Download or read book Continuous Flow Fast Atom Bombardment Mass Spectrometry written by R. M. Caprioli and published by . This book was released on 1990-12-31 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on presentations made at a workshop on Continuous Flow Fast Atom Bombardment held in Annapolis, Maryland, in November, 1989. Expanded and edited, the papers presented at the workshop form a compact volume reflecting recent advances in a number of key areas in the field of continuous flow fast atom bombardment mass spectrometry. Topics cover non-aqueous applications, biological process monitoring, trace analysis, and design and operational conditions.

Download or read book Continuous Flow Fast Atom Bombardment and Electrospray Ionization Mass Spectrometry in Natural Products Research written by Katarzyna Janota and published by . This book was released on 1995 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous flow fast atom bombardment (CF-FAB) has been applied as a liquid chromatography/mass spectrometry (LC/MS) and liquid chromatography/mass spectrometry/mass spectrometry (LC/MS/MS) interface in natural products research. Initial studies concentrated on characterization of the interface, optimization of operational parameters and sensitivity assessment. Using a CF-FAB interface, femtomole quantities of different classes of compounds were detected, which is two orders of magnitude more sensitive than by standard FAB. Later, CF-FAB was applied to the analysis of didemnin, streptovaricin, and ecteinascidin mixtures in isocratic and/or gradient modes. The first application led to the discovery of acyclo-desHIP-didemnin A in a mixture of didemnins, cyclic peptides of potent antitumor and antiviral activity. Although related to didemnins, the linear peptide was biologically inactive. The second application project involved streptovaricins, secondary metabolites of Streptomyces spectabilis. In the streptovaricin mixture, besides streptovaricins, protostreptovaricins III and IV were detected by LC/CF-FABMS. The presence of protostreptovaricins in the streptovaricin complex confirmed the biosynthetic pathway proposed for streptovaricin C. Even though these precursors were known previously, they were not observed as components of the mixture by standard FABMS. When ecteinascidins were analyzed by LC/CF-FABMS, the most significant difference was the amount of structural information generated in the low mass range in comparison to the standard FAB spectra. The hydrates of structurally significant fragment ions were observed when the background was subtracted. The use of a CF-FAB interface was extended to on-line high resolution mass measurements of different components in the mixture. Mass measurements were within the range of acceptable error. On-line LC/CF-FABMS/MS was performed on the ecteinascidin mixture using B/E linked scans. Observed ions were then classified as group-characteristic or compound-specific. Finally, CF-FAB was compared to electrospray ionization (ESI) as an LC/MS and LC/MS/MS interface with respect to sensitivity and structural information. In the selected ion chromatogram mode, the sensitivity of CF-FAB is comparable to that of LC/ESIMS. However, identification of unknowns is more feasible by LC/ESIMS than by LC/CF-FABMS. Also, the daughter ion mass spectra can be produced even on trace amounts by LC/ESIMS/MS and are of better quality than by LC/CF-FABMS/MS. In LC/ESIMS/MS, similar structural information is obtained; however, the main difference is the relative intensities of the fragment ions. Several new ecteinascidins were observed by LC/ESIMS. Their structures are proposed on the basis of LC/ESIMS/MS data.

Download or read book Continuous flow Fast Atom Bombardment Liquid Chromatography mass Spectrometry in Bioanalysis written by Paula S. Kokkonen and published by . This book was released on 1991 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ionization Methods in Organic Mass Spectrometry written by Alison E Ashcroft and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionization Methods in Organic Mass Spectrometry is a basic practical guide for scientists of all disciplines who wish to analyse samples by organic mass spectrometry. Concentrating on instrumental operation, this book gives step-by-step instructions on how to set up, and how to achieve the best results, using a range of ionization methods, including atmospheric pressure chemical ionization, electrospray ionization and matrix assisted laser desorption ionization. Ionization Methods in Organic Mass Spectrometry will enable a beginner, or practitioner with limited experience, to choose the most appropriate ionization technique in application areas such as biomolecules, drugs and metabolites, pesticides, polymers and many other organic compounds. It will be a valuable practical guide for technicians, graduates, students or researchers - or indeed anyone new to practical organic mass spectrometry.

Download or read book Mass Spectrometry of Peptides written by Dominic M. Desiderio and published by CRC Press. This book was released on 1990-11-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to collect into one volume the research done on the mass spectrometry of peptides. It balances a range of topics including theory, instrumentation, analytical techniques, and biological applications. The scope of the work contains three major sections: ionization methods, instrumental developments, and analysis of peptides. It describes 252Cf plasma desorption and laser-induced multiphoton ionization methodology. This exciting resource covers many new areas, including continuous flow FAB, quantification of human neuropeptides, and peptide mapping. It also discusses Q-FTMS, cross-links, and metal ions.

