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Author: Ulrich Kurfürst
Publisher: Springer Science & Business Media
ISBN: 3662037165
Category : Science
Languages : en
Pages : 442
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Book Description
The analysis of solid materials by introducing solid test sampies directly into the graphite furnace of an atomic absorption spectrometer must be regarded as a powerful analytical approach. Even if it is - of course - not the "ultimate method". After three decades of development, the instrumentation and the methodology are available to apply solid sampling successfully for the analysis of almost every material. Moreover, several tasks cannot be solved using other analytical methods as neatly as they can using direct solid sampling. The conventional methods work more or less satisfactorily, so why do we sug gest applying solid sampling much more extensively than it is today? To begin with, the features pointed out time and again should be named: Rapidity of the analytical procedure, low susceptibility to analyte loss or contamination, very smallquantities can be analyzed, and expenditure on instrumentation and per sonell is also low. These properties are examined and the necessary conditions are discussed (Chapter 1) as are the analytical tasks (Chapter 6) for which use of this method is advantageous. Other features that are often overlooked are just as important: The simplicity of the analytical procedures allows the analyst to main tain an intimate relationship with the original scientific task that has to be solved with the analysis. Furthermore, the considerable reduction of working place haz ards and pollution by avoiding the use of chemical reagents must nowadays be assessed as a feature as important as the others.
Author: Ulrich Kurfürst
Publisher: Springer Science & Business Media
ISBN: 3662037165
Category : Science
Languages : en
Pages : 442
Get Book Here
Book Description
The analysis of solid materials by introducing solid test sampies directly into the graphite furnace of an atomic absorption spectrometer must be regarded as a powerful analytical approach. Even if it is - of course - not the "ultimate method". After three decades of development, the instrumentation and the methodology are available to apply solid sampling successfully for the analysis of almost every material. Moreover, several tasks cannot be solved using other analytical methods as neatly as they can using direct solid sampling. The conventional methods work more or less satisfactorily, so why do we sug gest applying solid sampling much more extensively than it is today? To begin with, the features pointed out time and again should be named: Rapidity of the analytical procedure, low susceptibility to analyte loss or contamination, very smallquantities can be analyzed, and expenditure on instrumentation and per sonell is also low. These properties are examined and the necessary conditions are discussed (Chapter 1) as are the analytical tasks (Chapter 6) for which use of this method is advantageous. Other features that are often overlooked are just as important: The simplicity of the analytical procedures allows the analyst to main tain an intimate relationship with the original scientific task that has to be solved with the analysis. Furthermore, the considerable reduction of working place haz ards and pollution by avoiding the use of chemical reagents must nowadays be assessed as a feature as important as the others.
Author: Bernhard Welz
Publisher: John Wiley & Sons
ISBN: 3527606378
Category : Science
Languages : en
Pages : 296
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Book Description
High-resolution continuum source atomic absorption spectrometry (HR-CS AAS) is the most revolutionary innovation since the introduction of AAS in 1955. Here, the authors provide the first complete and comprehensive discussion of HR-CS AAS and its application to the analysis of a variety of difficult matrices. Published just in time with the first commercial instrument available for this new technique, the book is a must for all those who want to know more about HR-CS AAS, and in particular for all future users. The advantages of the new technique over conventional line-source AAS are clearly demonstrated using practical examples and numerous figures, many in full color. HR-CS AAS is overcoming essentially all the remaining limitations of established AAS, particularly the notorious problem of accurate background measurement and correction. Using a continuum radiation source and a CCD array detector makes the spectral environment visible to several tenths of a nanometer on both sides of the analytical line, tremendously facilitating method development and elimination of interferences. Conceived as a supplement to the standard reference work on AAS by B. Welz and M. Sperling, this book does not repeat such fundamentals as the principles of atomizers or atomization mechanisms. Instead, it is strictly focused on new and additional information required to profit from HR-CS AAS. It presents characteristic concentration for flame atomization and characteristic mass data for electrothermal atomization for all elements, as well as listing numerous secondary lines of lower sensitivity for the determination of higher analyte concentrations. The highly resolved molecular absorption spectra of nitric, sulfuric and phosphoric acids, observed in an air-acetylene flame, which are depicted together with the atomic lines of all elements, make it possible to predict potential spectral interferences.
