 1- and 2- positions to arrive at a 1,3- and 1,4-dehydrobenzene. Researchers and scientists whose works are associated with organic chemistry, analytical chemistry, molecular physics or physical chemistry will find this book valuable.
