Author: Raymond E. March
Publisher: CRC Press
ISBN: 1420083716
Category : Science
Languages : en
Pages : 950
Book Description
Reflecting the substantial increase in popularity of quadrupole ion traps and Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers, Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV: Theory and Instrumentation explores the historical origins of the latest advances in this expanding field. It covers new methods for trapping ions, such as the OrbitrapTM, the digital ion trap (DIT), the rectilinear ion trap (RIT), and the toroidal ion trap; the development and application of the quadrupole ion trap (QIT) and the quadrupole linear ion trap (LIT); and the introduction of high-field asymmetric waveform ion mobility spectrometry (FAIMS). After a combined appreciation and historical survey of mass spectrometry and a discussion of how improved capabilities for microfabrication have led to interest in arrays of ion traps, the book examines the theory and practice of the Orbitrap mass analyzer, the rectangular waveform-driven DIT mass spectrometer, FAIMS, and ion traps with circular geometries. It next discusses ion accumulation for increasing sensitivity in FT-ICR spectrometry, a radio frequency-only-mode event for Penning traps in FT MS, and an FT operating mode applied to a 3D-QIT. The text then presents three behavioral aspects of quadrupole rod sets, before illustrating the development of the 3D-QIT in recent years. The final chapters explore photodissociation in ion traps and the chemical and photochemical studies of metal dication complexes in a 3D-QIT. In this volume that spans twenty-one chapters, a stellar panel of leading experts and up-and-coming researchers presents a cohesive, global, and up-to-date view of the practical aspects of using trapped ion devices. A companion to Volume V: Applications of Ion Trapping Devices, the book authoritatively covers the theory involved as well as the instrumentation currently used in this dynamic field.
Practical Aspects of Trapped Ion Mass Spectrometry
Author: Raymond E. March
Publisher: CRC Press
ISBN: 1420083716
Category : Science
Languages : en
Pages : 950
Book Description
Reflecting the substantial increase in popularity of quadrupole ion traps and Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers, Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV: Theory and Instrumentation explores the historical origins of the latest advances in this expanding field. It covers new methods for trapping ions, such as the OrbitrapTM, the digital ion trap (DIT), the rectilinear ion trap (RIT), and the toroidal ion trap; the development and application of the quadrupole ion trap (QIT) and the quadrupole linear ion trap (LIT); and the introduction of high-field asymmetric waveform ion mobility spectrometry (FAIMS). After a combined appreciation and historical survey of mass spectrometry and a discussion of how improved capabilities for microfabrication have led to interest in arrays of ion traps, the book examines the theory and practice of the Orbitrap mass analyzer, the rectangular waveform-driven DIT mass spectrometer, FAIMS, and ion traps with circular geometries. It next discusses ion accumulation for increasing sensitivity in FT-ICR spectrometry, a radio frequency-only-mode event for Penning traps in FT MS, and an FT operating mode applied to a 3D-QIT. The text then presents three behavioral aspects of quadrupole rod sets, before illustrating the development of the 3D-QIT in recent years. The final chapters explore photodissociation in ion traps and the chemical and photochemical studies of metal dication complexes in a 3D-QIT. In this volume that spans twenty-one chapters, a stellar panel of leading experts and up-and-coming researchers presents a cohesive, global, and up-to-date view of the practical aspects of using trapped ion devices. A companion to Volume V: Applications of Ion Trapping Devices, the book authoritatively covers the theory involved as well as the instrumentation currently used in this dynamic field.