Author: David Watson
Publisher: Woodhead Publishing
ISBN: 9781855737341
Category : Business & Economics
Languages : en
Pages : 708
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Book Description
This wide-ranging text sums up the wealth of recent research on assessing the risks from pesticides, veterinary and other residues in food, and effective means for detecting and controlling them. Part 1 covers targeted and rapid methods for analysing residues in food together with the use of good agricultural practice and HACCP systems in managing them. Part 2 looks at veterinary residues, covering their safety, toxicology and detection. Part 3 examines pesticides, with chapters on surveillance and detection methods for fungicides and herbicides. In the final part, there are chapters summarisi.
Author: G. Schlemmer
Publisher: Birkhäuser
ISBN: 3034875762
Category : Science
Languages : en
Pages : 292
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Book Description
"One should rather go horne and mesh a net than jump into the pond and dive far fishes" (Chinese proverb) Recognizing the precise analytical question and planning the analysis according ly is certainly the first prerequisite for successful trace and ultratrace determina tions. The second prerequisite is to select the method appropriate to the analyti cal specification. The method itself consists of a set of available tools. The third prerequisite is that analysts and operators know the methods weH enough to enjoy challenging themselves as weH as the methods and are rewarded by the joy of high-quality data, fast and economical results and the conviction of having the analytical job under control. This skill is known among analysts or operators working with an exciting new and sometimes complicated analytical technique but is gradually lost on ce a technique becomes "mature" and a routine tool. Unfortunately, laboratory managers often do not allow sufficient training time for their analysts and technicians for "routine" techniques and thus miss an opportunity for motivating their co-workers and obtaining the full benefit of the equipment. Graphite furnace atomic absorption spectrometry (AAS) is one of the mature analytical techniques wh ich is seen as a routine method in most laboratories. More than 10,000 furnaces are operated in elemental trace and ultratrace analy ses in laboratories around the world today.
Author: Henryk Matusiewicz
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110366738
Category : Science
Languages : en
Pages : 460
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Book Description
Highly accurate chemical speciation is of great importance in environmental, clinical, and food sciences, as well as in archaeometry. Trace analysis via atomic spectrometry, mass spectroscopy, gas chromatography, electron microprobing, or X-ray absorption spectroscopy provides detailed information on surface and sub-surface domain of samples. The book comprehensively presents modern techniques, timely application, and data modeling.
Author: C. Minoia
Publisher: Elsevier
ISBN: 1483287602
Category : Science
Languages : en
Pages : 702
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Book Description
The book aims at presenting an exhaustive survey of the applications of Electrothermal Atomization Atomic Absorption Spectrometry (ETA-AAS) with Zeeman background correction in a variety of fields. The unique role played by the technique in solving important analytical problems encountered today is highlighted throughout the 29 chapters which make up this multiauthored work. The overall picture that emerges from this collection of contributions testifies to the maturity reached by this instrumental methodology and lays emphasis on its capabilities, still unrivalled for many elements in terms ofoutstanding detection power afforded and minimal amounts of sample required. After an introductory chapter reviewing the major milestones of ETA-AAS over the decades, with special regard to the history and theory of the Zeeman effect and its use in background correction, the contributions which follow are distributed into four main categories, dealing with the analysis respectively of environmental samples, natural waters, foodstuffs and specimens relevant to clinical and toxicological chemistry. The substantial impact of the technique, as deduced from the literature published so far, as well as its future prospects are outlined in the final paper.
