Thomas Register
Author:
Publisher:
Published: 2004
Total Pages: 2032
ISBN-13:
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Applications of Gas Chromatography
Author: Adrianna Coty
Publisher:
Published: 2016-04-01
Total Pages: 290
ISBN-13: 9781681172620
DOWNLOAD EBOOKGas chromatography is a term used to describe the group of analytical separation techniques used to analyze volatile substances in the gas phase. In gas chromatography, the components of a sample are dissolved in a solvent and vaporized in order to separate the analyses by distributing the sample between two phases: a stationary phase and a mobile phase. The mobile phase is a chemically inert gas that serves to carry the molecules of the analyze through the heated column. Gas chromatography is one of the sole forms of chromatography that does not utilize the mobile phase for interacting with the analyze. The stationary phase is either a solid adsorbent, termed gas-solid chromatography (GSC), or a liquid on an inert support, termed gas-liquid chromatography (GLC). Helium remains the most commonly used carrier gas in about 90% of instruments although hydrogen is preferred for improved separations. This inert gas goes through a glass column packed with silica that is coated with a liquid. Materials that are less soluble in the liquid will increase the result faster than the material with greater solubility. The purpose of this book entitled Applications of Gas Chromatography is to provide a better understanding on its separation and measurement techniques and its application. Since chromatography techniques are separating and analyzing methods, this book will help other researchers and young scientists to choose a suitable chromatography technique. Furthermore, this book illustrates the newest challenges in this area. This valuable book aims to provide a connection between various chromatography techniques and different processes.
Split and Splitless Injection for Quantitative Gas Chromatography
Author: Konrad Grob
Publisher: John Wiley & Sons
Published: 2008-11-21
Total Pages: 480
ISBN-13: 3527612882
DOWNLOAD EBOOKThis comprehensive and unique handbook of split and splitless injection techniques has been completely revised and updated. This new edition offers: - New insights concerning sample evaporation in the injector - Information about matrix effects - A new chapter on injector design The real processes within the injector are for the first time visualized and explained by the CD-ROM included in the book. Furthermore the reader will understand the concepts of injection techniques and get a knowledge of the sources of error. The handbook also includes many practical guidelines. From reviews of former editions: "This substantial book is on injection techniques alone, which ... demonstrates this can have many pitfalls ... no one should be allowed to direct a laboratory doing quantitative analysis by GC without first being thoroughly familar with this book ..." The Analyst "This is a detailed reference volume filled with practical suggestions and techniques for managing split and splitless injection in the day-to-day world of the working gas chromatographer. It will be useful ... for anyone who must work hands-on with GC." Journal of High Resolution Chromatography
Pain Management and the Opioid Epidemic
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
Published: 2017-09-28
Total Pages: 483
ISBN-13: 0309459575
DOWNLOAD EBOOKDrug overdose, driven largely by overdose related to the use of opioids, is now the leading cause of unintentional injury death in the United States. The ongoing opioid crisis lies at the intersection of two public health challenges: reducing the burden of suffering from pain and containing the rising toll of the harms that can arise from the use of opioid medications. Chronic pain and opioid use disorder both represent complex human conditions affecting millions of Americans and causing untold disability and loss of function. In the context of the growing opioid problem, the U.S. Food and Drug Administration (FDA) launched an Opioids Action Plan in early 2016. As part of this plan, the FDA asked the National Academies of Sciences, Engineering, and Medicine to convene a committee to update the state of the science on pain research, care, and education and to identify actions the FDA and others can take to respond to the opioid epidemic, with a particular focus on informing FDA's development of a formal method for incorporating individual and societal considerations into its risk-benefit framework for opioid approval and monitoring.
Communities in Action
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
Published: 2017-04-27
Total Pages: 583
ISBN-13: 0309452961
DOWNLOAD EBOOKIn the United States, some populations suffer from far greater disparities in health than others. Those disparities are caused not only by fundamental differences in health status across segments of the population, but also because of inequities in factors that impact health status, so-called determinants of health. Only part of an individual's health status depends on his or her behavior and choice; community-wide problems like poverty, unemployment, poor education, inadequate housing, poor public transportation, interpersonal violence, and decaying neighborhoods also contribute to health inequities, as well as the historic and ongoing interplay of structures, policies, and norms that shape lives. When these factors are not optimal in a community, it does not mean they are intractable: such inequities can be mitigated by social policies that can shape health in powerful ways. Communities in Action: Pathways to Health Equity seeks to delineate the causes of and the solutions to health inequities in the United States. This report focuses on what communities can do to promote health equity, what actions are needed by the many and varied stakeholders that are part of communities or support them, as well as the root causes and structural barriers that need to be overcome.
The Rise of China and India in Africa
Author: Fantu Cheru
Publisher: Zed Books Ltd.
Published: 2010-03-11
Total Pages: 300
ISBN-13: 184813827X
DOWNLOAD EBOOKIn recent years, China and India have become the most important economic partners of Africa and their footprints are growing by leaps and bounds, transforming Africa's international relations in a dramatic way. Although the overall impact of China and India's engagement in Africa has been positive in the short-term, partly as a result of higher returns from commodity exports fuelled by excessive demands from both countries, little research exists on the actual impact of China and India's growing involvement on Africa's economic transformation. This book examines in detail the opportunities and challenges posed by the increasing presence of China and India in Africa, and proposes critical interventions that African governments must undertake in order to negotiate with China and India from a stronger and more informed platform.
Standard & Poor's Creditweek
Author:
Publisher:
Published: 1985
Total Pages: 606
ISBN-13:
DOWNLOAD EBOOKStatic Headspace-Gas Chromatography
Author: Bruno Kolb
Publisher: John Wiley & Sons
Published: 2006-04-20
Total Pages: 378
ISBN-13: 0471914568
DOWNLOAD EBOOKSTATIC HEADSPACE-GAS CHROMATOGRAPHY THE ONLY REFERENCE TO PROVIDE BOTH CURRENT AND THOROUGH COVERAGE OF THIS IMPORTANT ANALYTICAL TECHNIQUE Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC. Static Headspace-Gas Chromatography: Theory and Practice has long been the only reference to provide in-depth coverage of this method of analysis. The Second Edition has been thoroughly updated to reflect the most recent developments and practices, and also includes coverage of solid-phase microextraction (SPME) and the purge-and-trap technique. Chapters cover: Principles of static and dynamic headspace analysis, including the evolution of HS-GC methods and regulatory methods using static HS-GC Basic theory of headspace analysis—physicochemical relationships, sensitivity, and the principles of multiple headspace extraction HS-GC techniques—vials, cleaning, caps, sample volume, enrichment, and cryogenic techniques Sample handling Cryogenic HS-GC Method development in HS-GC Nonequilibrium static headspace analysis Determination of physicochemical functions such as vapor pressures, activity coefficients, and more Comprehensive and focused, Static Headspace-Gas Chromatography, Second Edition provides an excellent resource to help the reader achieve optimal chromatographic results. Practical examples with original data help readers to master determinations in a wide variety of areas, such as forensic, environmental, pharmaceutical, and industrial applications.
Pharmaceuticals, Corporate Crime and Public Health
Author: Graham Dukes
Publisher: Edward Elgar Publishing
Published: 2014-06-27
Total Pages: 419
ISBN-13: 1783471107
DOWNLOAD EBOOKThe pharmaceutical industry exists to serve the community, but over the years it has engaged massively in corporate crime, with the public footing the bill. This readable study by experts in medicine, law, criminology and public health documents the pr