Publisher: CRC Press
ISBN: 1420083716
Category : Science
Languages : en
Pages : 950
Book Description
Reflecting the substantial increase in popularity of quadrupole ion traps and Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers, Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV: Theory and Instrumentation explores the historical origins of the latest advances in this expanding field. It covers new methods for trapping ions, such as the OrbitrapTM, the digital ion trap (DIT), the rectilinear ion trap (RIT), and the toroidal ion trap; the development and application of the quadrupole ion trap (QIT) and the quadrupole linear ion trap (LIT); and the introduction of high-field asymmetric waveform ion mobility spectrometry (FAIMS). After a combined appreciation and historical survey of mass spectrometry and a discussion of how improved capabilities for microfabrication have led to interest in arrays of ion traps, the book examines the theory and practice of the Orbitrap mass analyzer, the rectangular waveform-driven DIT mass spectrometer, FAIMS, and ion traps with circular geometries. It next discusses ion accumulation for increasing sensitivity in FT-ICR spectrometry, a radio frequency-only-mode event for Penning traps in FT MS, and an FT operating mode applied to a 3D-QIT. The text then presents three behavioral aspects of quadrupole rod sets, before illustrating the development of the 3D-QIT in recent years. The final chapters explore photodissociation in ion traps and the chemical and photochemical studies of metal dication complexes in a 3D-QIT. In this volume that spans twenty-one chapters, a stellar panel of leading experts and up-and-coming researchers presents a cohesive, global, and up-to-date view of the practical aspects of using trapped ion devices. A companion to Volume V: Applications of Ion Trapping Devices, the book authoritatively covers the theory involved as well as the instrumentation currently used in this dynamic field.
Practical Aspects of Trapped Ion Mass Spectrometry
Author: Raymond E. March
Publisher: CRC Press
ISBN: 9781420083736
Category : Science
Languages : en
Pages : 566
Book Description
Widely used in medical research, pharmaceutical and fine chemicals industries, biological and physical sciences, and security and environmental agencies, mass spectrometry techniques are continually under development. In Practical Aspects of Trapped Ion Mass Spectrometry: Volume V, Applications of Ion Trapping Devices, an international panel of authors presents a world-wide view of the practical aspects of recent progress using trapped ion devices. In contrast to previous texts, which have concentrated generally on a single or limited range of ion trapping techniques, a key feature of this compilation of contributions is its coverage of all the ion trapping techniques currently in use. Spanning sixteen chapters, the text examines: Ion/neutral and ion/ion reactions Structural characterization of proteins and peptides using quadrupole ion trap mass spectrometry, Fourier transform – ion cyclotron resonance (FT-ICR) mass spectrometry, and traveling wave ion mobility mass spectrometry Ion spectroscopy and electron diffraction Conformational analysis of protein isobaric charge states Practical examples of trapped-ion technology that reflect the wide diversity of applications of trapped-ion devices This text is the first detailed account of the application of new and established mass spectrometric techniques utilizing trapped or confined ions for prolonged investigation and increased sensitivity. Each chapter contains complete references and utilizes a consistent format and writing style, with all terms, acronyms, procedures, and equations thoroughly explained. The strong editorial input to the diverse sections enables readers to readily appreciate the commonalities of topics ranging from theory of instrument operation to proteins, flavonoids, atomic clocks, and single ion mass spectrometry.
Publisher: CRC Press
ISBN: 9781420083736
Category : Science
Languages : en
Pages : 566
Book Description
Widely used in medical research, pharmaceutical and fine chemicals industries, biological and physical sciences, and security and environmental agencies, mass spectrometry techniques are continually under development. In Practical Aspects of Trapped Ion Mass Spectrometry: Volume V, Applications of Ion Trapping Devices, an international panel of authors presents a world-wide view of the practical aspects of recent progress using trapped ion devices. In contrast to previous texts, which have concentrated generally on a single or limited range of ion trapping techniques, a key feature of this compilation of contributions is its coverage of all the ion trapping techniques currently in use. Spanning sixteen chapters, the text examines: Ion/neutral and ion/ion reactions Structural characterization of proteins and peptides using quadrupole ion trap mass spectrometry, Fourier transform – ion cyclotron resonance (FT-ICR) mass spectrometry, and traveling wave ion mobility mass spectrometry Ion spectroscopy and electron diffraction Conformational analysis of protein isobaric charge states Practical examples of trapped-ion technology that reflect the wide diversity of applications of trapped-ion devices This text is the first detailed account of the application of new and established mass spectrometric techniques utilizing trapped or confined ions for prolonged investigation and increased sensitivity. Each chapter contains complete references and utilizes a consistent format and writing style, with all terms, acronyms, procedures, and equations thoroughly explained. The strong editorial input to the diverse sections enables readers to readily appreciate the commonalities of topics ranging from theory of instrument operation to proteins, flavonoids, atomic clocks, and single ion mass spectrometry.