Author: Francisco Pena Pereira
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110427265
Category : Science
Languages : en
Pages : 411
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Book Description
Miniaturization is a challenge thrown down to analytical chemistry. The replacement of conventional analytical systems by miniaturized alternatives during the last years is noticeable. Specifically, the miniaturization of traditional sample preparation techniques (e.g., solid-phase extraction or solvent extraction) led to the development of environmentally benign analytical methods. This book aims to provide an overview of the challenges and achievements inthe application of the miniaturized sample preparation methods in analytical laboratories. It includes both theoretical and practical aspects of miniaturized sample preparation approaches and hence should be of interest to researchers, students and teachers of analytical and bioanalytical chemistry, environmental sciences and environmental engineering.
Author: Miguel de la Guardia
Publisher: John Wiley & Sons
ISBN: 111994094X
Category : Science
Languages : en
Pages : 569
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Book Description
The emerging field of green analytical chemistry is concerned with the development of analytical procedures that minimize consumption of hazardous reagents and solvents, and maximize safety for operators and the environment. In recent years there have been significant developments in methodological and technological tools to prevent and reduce the deleterious effects of analytical activities; key strategies include recycling, replacement, reduction and detoxification of reagents and solvents. The Handbook of Green Analytical Chemistry provides a comprehensive overview of the present state and recent developments in green chemical analysis. A series of detailed chapters, written by international specialists in the field, discuss the fundamental principles of green analytical chemistry and present a catalogue of tools for developing environmentally friendly analytical techniques. Topics covered include: Concepts: Fundamental principles, education, laboratory experiments and publication in green analytical chemistry. The Analytical Process: Green sampling techniques and sample preparation, direct analysis of samples, green methods for capillary electrophoresis, chromatography, atomic spectroscopy, solid phase molecular spectroscopy, derivative molecular spectroscopy and electroanalytical methods. Strategies: Energy saving, automation, miniaturization and photocatalytic treatment of laboratory wastes. Fields of Application: Green bioanalytical chemistry, biodiagnostics, environmental analysis and industrial analysis. This advanced handbook is a practical resource for experienced analytical chemists who are interested in implementing green approaches in their work.
Author: Alfredo Sanz-Medel
Publisher: Momentum Press
ISBN: 1606504371
Category : Technology & Engineering
Languages : en
Pages : 174
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Book Description
Atomic Absorption Spectroscopy (AAS) is a well-established elemental analysis technology. It remains one of the most popular and cost-effective analysis tools used by chemists, physicists, and materials scientists worldwide. This second edition offers a concise introduction to AAS concepts, essential methodologies, and important applications. It has been comprehensively updated for the latest advances in AAS techniques and instruments. Highlights include: • Overviews of all basic atomic absorption concepts, including atomic line spectra theory, common sampling techniques, radiation sources, spectrometers, and detectors; • Coverage of hydride generation, cold vapor generation and electrothermal generation, as well as flow injection analysis (FIA) to enhance AAS analytical performance; • New sections on troubleshooting and quality control guidelines, chemometrics, and emerging fields of applications, including analysis of nanoparticles; and • Selected examples of standards for chemical analysis.
Author: Margaret E. Farago
Publisher: John Wiley & Sons
ISBN: 3527615903
Category : Science
Languages : en
Pages : 302
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Book Description
How do plants react to elements in the soil? A vital question, particulary in today's world of increasing environmental contamination... The answer can be found in this book. It has an extraordinarily broad basis, compiling up-to-date information from numerous specialist disciplines. Key articles are devoted to - Soil Chemistry and Bioavailability - Metal-tolerant Plants - Metalloenzymes - Toxic Effects of Metals - Radionuclides Moreover emphasis is placed on environmental aspects, with detailed considerations of plants that hyperaccumulate heavy metals and plants that are indicators for pollution. A discussion of experimental techniques rounds off the book. They include sampling, sample preparation, analytical methods and aspects of quality assurance. All in all a valuable forum for the exchange of current thinking across a broad spectrum of disciplines.
