Evaluation Of Inductively Couple Plasma Time Of Flight Mass Spectrometry For Laser Ablation Analyses

Download Evaluation Of Inductively Couple Plasma Time Of Flight Mass Spectrometry For Laser Ablation Analyses full books in PDF, epub, and Kindle. Read online Evaluation Of Inductively Couple Plasma Time Of Flight Mass Spectrometry For Laser Ablation Analyses ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Encyclopedia of Spectroscopy and Spectrometry

Author :
Publisher : Academic Press
ISBN 13 : 0128032251
Total Pages : 3716 pages
Book Rating : 4.1/5 (28 download)

DOWNLOAD NOW!

Book Synopsis Encyclopedia of Spectroscopy and Spectrometry by :

Download or read book Encyclopedia of Spectroscopy and Spectrometry written by and published by Academic Press. This book was released on 2016-09-22 with total page 3716 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition of the Encyclopedia of Spectroscopy and Spectrometry, Three Volume Set provides authoritative and comprehensive coverage of all aspects of spectroscopy and closely related subjects that use the same fundamental principles, including mass spectrometry, imaging techniques and applications. It includes the history, theoretical background, details of instrumentation and technology, and current applications of the key areas of spectroscopy. The new edition will include over 80 new articles across the field. These will complement those from the previous edition, which have been brought up-to-date to reflect the latest trends in the field. Coverage in the third edition includes: Atomic spectroscopy Electronic spectroscopy Fundamentals in spectroscopy High-Energy spectroscopy Magnetic resonance Mass spectrometry Spatially-resolved spectroscopic analysis Vibrational, rotational and Raman spectroscopies The new edition is aimed at professional scientists seeking to familiarize themselves with particular topics quickly and easily. This major reference work continues to be clear and accessible and focus on the fundamental principles, techniques and applications of spectroscopy and spectrometry. Incorporates more than 150 color figures, 5,000 references, and 300 articles for a thorough examination of the field Highlights new research and promotes innovation in applied areas ranging from food science and forensics to biomedicine and health Presents a one-stop resource for quick access to answers and an in-depth examination of topics in the spectroscopy and spectrometry arenas

Encyclopedia of Geochemistry

Author : William M. White
Publisher : Springer
ISBN 13 : 9783319393117
Total Pages : 1680 pages
Book Rating : 4.3/5 (931 download)

DOWNLOAD NOW!

Book Synopsis Encyclopedia of Geochemistry by : William M. White

Download or read book Encyclopedia of Geochemistry written by William M. White and published by Springer. This book was released on 2018-07-24 with total page 1680 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia is a complete and authoritative reference work for this rapidly evolving field. Over 200 international scientists, each experts in their specialties, have written over 330 separate topics on different aspects of geochemistry including geochemical thermodynamics and kinetics, isotope and organic geochemistry, meteorites and cosmochemistry, the carbon cycle and climate, trace elements, geochemistry of high and low temperature processes, and ore deposition, to name just a few. The geochemical behavior of the elements is described as is the state of the art in analytical geochemistry. Each topic incorporates cross-referencing to related articles, and also has its own reference list to lead the reader to the essential articles within the published literature. The entries are arranged alphabetically, for easy access, and the subject and citation indices are comprehensive and extensive. Geochemistry applies chemical techniques and approaches to understanding the Earth and how it works. It touches upon almost every aspect of earth science, ranging from applied topics such as the search for energy and mineral resources, environmental pollution, and climate change to more basic questions such as the Earth’s origin and composition, the origin and evolution of life, rock weathering and metamorphism, and the pattern of ocean and mantle circulation. Geochemistry allows us to assign absolute ages to events in Earth’s history, to trace the flow of ocean water both now and in the past, trace sediments into subduction zones and arc volcanoes, and trace petroleum to its source rock and ultimately the environment in which it formed. The earliest of evidence of life is chemical and isotopic traces, not fossils, preserved in rocks. Geochemistry has allowed us to unravel the history of the ice ages and thereby deduce their cause. Geochemistry allows us to determine the swings in Earth’s surface temperatures during the ice ages, determine the temperatures and pressures at which rocks have been metamorphosed, and the rates at which ancient magma chambers cooled and crystallized. The field has grown rapidly more sophisticated, in both analytical techniques that can determine elemental concentrations or isotope ratios with exquisite precision and in computational modeling on scales ranging from atomic to planetary.