Practical Aspects of Trapped Ion Mass Spectrometry, Volume V
Author: Raymond E. March
Publisher: CRC Press
ISBN: 1420083740
Category : Science
Languages : en
Pages : 568
Book Description
Widely used in medical research, pharmaceutical and fine chemicals industries, biological and physical sciences, and security and environmental agencies, mass spectrometry techniques are continually under development. In Practical Aspects of Trapped Ion Mass Spectrometry: Volume V, Applications of Ion Trapping Devices, an international panel of aut
Publisher: CRC Press
ISBN: 1420083740
Category : Science
Languages : en
Pages : 568
Book Description
Widely used in medical research, pharmaceutical and fine chemicals industries, biological and physical sciences, and security and environmental agencies, mass spectrometry techniques are continually under development. In Practical Aspects of Trapped Ion Mass Spectrometry: Volume V, Applications of Ion Trapping Devices, an international panel of aut
Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV
Author: Raymond E. March
Publisher: CRC Press
ISBN: 1420083724
Category : Science
Languages : en
Pages : 952
Book Description
Reflecting the substantial increase in popularity of quadrupole ion traps and Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers, Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV: Theory and Instrumentation explores the historical origins of the latest advances in this expanding field. It covers new methods for trapp
Publisher: CRC Press
ISBN: 1420083724
Category : Science
Languages : en
Pages : 952
Book Description
Reflecting the substantial increase in popularity of quadrupole ion traps and Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers, Practical Aspects of Trapped Ion Mass Spectrometry, Volume IV: Theory and Instrumentation explores the historical origins of the latest advances in this expanding field. It covers new methods for trapp
Quadrupole Ion Trap Mass Spectrometry
Author: Raymond E. March
Publisher: John Wiley & Sons
ISBN: 0471717975
Category : Science
Languages : en
Pages : 389
Book Description
A definitive reference, completely updated Published in 1989, the First Edition of this book, originally entitled Quadrupole Storage Mass Spectrometry, quickly became the definitive reference in analytical laboratories worldwide. Revised to reflect scientific and technological advances and new applications in the field, the Second Edition includes new chapters covering: * New ion trap instruments of high sensitivity * Peptide analysis by liquid chromatography/ion trap tandem mass spectrometry * Analytical aspects of ion trap mass spectrometry combined with gas chromatography * Simulation of ion trajectories in the ion trap One additional chapter discusses the Rosetta mission, a "comet chaser" that was sent on a ten-year journey in 2004 to study the comet Churyumov-Gerasimenko using, among other instruments, a GC/MS system incorporating a specially designed ion trap mass spectrometer. This comprehensive reference also includes discussions of the history of the quadrupole ion trap, the theory of quadrupole mass spectrometry, the dynamics of ion-trapping chemistry in the quadrupole ion trap, the cylindrical ion trap, miniature traps, and linear ion traps. Complete with conclusions and references, this primer effectively encapsulates the body of knowledge on quadrupole ion trap mass spectrometry. With its concise descriptions of the theory of ion motion and the principles of operation, Quadrupole Ion Trap Mass Spectrometry, Second Edition is ideal for new users of quadrupole devices, as well as for scientists, researchers, and graduate and post-doctoral students working in analytical laboratories.
Publisher: John Wiley & Sons
ISBN: 0471717975
Category : Science
Languages : en
Pages : 389
Book Description
A definitive reference, completely updated Published in 1989, the First Edition of this book, originally entitled Quadrupole Storage Mass Spectrometry, quickly became the definitive reference in analytical laboratories worldwide. Revised to reflect scientific and technological advances and new applications in the field, the Second Edition includes new chapters covering: * New ion trap instruments of high sensitivity * Peptide analysis by liquid chromatography/ion trap tandem mass spectrometry * Analytical aspects of ion trap mass spectrometry combined with gas chromatography * Simulation of ion trajectories in the ion trap One additional chapter discusses the Rosetta mission, a "comet chaser" that was sent on a ten-year journey in 2004 to study the comet Churyumov-Gerasimenko using, among other instruments, a GC/MS system incorporating a specially designed ion trap mass spectrometer. This comprehensive reference also includes discussions of the history of the quadrupole ion trap, the theory of quadrupole mass spectrometry, the dynamics of ion-trapping chemistry in the quadrupole ion trap, the cylindrical ion trap, miniature traps, and linear ion traps. Complete with conclusions and references, this primer effectively encapsulates the body of knowledge on quadrupole ion trap mass spectrometry. With its concise descriptions of the theory of ion motion and the principles of operation, Quadrupole Ion Trap Mass Spectrometry, Second Edition is ideal for new users of quadrupole devices, as well as for scientists, researchers, and graduate and post-doctoral students working in analytical laboratories.
