Download or read book Flow Injection Spectrophotometric Determination of Formaldehyde Using New Color Reaction written by Sara Keiko Murase Fernández and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Formaldehyde (HCHO) is the most common air pollutant of the aldehyde family. It is known to be a toxic and carcinogenic compound present in both residential indoor and industrial environments. Exposition to formaldehyde in higher concentrations (over 0,1 ppmv) can cause well-known effects as irritation of the eyes and upper respiratory tract, headache, nausea, difficulty in breathing, allergic skin reactions, among others. Rapid and reliable methods are still required for the determination of formaldehyde, so the objective of this project is to develop an affordable, cost-effective and easy-to-use flow based spectrophotometric method for the measurement of formaldehyde (HCHO) in liquid samples. This Flow Injection Analysis (FIA) provides advantages as reproducibility, simplicity, low cost, flexibility and high sensitivity that previous batch-wise assays didn't have. Previous research has been carried out to find a suitable chemical basis and referring to previous papers of chemical journals the reaction will be held between hydroxyl ammonium sulfate and the analyte, formaldehyde. After this, a reaction between exceeds of hydroxyl ammonium sulfate, Fe(III) and a ligand will take place. A colored-complex will be produced. To determine the concentration of formaldehyde an indirect analysis is done. The decrease of the colored-complex compound is proportional to the concentration of formaldehyde. The flow-based system will be studied and developed to obtain the optimum work conditions. Studied parameters will be: temperature in reaction coil, length of reaction coils, flow rate, pH of buffer, and concentration of reagents. Under the optimum conditions the calibration curve will be determined. The reliability of the system will be checked by the analysis of industrial waste water that contains formaldehyde and compared to a standard method. As direct application of the system is the analysis of industrial wastewater it will be necessary a study of interference compounds. Results of the study accomplish the prospects above mentioned. The system is a reliable flowbased spectrophotometric method for the easy and rapid determination of the concentration of formaldehyde. Moreover it is a highly sensitive system with high repeatability that has no significant difference in results compared to a standard method.
Download or read book Index Medicus written by and published by . This book was released on 2003 with total page 2004 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Spectrophotometric Flow Injection Analysis written by A. Alwehaid and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Injection Analysis of Food Additives written by Claudia Ruiz-Capillas and published by CRC Press. This book was released on 2015-12-01 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow Injection Analysis of Food Additives gives you the tools you need to analyze food and beverage additives using FIA. This sets it apart from other books that simply focus on the theoretical basis and principles of FIA or on the design of equipment, instrumentation, manifold, and setting mechanism. Truly unprecedented in its scope, this book rep
Download or read book Separation Preconcentration and Spectrophotometry in Inorganic Analysis written by Z. Marczenko and published by Elsevier. This book was released on 2000-10-18 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectrophotometry enables one to determine, with good precision and sensitivity, almost all the elements present in small and trace quantities of any material. The method is particularly useful in the determination of non-metals and allows the determination elements in a large range of concentrations (from single % to low ppm levels) in various materials.In Separation, Preconcentration and Spectrophotometry in Inorganic Analysis, much attention has been paid to separation and preconcentration methods, since they play an essential role in increasing the selectivity and sensitivity of spectrophotometric methods. Separation and preconcentration methods have also been utilised in other determination techniques.Spectrophotometric methods which are widely used for the determination of the elements in a large variety of inorganic materials are presented in the book whilst separation and preconcentration procedures combined with spectrophotometry are also described. This book contains recent advances in spectrophotometry, detailed discussion of the instrumentation, and the techniques and reagents used for spectrophotometric determination of elements in a wide range of materials as well as a detailed discussion of separation and preconcentration procedures that precede the spectrophotometric detection.
Download or read book TRAC Trends in Analytical Chemistry written by U A Th Brinkman and published by Elsevier. This book was released on 2013-09-17 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRAC: Trends in Analytical Chemistry, Volume 10 presents relevant topics in global analytical chemistry research. This book discusses the potential of flow injection analysis for water quality monitoring. Organized into 27 parts encompassing 67 chapters, this book begins with an overview of the amount of published information on analytical chemistry research. This text then examines the analytical technique in the electrophoretic separations in narrow bore tubes, which is capable of rapid, high-resolution separations of water-soluble components in small sample volumes. Other chapters consider the application of polynomial and B-spline interpolation to the description of cyclic voltammetric features. This book discusses as well the methods used to investigate the properties of ceramic high-transition-temperature superconductors. The final chapter deals with the importance of monitoring and protecting the environment based on measurement campaigns. This book is a valuable resource for analytical chemists, environmental chemists, and biochemists. Pharmacologists, scientists, students, researcher workers, and other practitioners will also find this book useful.