Recent Advances in Laser Ablation ICP-MS for Archaeology

Author : Laure Dussubieux
Publisher : Springer
ISBN 13 : 3662498944
Total Pages : 361 pages
Book Rating : 4.6/5 (624 download)

DOWNLOAD NOW!

Book Synopsis Recent Advances in Laser Ablation ICP-MS for Archaeology by : Laure Dussubieux

Download or read book Recent Advances in Laser Ablation ICP-MS for Archaeology written by Laure Dussubieux and published by Springer. This book was released on 2016-09-05 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores different aspects of LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometry). It presents a large array of new analytical protocols for elemental or isotope analysis. LA-ICP-MS is a powerful tool that combines a sampling device able to remove very small quantities of material without leaving visible damage at the surface of an object. Furthermore, it functions as a sensitive analytical instrument that measures, within a few seconds, a wide range of isotopes in inorganic samples. Determining the elemental or the isotopic composition of ancient material is essential to address questions related to ancient technology or provenance and therefore aids archaeologists in reconstructing exchange networks for goods, people and ideas. Recent improvements of LA-ICP-MS have opened new avenues of research that are explored in this volume.

Determination of Trace Elements

Author : Zeev B. Alfassi
Publisher : Wiley-VCH
ISBN 13 :
Total Pages : 632 pages
Book Rating : 4.:/5 (318 download)

DOWNLOAD NOW!

Book Synopsis Determination of Trace Elements by : Zeev B. Alfassi

Download or read book Determination of Trace Elements written by Zeev B. Alfassi and published by Wiley-VCH. This book was released on 1994-10-17 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of Trace Elements Edited by Zeev B. Alfassi The best way to determine trace elements! This easy-to-use handbook guides the reader through the maze of all modern analytical operations. Each method is described by an expert in the field. The book highlights the advantages and disadvantages of individual techniques and enables pharmacologists, environmentalists, material scientists, and food industry to select a judicious procedure for their trace element analysis.

The Oxford Handbook of Archaeological Ceramic Analysis

Author : Alice M. W. Hunt
Publisher : Oxford University Press
ISBN 13 : 0199681538
Total Pages : 777 pages
Book Rating : 4.1/5 (996 download)

DOWNLOAD NOW!

Book Synopsis The Oxford Handbook of Archaeological Ceramic Analysis by : Alice M. W. Hunt

Download or read book The Oxford Handbook of Archaeological Ceramic Analysis written by Alice M. W. Hunt and published by Oxford University Press. This book was released on 2017 with total page 777 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume draws together topics and methodologies essential for the socio-cultural, mineralogical, and geochemical analysis of archaeological ceramic, one of the most complex and ubiquitous archaeomaterials in the archaeological record. It provides an invaluable resource for archaeologists, anthropologists, and archaeological materials scientists.

Inorganic Mass Spectrometry

Author : Sabine Becker
Publisher : John Wiley & Sons
ISBN 13 : 9780470517208
Total Pages : 514 pages
Book Rating : 4.5/5 (172 download)

DOWNLOAD NOW!

Book Synopsis Inorganic Mass Spectrometry by : Sabine Becker

Download or read book Inorganic Mass Spectrometry written by Sabine Becker and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an exhaustive review of this topic, Inorganic Mass Spectrometry: Principles and Applications provides details on all aspects of inorganic mass spectrometry, from a historical overview of the topic to the principles and functions of mass separation and ion detection systems. Offering a comprehensive treatment of inorganic mass spectrometry, topics covered include: Recent developments in instrumentation Developing analytical techniques for measurements of trace and ultratrace impurities in different materials This broad textbook in inorganic mass spectrometry, presents the most important mass spectrometric techniques used in all fields of analytical chemistry. By covering recent developments and advances in all fields of inorganic mass spectrometry, this text provides researchers and students with information to answer any questions on this topic as well as providing the basic fundamentals for understanding this potentially complex, but increasingly relevant subject.