Practical Aspects of Ion Trap Mass Spectrometry
Author: Raymond E. March
Publisher: CRC Press
ISBN: 9780849344527
Category : Science
Languages : en
Pages : 452
Book Description
Fundamentals of Ion Trap Mass Spectrometry presents an account of the development and theory of the quadrupole ion trap and its utilization as an ion storage device, a reactor for ion/molecular reactions, and a mass spectrometer. It also expands the appreciation of ion traps from that of a unique arrangement of electrodes of hyperbolic form (and having a pure quadrupole field) to a series of ion traps having fields with hexapole and octopole components and introduces the practical ion trapping device in which electrode spacing has been increased. The fundamentals of ion trap are covered in four chapters, beginning with the origin of the ion trap, its development and operating principles, and improvements in performance. The second part focuses on the environment within the ion trap -- the movement of ions within the trap -- and how this movement is modified by repeated collisions of the ions with buffer gas atoms of helium, and on the collisions of ions with molecules that lead to chemical change. The critical role of collisions in focusing the ion cloud for subsequent operations is emphasized. This important reference presents a coherent picture of the present status of research in the ion trapping field to facilitate the entree of potential ion trappers and provide a backdrop for ion trap research and development in the future.
Publisher: CRC Press
ISBN: 9780849344527
Category : Science
Languages : en
Pages : 452
Book Description
Fundamentals of Ion Trap Mass Spectrometry presents an account of the development and theory of the quadrupole ion trap and its utilization as an ion storage device, a reactor for ion/molecular reactions, and a mass spectrometer. It also expands the appreciation of ion traps from that of a unique arrangement of electrodes of hyperbolic form (and having a pure quadrupole field) to a series of ion traps having fields with hexapole and octopole components and introduces the practical ion trapping device in which electrode spacing has been increased. The fundamentals of ion trap are covered in four chapters, beginning with the origin of the ion trap, its development and operating principles, and improvements in performance. The second part focuses on the environment within the ion trap -- the movement of ions within the trap -- and how this movement is modified by repeated collisions of the ions with buffer gas atoms of helium, and on the collisions of ions with molecules that lead to chemical change. The critical role of collisions in focusing the ion cloud for subsequent operations is emphasized. This important reference presents a coherent picture of the present status of research in the ion trapping field to facilitate the entree of potential ion trappers and provide a backdrop for ion trap research and development in the future.
Practical Aspects of Ion Trap Mass Spectrometry
Author: Raymond E. March
Publisher: CRC Press
ISBN: 9780849382512
Category : Science
Languages : en
Pages : 542
Book Description
By delivering concentrated information in three different volumes, the editors of the Practical Aspects of Ion Trap Mass Spectrometry mini-series present in-depth reviews on mainstream developments in each active and popular area. Contributing authors provide concise reports illustrating successful approaches to difficult analytical problems across the basic scientific disciplines. Volume three, Chemical, Environmental, and Biomedical Applications, presents a coherent picture of research and applications in the ion trapping field. It examines tandem mass spectrometry, the principal mode of ion trap operation, where one stage of mass selectivity follows another in the same region of space. This volume discusses the fundamentals of ion trap theory, design, and operation; practical ion trap technology; applications involving small molecules; and the environmental and biomedical applications.
