Laser Ablation Ion-storage Time-of-flight Mass Spectrometry PDF Download
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Author:
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Category :
Languages : en
Pages : 5
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
Author:
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ISBN:
Category :
Languages : en
Pages : 18
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Book Description
A laser ablation/ionization mass spectrometer system is described for the direct analysis of solids, particles, and fibers. The system uses a quadrupole ion trap operated in an ion-storage (IS) mode, coupled with a reflectron time-of-flight mass spectrometer (TOF-MS). The sample is inserted radially into the ring electrode and an imaging system allows direct viewing and selected analysis of the sample. Measurements identified trace contaminants of Ag, Sn, and Sb in a Pb target with single laser-shot experiments. Resolution (m/[mu]m) of 1500 and detection limits of approximately 10 pg have been achieved with a single laser pulse. The system configuration and related operating principles for accurately measuring low concentrations of isotopes are described.
Author: E.W. Schlag
Publisher: Newnes
ISBN: 0444596186
Category : Science
Languages : en
Pages : 424
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Book Description
The resurgence of time-of-flight mass spectrometry (TOF-MS) has had its origin in the simplicity of construction and application of such instruments together with the high transmission and the great increase in resolution that has been achieved. The instrument lends itself naturally to a coupling with pulsed laser sources, though this is not a prerequisite. It also affords a time resolution far beyond that traditionally achieved with mass spectrometric rapid scan techniques - a recent example being the real-time analysis of a multi-component mixture from an automobile exhaust. Furthermore, the mass range appears to be extremely large: mass up to 500 kDa and beyond what is being readily measured in the laboratory today. The present set of contributions attempts to give a survey of current applications from many of the active groups in the field. A variety of new applications are considered which are no doubt just the beginning of large new areas of application. By presenting this work in book form it is hoped that it will be of help to the many groups intending to initiate work in this rapidly expanding new area of mass spectrometry.
Author: J. K. Holt
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
A laser ablation/ionization mass spectrometer system is described for the direct chemical analysis of solids. An Nd:YAG laser is used for ablation and ionization of the sample in a quadrupole ion trap operated in an ion-storage (IS) mode that is coupled with a reflectron time-of-flight mass spectrometer (TOF-MS). Single pulse experiments have demonstrated simultaneous detection of up to 14 elements present in glasses in the ppm range. However, detection of the components has produced non-stoichiometric results due to difference in ionization potentials and fractionation effects. Time-of-flight secondary ionization mass spectrometry (TOF-SIMS) was used to spatially map elemental species on the surface and provide further evidence of fractionation effects. Resolution (m/Dm) of 1500 and detection limits of approximately 10 pg have been achieved with a single laser pulse. The system configuration and related operating principles for accurately measuring low concentrations of isotopes are described.
Author: Nathan Michael Hoffman
Publisher:
ISBN:
Category :
Languages : en
Pages : 303
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Book Description
Digital mass spectrometry offers the promise of unlimited mass range and enhanced functionality with existing instrument designs. The theoretical fundamentals of ion handling with digital waveforms have been well-established in the literature. Unfortunately, the lack of practical methods of implementing this theory is corroborated by the lack of publications describing analyses performed using digital mass spectrometry. The work contained herein describes methods of digital ion handling, the digital manipulation of ion stability, methods of controlling digital mass spectrometers, and digital waveform generation using microcontroller-based systems. The trapping of ions produced by laser ablation of aerosol particles is characterized as a function of various ion trap operating parameters. Three methods of low-voltage waveform generation providing a wide range of duty cycle resolution are discussed. The use of microcontrollers and analog-to-digital conversion for data acquisition is also covered in detail. Digital mass spectrometry is poised to expand the mass range of analysis by providing more capable instrumentation at lower cost than is achievable with current sinusoidal waveform technology. This work provides detailed descriptions of the practical methods by which this transition to digital mass spectrometry will be implemented down to the level of microcontroller firmware and hardware schematics.
Author: Steve J. Hill
Publisher: John Wiley & Sons
ISBN: 1405172584
Category : Science
Languages : en
Pages : 448
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Book Description
The first edition of Inductively Coupled Plasma Spectrometry andits Applications was written as a handbook for users who wanted abetter understanding of the theory augmented by a practical insightof how best to approach a range of applications, and to provide auseful starting point for users trying an approach or technique newto them. These objectives have been retained in the second editionbut a slight shift in emphasis gives the volume an overallperspective that is more forward looking. Structured into 11 chapters, the current edition is a thoroughrevision of the original, covering the principles of inductivelycoupled plasmas, instrumentation, methodology and applicationswithin environmental analysis, earth science, food science andclinical medicine. Each chapter, written by internationallyrecognised leaders in their specific subject areas, provides enoughdetail to be useful to both the new and experienced users. Fullaccount is taken of recent developments, such as high resolutioninstruments, novel detection systems and electrospraytechniques. Written for all analytical scientists but particularly thoseinvolved in atomic spectroscopy and in environmental, geochemical,clinical or food analysis, this timely and informative book will bean essential reference in their use of inductively coupled plasmasto achieve their own scientific goals.
Author: Jagdish P. Singh
Publisher: Elsevier
ISBN: 0128188308
Category : Science
Languages : en
Pages : 624
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Book Description
Laser-Induced Breakdown Spectroscopy, Second Edition, covers the basic principles and latest developments in instrumentation and applications of Laser Induced Breakdown Spectroscopy (LIBS). Written by active experts in the field, it serves as a useful resource for analytical chemists and spectroscopists, as well as graduate students and researchers engaged in the fields of combustion, environmental science, and planetary and space exploration. This fully revised second edition includes several new chapters on new LIBS techniques as well as several new applications, including flame and off-gas measurement, pharmaceutical samples, defense applications, carbon sequestration and site monitoring, handheld instruments, and more. LIBS has rapidly developed into a major analytical technology with the capability of detecting all chemical elements in a sample, of real- time response, and of close-contact or stand-off analysis of targets. It does not require any sample preparation, unlike conventional spectroscopic analytical techniques. Samples in the form of solids, liquids, gels, gases, plasmas, and biological materials (like teeth, leaves, or blood) can be studied with almost equal ease. This comprehensive reference introduces the topic to readers in a simple, direct, and accessible manner for easy comprehension and maximum utility. - Covers even more applications of LIBS beyond the first edition, including combustion, soil physics, environment, and life sciences - Includes new chapters on LIBS techniques that have emerged in the last several years, including Femtosecond LIBS and Molecular LIBS - Provides inspiration for future developments in this rapidly growing field in the concluding chapter
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Book Description
Author: Heewon Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 462
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Author: Scott D Tanner
Publisher: Royal Society of Chemistry
ISBN: 1847551696
Category : Science
Languages : en
Pages : 440
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Book Description
The understanding of the principles of ICP-MS and its application as an analytical technique is continually evolving and this book provides a unique snapshot of the current state-of-the-art. Plasma Source Mass Spectrometry: The New Millennium covers a diverse range of topics including the fate of the sample as it passes through the sample introduction system, chemical resolution using reaction and collision cells, various methods of mass analysis, approaches to account for spectral interferences, hyphenation methods to enable speciation, and the results of analyses ranging from natural waters and archaeological isotope ratios to organometallic speciation in biological materials. Describing explicitly the analytical methods that deal with current analytical challenges, and offering a current perspective on elemental analysis by plasma source mass spectrometry that is not to be found elsewhere, this book will be welcomed by both academics and industrialists as containing the most up-to-date information available on this burgeoning topic.