Practical Guide to ICP-MS

Author : Robert Thomas
Publisher : CRC Press
ISBN 13 : 0824758838
Total Pages : 323 pages
Book Rating : 4.8/5 (247 download)

DOWNLOAD NOW!

Book Synopsis Practical Guide to ICP-MS by : Robert Thomas

Download or read book Practical Guide to ICP-MS written by Robert Thomas and published by CRC Press. This book was released on 2003-12-11 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a field insider with more than 20 years of experience in the development and application of atomic spectroscopy instrumentation, the Practical Guide to ICP-MS offers key concepts and guidelines in a reader-friendly format that is superb for those with limited knowledge of the technique. This reference discusses the fundamental principles, analytical advantages, practical capabilities, and overall benefits of ICP-MS. It presents the most important selection criteria when evaluating commercial ICP-MS equipment and the most common application areas of ICP-MS such as the environmental, semiconductor, geochemical, clinical, nuclear, food, metallurgical, and petrochemical industries.

Photoionization and Photo-Induced Processes in Mass Spectrometry

Author : Ralf Zimmermann
Publisher : John Wiley & Sons
ISBN 13 : 3527335102
Total Pages : 448 pages
Book Rating : 4.5/5 (273 download)

DOWNLOAD NOW!

Book Synopsis Photoionization and Photo-Induced Processes in Mass Spectrometry by : Ralf Zimmermann

Download or read book Photoionization and Photo-Induced Processes in Mass Spectrometry written by Ralf Zimmermann and published by John Wiley & Sons. This book was released on 2021-07-06 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides comprehensive coverage of laser-induced ionization processes for mass spectrometry analysis Drawing on the expertise of the leading academic and industrial research groups involved in the development of photoionization methods for mass spectrometry, this reference for analytical scientists covers both the theory and current applications of photo-induced ionization processes. It places widely used techniques such as MALDI side by side with more specialist approaches such as REMPI and RIMS, and discusses leading edge developments in ultrashort laser pulse desorption, to give readers a complete picture of the state of the technology. Photoionization and Photo-Induced Processes in Mass Spectrometry: Fundamentals and Applications starts with a complete overview of the fundamentals of the technique, covering the basics of the gas phase ionization as well as those of laser desorption and ablation, pulse photoionization, and single particle ionization. Numerous application examples from different analytical fields are described that showcase the power and the wide scope of photo ionization in mass spectrometry. -The first general reference book on photoionization techniques for mass spectrometry -Examines technologies and applications of gas phase resonance-enhanced multiphoton ionization mass spectrometry (REMPI-MS) and gas phase resonance ionization mass spectrometry (RIMS) -Provides complete coverage of popular techniques like MALDI -Discusses the current and potential applications of each technology, focusing on process and environmental analysis Photoionization and Photo-Induced Processes in Mass Spectrometry: Fundamentals and Applications is an excellent book for spectroscopists, analytical chemists, photochemists, physical chemists, and laser specialists.

Laser Ablation ICP-MS in Archaeological Research

Author : Robert J. Speakman
Publisher : UNM Press
ISBN 13 : 9780826332547
Total Pages : 212 pages
Book Rating : 4.3/5 (325 download)

DOWNLOAD NOW!

Book Synopsis Laser Ablation ICP-MS in Archaeological Research by : Robert J. Speakman

Download or read book Laser Ablation ICP-MS in Archaeological Research written by Robert J. Speakman and published by UNM Press. This book was released on 2005 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together for the first time a collection of papers that specifically describe laser ablation, methods for data quantification, and applications to archaeological questions.