Publisher: CRC Press
ISBN: 9780849382512
Category : Science
Languages : en
Pages : 542
Book Description
By delivering concentrated information in three different volumes, the editors of the Practical Aspects of Ion Trap Mass Spectrometry mini-series present in-depth reviews on mainstream developments in each active and popular area. Contributing authors provide concise reports illustrating successful approaches to difficult analytical problems across the basic scientific disciplines. Volume three, Chemical, Environmental, and Biomedical Applications, presents a coherent picture of research and applications in the ion trapping field. It examines tandem mass spectrometry, the principal mode of ion trap operation, where one stage of mass selectivity follows another in the same region of space. This volume discusses the fundamentals of ion trap theory, design, and operation; practical ion trap technology; applications involving small molecules; and the environmental and biomedical applications.
Practical Aspects of Ion Trap Mass Spectrometry, Volume II
Author: Raymond E. March
Publisher: CRC Press
ISBN: 1040287530
Category : Science
Languages : en
Pages : 342
Book Description
By delivering concentrated information in three different volumes, the editors of the Practical Aspects of Ion Trap Mass Spectrometry mini-series present in-depth reviews on mainstream developments in each active and popular area. Contributing authors provide concise reports illustrating successful approaches to difficult analytical problems across the basic scientific disciplines. Ion Trap Instrumentation, the second volume in the series, conveys an appreciation of the ion trap as a versatile instrument which is used successfully in research and in applications, often in tandem with other instruments or components, such as external ion sources and lasers. The book begins with a discussion of high resolution mass spectrometry and mass measurement accuracy. It then demonstrates that trajectories of high kinetic energy ions can be controlled so that such ions are confined. It provides applications of lasers to the study of trapped ions the laser photodissociation of gaseous ions confined within the ion trap. The book concludes with physics applications of the ion trap, in particular, the Penning trap and the Paul trap.
Publisher: CRC Press
ISBN: 1040287530
Category : Science
Languages : en
Pages : 342
Book Description
By delivering concentrated information in three different volumes, the editors of the Practical Aspects of Ion Trap Mass Spectrometry mini-series present in-depth reviews on mainstream developments in each active and popular area. Contributing authors provide concise reports illustrating successful approaches to difficult analytical problems across the basic scientific disciplines. Ion Trap Instrumentation, the second volume in the series, conveys an appreciation of the ion trap as a versatile instrument which is used successfully in research and in applications, often in tandem with other instruments or components, such as external ion sources and lasers. The book begins with a discussion of high resolution mass spectrometry and mass measurement accuracy. It then demonstrates that trajectories of high kinetic energy ions can be controlled so that such ions are confined. It provides applications of lasers to the study of trapped ions the laser photodissociation of gaseous ions confined within the ion trap. The book concludes with physics applications of the ion trap, in particular, the Penning trap and the Paul trap.
Electrospray and MALDI Mass Spectrometry
Author: Richard B. Cole
Publisher: John Wiley & Sons
ISBN: 1118211553
Category : Science
Languages : en
Pages : 900
Book Description
Discover how advances in mass spectrometry are fueling new discoveries across a broad range of research areas Electrospray and MALDI Mass Spectrometry brings both veteran practitioners and beginning scientists up to date with the most recent trends and findings in electrospray ionization and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. In particular, this Second Edition highlights how advances in electrospray and MALDI mass spectrometry are supporting important discoveries in new and emerging fields such as proteomics and metabolomics as well as in traditional areas of chemistry and physics research. Electrospray AND MALDI Mass Spectrometry, SECOND EDITION is divided into five parts: Part A, Fundamentals of ES, explains the fundamental phenomena underlying the electrospray process, including selectivity in ionization and inherent electrochemistry, and concludes with a chapter offering a comparative inventory of source hardware Part B, Fundamentals of MALDI, confronts ionization mechanisms, instrument development, and matrix selection, and includes a final chapter that explores the special application of MALDI to obtain two-dimensional images of spatial distributions of compounds on surfaces Part C, ES and MALDI Coupling to Mass Spectrometry Instrumentation, examines the coupling of these ionization techniques to various mass analyzers, including quadrupole ion trap, time-of-flight, Fourier transform ion cyclotron resonance, and ion mobility mass spectrometers Part D, Practical Aspects of ES and MALDI, investigates analytical issues including quantification, charge-state distributions, noncovalent interactions in solution that are preserved as gas-phase ions, and various means of ion excitation in preparation for tandem mass spectrometry, and offers a guide to the interpretation of even-electron mass spectra Part E, Biological Applications of ES and MALDI, examines the role of mass spectrometry in such areas as peptide and protein characterization, carbohydrate analysis, lipid analysis, and drug discovery Written by a team of leading experts, the book not only provides a critical review of the literature, but also presents key concepts in tutorial fashion to help readers take full advantage of the latest technological breakthroughs and applications. As a result, Electrospray and MALDI Mass Spectrometry will help researchers fully leverage the power of electrospray and MALDI mass spectrometry. The judicious compartmentalization of chapters, and the pedagogic presentation style throughout, render the book highly suitable for use as a text for graduate-level courses in advanced mass spectrometry.