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Alcoholic Beverages written by Alan J. Buglass and published by John Wiley & Sons. This book was released on 2011-01-13 with total page 1207 pages. Available in PDF, EPUB and Kindle. Book excerpt: HANDBOOK OF ALCOHOLIC BEVERAGES A comprehensive two-volume set that describes the science and technology involved in the production and analysis of alcoholic beverages HANDBOOK OF ALCOHOLIC BEVERAGES Technical, Analytical and Nutritional Aspects At the heart of all alcoholic beverages is the process of fermentation, particularly alcoholic fermentation, whereby sugars are converted to ethanol and many other minor products. The Handbook of Alcoholic Beverages tracks the major fermentation process, and the major chemical, physical and technical processes that accompany the production of the world’s most familiar alcoholic drinks. Indigenous beverages and small-scale production are also covered to a significant extent. The overall approach is multidisciplinary, reflecting the true nature of the subject. Thus, aspects of biochemistry, biology (including microbiology), chemistry, health science, nutrition, physics and technology are all necessarily involved, but the emphasis is on chemistry in many areas of the book. Emphasis is also on more recent developments and innovations, but there is sufficient background for less experienced readers. The approach is unified, in that although different beverages are dealt with in different chapters, there is extensive cross-referencing and comparison between the subjects of each chapter. Appropriate for food professionals working in the development and manufacture of alcohol-based drinks, as well as academic and industrial researchers involved in the development of testing methods for the analysis and regulation of alcohol in the drinks industry. Divided into five parts, this comprehensive two-volume work presents: INTRODUCTION, BACKGROUND AND HISTORY: a simple introduction to the history and development of alcohol and some recent trends and developments. FERMENTED BEVERAGES: BEERS, CIDERS, WINES AND RELATED DRINKS: the latest innovations and aspects of the different fermentation processes used in beer, wine, cider, liqueur wines, fruit wines, low-alcohol and related beverages. SPIRITS: covers distillation methods and stills used in the production of whisky, cereal- and cane-based spirits, brandy, fruit spirits and liqueurs. ANALYTICAL METHODS: covering the monitoring of processes in the production of alcoholic beverages, as well as sample preparation, chromatographic, spectroscopic, electrochemical, physical, sensory and organoleptic methods of analysis. NUTRITION AND HEALTH ASPECTS RELATING TO ALCOHOLIC BEVERAGES: includes a discussion on nutritional aspects, both macro- and micro-nutrients, of alcoholic beverages, their ingestion, absorption and catabolism, the health consequences of alcohol, and details of the additives and residues within the various beverages and their raw materials.
Download or read book Comprehensive Water Analysis written by T R Crompton and published by CRC Press. This book was released on 2003-09-02 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together in one place all available information on the determination of metals, organics, organometallic compounds, anions, cations, dissolved gases, radioactive substances and miscellaneous determinands in natural and treated waters.
Download or read book Research Journal of the Water Pollution Control Federation written by and published by . This book was released on 1991 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Formaldehyde and Cognition written by Rongqiao He and published by Springer. This book was released on 2019-06-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces important, new knowledge regarding formaldehyde, especially endogenous formaldehyde, revealing its many key roles in the human body. It reviews the relationship between endogenous formaldehyde and cognition as well as age-related cognitive impairment, by discussing different aspects such as formaldehyde metabolism, its function in the brain, links with epigenetics and neurophysiology, and epidemiological and clinical investigations. The author also provides suggestions on how to prevent cognitive impairment resulting from excess endogenous formaldehyde. This book appeals to all readers who are interested in cognitive science and toxicology.
Download or read book Ultra Performance Liquid Chromatography Mass Spectrometry written by Mu Naushad and published by CRC Press. This book was released on 2014-03-18 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unique collection of up-to-date UPLC-MS/MS (ultra performance liquid chromatography-tandem mass spectrometric) methods for the separation and quantitative determination of pesticides, capsaicinoids, heterocyclic amines, aflatoxin, perfluorochemicals, acrylamide, procyanidins and alkaloids, lactose content, phenolic compounds, vitamins, and aroma and flavor compounds in a wide variety of foods and food products. 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.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1966 with total page 1548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Seawater Analysis written by Klaus Grasshoff and published by John Wiley & Sons. This book was released on 2009-07-30 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the book first appeared in 1976, Methods of Seawater Analysis has found widespread acceptance as a reliable and detailed source of information. Its second extended and revised edition published in 1983 reflected the rapid pace of instrumental and methodological evolution in the preceding years. The development has lost nothing of its momentum, and many methods and procedures still suffering their teething troubles then have now matured into dependable tools for the analyst. This is especially evident for trace and ultra-trace analyses of organic and inorganic seawater constituents which have diversified considerably and now require more space for their description than before. Methods to determine volatile halocarbons, dimethyl sulphide, photosynthetic pigments and natural radioactive tracers have been added as well as applications of X-ray fluorescence spectroscopy and various electrochemical methods for trace metal analysis. Another method not previously described deals with the determination of the partial pressure of carbon dioxide as part of standardised procedures to describe the marine CO2 system.
Download or read book Spot Tests in Inorganic Analysis written by F. Feigl and published by Elsevier. This book was released on 2012-12-02 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many years have passed since the last edition of the present book was published. The discovery during this period of many new reagents has resulted in a vast accumulation of data on their application and made this completely revised edition necessary.Numerous new tests and various new chapters have been added. Chapters 3,4 and 5 of the fifth edition have been combined into one chapter, which is divided into sections devoted to the elements. These sections are arranged in alphabetical order to make for easier location of information on a given element. To further improve the usefulness of the volume, a reference list has been provided for each sub-section followed by a biography of the appropriate quantitative methods.
Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Indoor Environment written by Lidia Morawska and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the fundamentals of air-borne particles and settled dust in the indoor environment, this handy reference investigates: * relevant definitions and terminology, * characteristics, * sources, * sampling techniques and instrumentation, * exposure assessment, * monitoring methods. The result is a useful and comprehensive overview for chemists, physicists and biologists, postgraduate students, medical practitioners, occupational health professionals, building owners and managers, building, construction and air-conditioning engineers, architects, environmental lawyers, government and regulatory professionals.