Introduction to Environmental Forensics

Author : Brian L. Murphy
Publisher : Academic Press
ISBN 13 : 0124047076
Total Pages : 747 pages
Book Rating : 4.1/5 (24 download)

DOWNLOAD NOW!

Book Synopsis Introduction to Environmental Forensics by : Brian L. Murphy

Download or read book Introduction to Environmental Forensics written by Brian L. Murphy and published by Academic Press. This book was released on 2014-07-30 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of Introduction to Environmental Forensics is a state-of-the-art reference for the practicing environmental forensics consultant, regulator, student, academic, and scientist, with topics including compound-specific isotope analysis (CSIA), advanced multivariate statistical techniques, surrogate approaches for contaminant source identification and age dating, dendroecology, hydrofracking, releases from underground storage tanks and piping, and contaminant-transport modeling for forensic applications. Recognized international forensic scientists were selected to author chapters in their specific areas of expertise and case studies are included to illustrate the application of these methods in actual environmental forensic investigations. This edition provides updates on advances in various techniques and introduces several new topics. - Provides a comprehensive review of all aspects of environmental forensics - Coverage ranges from emerging statistical methods to state-of-the-art analytical techniques, such as gas chromatography-combustion-isotope ratio mass spectrometry and polytopic vector analysis - Numerous examples and case studies are provided to illustrate the application of these forensic techniques in environmental investigations

Mass Spectrometry

Author : Marek Smoluch
Publisher : John Wiley & Sons
ISBN 13 : 1119377307
Total Pages : 450 pages
Book Rating : 4.1/5 (193 download)

DOWNLOAD NOW!

Book Synopsis Mass Spectrometry by : Marek Smoluch

Download or read book Mass Spectrometry written by Marek Smoluch and published by John Wiley & Sons. This book was released on 2019-07-11 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive description of mass spectrometry basics, applications, and perspectives Mass spectrometry is a modern analytical technique, allowing for fast and ultrasensitive detection and identification of chemical species. It can serve for analysis of narcotics, counterfeit medicines, components of explosives, but also in clinical chemistry, forensic research and anti-doping analysis, for identification of clinically relevant molecules as biomarkers of various diseases. This book describes everything readers need to know about mass spectrometry—from the instrumentation to the theory and applications. It looks at all aspects of mass spectrometry, including inorganic, organic, forensic, and biological MS (paying special attention to various methodologies and data interpretation). It also contains a list of key terms for easier and faster understanding of the material by newcomers to the subject and test questions to assist lecturers. Knowing how crucial it is for young researchers to fully understand both the power of mass spectrometry and the importance of other complementary methodologies, Mass Spectrometry: An Applied Approach teaches that it should be used in conjunction with other techniques such as NMR, pharmacological tests, structural identification, molecular biology, in order to reveal the true function(s) of the identified molecule. Provides a description of mass spectrometry basics, applications and perspectives of the technique Oriented to a broad audience with limited or basic knowledge in mass spectrometry instrumentation, theory, and its applications in order to enhance their competence in this field Covers all aspects of mass spectrometry, including inorganic, organic, forensic, and biological MS with special attention to application of various methodologies and data interpretation Includes a list of key terms, and test questions, for easier and faster understanding of the material Mass Spectrometry: An Applied Approach is highly recommended for advanced students, young scientists, and anyone involved in a field that utilizes the technique.

Planar Chromatography - Mass Spectrometry

Author : Teresa Kowalska
Publisher : CRC Press
ISBN 13 : 1498705898
Total Pages : 396 pages
Book Rating : 4.4/5 (987 download)

DOWNLOAD NOW!