Publisher: John Wiley & Sons
ISBN: 1118211553
Category : Science
Languages : en
Pages : 900
Book Description
Discover how advances in mass spectrometry are fueling new discoveries across a broad range of research areas Electrospray and MALDI Mass Spectrometry brings both veteran practitioners and beginning scientists up to date with the most recent trends and findings in electrospray ionization and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. In particular, this Second Edition highlights how advances in electrospray and MALDI mass spectrometry are supporting important discoveries in new and emerging fields such as proteomics and metabolomics as well as in traditional areas of chemistry and physics research. Electrospray AND MALDI Mass Spectrometry, SECOND EDITION is divided into five parts: Part A, Fundamentals of ES, explains the fundamental phenomena underlying the electrospray process, including selectivity in ionization and inherent electrochemistry, and concludes with a chapter offering a comparative inventory of source hardware Part B, Fundamentals of MALDI, confronts ionization mechanisms, instrument development, and matrix selection, and includes a final chapter that explores the special application of MALDI to obtain two-dimensional images of spatial distributions of compounds on surfaces Part C, ES and MALDI Coupling to Mass Spectrometry Instrumentation, examines the coupling of these ionization techniques to various mass analyzers, including quadrupole ion trap, time-of-flight, Fourier transform ion cyclotron resonance, and ion mobility mass spectrometers Part D, Practical Aspects of ES and MALDI, investigates analytical issues including quantification, charge-state distributions, noncovalent interactions in solution that are preserved as gas-phase ions, and various means of ion excitation in preparation for tandem mass spectrometry, and offers a guide to the interpretation of even-electron mass spectra Part E, Biological Applications of ES and MALDI, examines the role of mass spectrometry in such areas as peptide and protein characterization, carbohydrate analysis, lipid analysis, and drug discovery Written by a team of leading experts, the book not only provides a critical review of the literature, but also presents key concepts in tutorial fashion to help readers take full advantage of the latest technological breakthroughs and applications. As a result, Electrospray and MALDI Mass Spectrometry will help researchers fully leverage the power of electrospray and MALDI mass spectrometry. The judicious compartmentalization of chapters, and the pedagogic presentation style throughout, render the book highly suitable for use as a text for graduate-level courses in advanced mass spectrometry.
Current Practice of Gas Chromatography-Mass Spectrometry
Author: Wilfried M.A. Niessen
Publisher: CRC Press
ISBN: 9781420029512
Category : Science
Languages : en
Pages : 530
Book Description
This volume details the principles and instrumentation of gas chromatography-mass spectrometry (CG-MS), and outlines industrial, environmental, pharmaceutical, clinical, toxicological, forensic and food-related applications, revealing findings from the laboratories of 40 contributing scientists around the world using GC-MS in practice. It describes upstream and downstream applications of GC-MS in the petroleum industry and identifies chlorinated compounds in the environment with quadrupole ion-trap technology and high-resolution sector instruments.
Publisher: CRC Press
ISBN: 9781420029512
Category : Science
Languages : en
Pages : 530
Book Description
This volume details the principles and instrumentation of gas chromatography-mass spectrometry (CG-MS), and outlines industrial, environmental, pharmaceutical, clinical, toxicological, forensic and food-related applications, revealing findings from the laboratories of 40 contributing scientists around the world using GC-MS in practice. It describes upstream and downstream applications of GC-MS in the petroleum industry and identifies chlorinated compounds in the environment with quadrupole ion-trap technology and high-resolution sector instruments.