Book Synopsis Planar Chromatography - Mass Spectrometry by : Teresa Kowalska

Download or read book Planar Chromatography - Mass Spectrometry written by Teresa Kowalska and published by CRC Press. This book was released on 2015-11-18 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planar Chromatography-Mass Spectrometry focuses on a relatively new approach to chemical analysis in general, and to separation science in particular. It is the first book to systemically cover the theoretical background, techniques, instrumentation, and practical applications of planar chromatography-mass spectrometry as a hyphenated tool of analy

Isotopic Analysis

Author : Frank Vanhaecke
Publisher : John Wiley & Sons
ISBN 13 : 3527650504
Total Pages : 565 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Isotopic Analysis by : Frank Vanhaecke

Download or read book Isotopic Analysis written by Frank Vanhaecke and published by John Wiley & Sons. This book was released on 2012-04-24 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by two very well-known and respected scientists in the field, this excellent practical guide is the first to cover the fundamentals and a wide range of applications, as well as showing readers how to efficiently use this increasingly important technique. From the contents: * The Isotopic Composition of the Elements * Single-Collector ICP-MS * Multi-Collector ICP-MS * Advances in Laser Ablation - Multi-Collector ICP-MS * Correction for Instrumental Mass Discrimination in Isotope Ratio Determination with Multi-Collector ICP-MS * Reference Materials in Isotopic Analysis * Quality Control in Isotope Ratio Applications * Determination of Trace Elements and Elemental Species Using Isotope Dilution ICP-MS * Geochronological Dating * Application of Multi-Collector ICP-MS to Isotopic Analysis in Cosmochemistry * Establishing the Basis for Using Stable Isotope Ratios of Metals as Paleoredox Proxies * Isotopes as Tracers of Elements Across the Geosphere-Biosphere Interface * Archaeometric Applications * Forensics Applications * Nuclear Applications * The Use of Stable Isotope Techniques for Studying Mineral and Trace Element Metabolism in Humans * Isotopic Analysis via Multi-Collector ICP-MS in Elemental Speciation A must-have for newcomers as well as established scientists seeking an overview of isotopic analysis via ICP-MS.

Isotopic Analysis

Author : Frank Vanhaecke
Publisher : John Wiley & Sons
ISBN 13 : 3527328963
Total Pages : 565 pages
Book Rating : 4.5/5 (273 download)

DOWNLOAD NOW!

Book Synopsis Isotopic Analysis by : Frank Vanhaecke

Download or read book Isotopic Analysis written by Frank Vanhaecke and published by John Wiley & Sons. This book was released on 2012-07-10 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by two very well-known and respected scientists in the field, this excellent practical guide is the first to cover the fundamentals and a wide range of applications, as well as showing readers how to efficiently use this increasingly important technique. From the contents: * The Isotopic Composition of the Elements * Single-Collector ICP-MS * Multi-Collector ICP-MS * Advances in Laser Ablation - Multi-Collector ICP-MS * Correction for Instrumental Mass Discrimination in Isotope Ratio Determination with Multi-Collector ICP-MS * Reference Materials in Isotopic Analysis * Quality Control in Isotope Ratio Applications * Determination of Trace Elements and Elemental Species Using Isotope Dilution ICP-MS * Geochronological Dating * Application of Multi-Collector ICP-MS to Isotopic Analysis in Cosmochemistry * Establishing the Basis for Using Stable Isotope Ratios of Metals as Paleoredox Proxies * Isotopes as Tracers of Elements Across the Geosphere-Biosphere Interface * Archaeometric Applications * Forensics Applications * Nuclear Applications * The Use of Stable Isotope Techniques for Studying Mineral and Trace Element Metabolism in Humans * Isotopic Analysis via Multi-Collector ICP-MS in Elemental Speciation A must-have for newcomers as well as established scientists seeking an overview of isotopic analysis via ICP-MS.

Inductively Coupled Plasma-Mass Spectrometry

Author : Howard E. Taylor
Publisher : Elsevier
ISBN 13 : 0080508596
Total Pages : 308 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!

Book Synopsis Inductively Coupled Plasma-Mass Spectrometry by : Howard E. Taylor

Download or read book Inductively Coupled Plasma-Mass Spectrometry written by Howard E. Taylor and published by Elsevier. This book was released on 2000-10-25 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inductively Coupled Plasma-Mass Spectrometry presents a concise A-Z description of inductively coupled plasma-mass spectrometry, written in layman's terms, for use in the solution of trace element analytical chemistry problems. Detailed discussion of sample introduction and data interpretation is provided. Practicing analytical chemists will be able to use this text to familiarize themselves with the principles, approaches, options, pitfalls, and advantages of ICP-MS technology. - Concise and straightforward descriptions of ICP-MS principles and instrumentation, ensuring rapid understanding of the technique and its advantages and limitations - Examples to clarify the operational characteristics of the technology - Drawings and illustrations to clarify principles, techniques, and methodology - Discussions of practical approaches to the solution of specific trace analysis problems with helpful tips on efficiently producing the most accurate and precise data - Easy-to-understand terms, so that new users of the technology will immediately benefit from the information provided - Comprehensive appendixes containing isotopic and interference data - An exhaustive compilation of literature citations for supplemental information

Direct Analysis in Real Time Mass Spectrometry

Author : Yiyang Dong
Publisher : John Wiley & Sons
ISBN 13 : 3527341846
Total Pages : 370 pages
Book Rating : 4.5/5 (273 download)

DOWNLOAD NOW!

Book Synopsis Direct Analysis in Real Time Mass Spectrometry by : Yiyang Dong

Download or read book Direct Analysis in Real Time Mass Spectrometry written by Yiyang Dong and published by John Wiley & Sons. This book was released on 2018-04-09 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clear, comprehensive, and state of the art, the groundbreaking book on the emerging technology of direct analysis in real time mass spectrometry Written by a noted expert in the field, Direct Analysis in Real Time Mass Spectrometry offers a review of the background and the most recent developments in DART-MS. Invented in 2005, DART-MS offers a wide range of applications for solving numerous analytical problems in various environments, including food science, forensics, and clinical analysis. The text presents an introduction to the history of the technology and includes information on the theoretical background, for exampleon the ionization mechanism. Chapters on sampling and coupling to different types of mass spectrometers are followed by a comprehensive discussion of a broad range of applications. Unlike most other ionization methods, DART does not require laborious sample preparation, as ionization takes place directly on the sample surface. This makes the technique especially attractive for applications in forensics and food science. Comprehensive in scope, this vital text: -Sets the standard on an important and emerging ionization technique -Thoroughly discusses all the relevant aspects from instrumentation to applications -Helps in solving numerous analytical problems in various applications, for example food science, forensics, environmental and clinical analysis -Covers mechanisms, coupling to mass spectrometers, and includes information on challenges and disadvantages of the technique Academics, analytical chemists, pharmaceutical chemists, clinical chemists, forensic scientists, and others will find this illuminating text a must-have resource for understanding the most recent developments in the field.

Recent Advances in Analytical Techniques: Volume 4

Author : Atta-ur-Rahman
Publisher : Bentham Science Publishers
ISBN 13 : 9811405107
Total Pages : 210 pages
Book Rating : 4.8/5 (114 download)

DOWNLOAD NOW!

Book Synopsis Recent Advances in Analytical Techniques: Volume 4 by : Atta-ur-Rahman

Download or read book Recent Advances in Analytical Techniques: Volume 4 written by Atta-ur-Rahman and published by Bentham Science Publishers. This book was released on 2020-08-31 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Advances in Analytical Techniques is a series of updates in techniques used in chemical analysis. Each volume presents a selection of chapters that explain different analytical techniques and their use in applied research. Readers will find updated information about developments in analytical methods such as chromatography, electrochemistry, optical sensor arrays for pharmaceutical and biomedical analysis. The fourth volume of the series features six reviews on a variety of techniques with three reviews focusing on applications in food science: Laser Ablation ICP-MS: New Instrumental Developments, Applications and Trends Voltammetric Electronic Tongues Recovery and Purification of Pharmaceuticals Using Nanomaterials Recent Advances in Determination of Pesticides Residues in Food Commodities derived from Fruit and Vegetable Crops. Recent Advances in Analytical Techniques for the Determination of Honey Content and its Products Liquid-based Coordination Polymers in Cashew Nut Shells: an overview on analytical techniques.