Download or read book Electrochemically Assisted Fast Atom Bombardment Mass Spectrometry written by Lawrence Richard Phillips and published by . This book was released on 1988 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mass Spectrometry in Biomolecular Sciences written by Richard M. Caprioli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mass Spectrometry in the Biological Sciences covers the most recent technological and applied developments in the area, including both ionization techniques and ion analysis. It introduces and reviews some of the newer ionization methods, describes the major instrumentation involved in mass analysis, and presents the scope of the technology in biology, medicine, and environmental science. Specific examples are given for a number of topics. It also deals with recent achievements in the on-line combination of separation techniques such as gas chromatography, liquid chromatography, and supercritical fluid technology.

Download or read book Mass Spectrometry written by Dominic M. Desiderio and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current volume reviews novel instrumentation and techniques as applied to the analysis of diacylglycerylphospholipids, modifications to DNA, and the characterization of variant hemoglobins. It reflects the flexible, broad-based approaches mass spectroscopists apply to clinical and biomedical challenges.

Download or read book Liquid Chromatography Mass Spectrometry written by Alfred L. Yergey and published by Springer Science & Business Media. This book was released on 2013-12-14 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended both to be an introduction to techniques and applications of liquid chromatography/mass spectrometry and to serve as a reference for future workers. When we undertook its writing, we chose not to cover the field, particularly applications, exhaustively. Rather we wished to produce a book that would be of use to people just beginning to use the technique as well as to more advanced practitioners. In this regard, we have sought to highlight techniques and applications that are of current importance, while not neglecting descriptions of approaches that may be of significance in the future. We hope that we have succeeded in this. At the same time we hope that the bibliography, with indexes classified by author and title, will make this book of value to those who may disagree with our emphasis. ACKNOWLEDGMENTS. One of us (C. G. E. ) wishes to acknowledge the en couragment of Professor J. A. McCloskey in undertaking this project. All four of us are grateful for the continuous and expert assistance of V. A. Edmonds in the preparation of the Bibliography. Alfred L. Y ergey Bethesda, Maryland Charles G. Edmonds Richland, Washington lvor A. S. Lewis London, England Marvin L. Vestal Houston, Texas v Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . 2. Direct Liquid Introduction Interfaces . . . . . . . . . . 5 . . . 2. 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 2. Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. 3. Specific DLI Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 3. 1. Capillary Inlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 3. 2. Diaphragm Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2. 3. 3. Nebulizing Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Download or read book The Development of a Continuous Flow Maldi Interface with an Ion Trap reflectron TOF Mass Spectrometer for the On line LC MS Detection of Peptides and Proteins written by Li Liang and published by . This book was released on 1995 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Pharmaceutical Analysis by HPLC written by Satinder Ahuja and published by Elsevier. This book was released on 2005-02-09 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: High pressure liquid chromatography–frequently called high performance liquid chromatography (HPLC or, LC) is the premier analytical technique in pharmaceutical analysis and is predominantly used in the pharmaceutical industry. Written by selected experts in their respective fields, the Handbook of Pharmaceutical Analysis by HPLC Volume 6, provides a complete yet concise reference guide for utilizing the versatility of HPLC in drug development and quality control. Highlighting novel approaches in HPLC and the latest developments in hyphenated techniques, the book captures the essence of major pharmaceutical applications (assays, stability testing, impurity testing, dissolution testing, cleaning validation, high-throughput screening). A complete reference guide to HPLC Describes best practices in HPLC and offers 'tricks of the trade' in HPLC operation and method development Reviews key HPLC pharmaceutical applications and highlights currents trends in HPLC ancillary techniques, sample preparations, and data handling

Download or read book Liquid Chromatography written by Wilfried M.A. Niessen and published by CRC Press. This book was released on 1998-09-01 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprehensively relates developments, principles, and applications of combined liquid chromatography-mass spectrometry and other techniques such as capillary electrophoresis and supercritical fluid chromatography combined with mass spectrometry. It covers historical developments, currently important interfaces and technologies, and LC-MS applications in environmental analysis, pharmaceuticals and bioanalysis, and additional fields. It offers in-depth coverage of interfaces and technologies currently important in the laboratory, especially electrospray and APCI, contains an expanded applications section, and provides over 2200 references, tables, equations, and drawings.

Download or read book Mass Spectrometry written by Jürgen H Gross and published by Springer. This book was released on 2011-01-19 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a balanced mixture of practice-oriented information and theoretical background as well as numerous references, clear illustrations, and useful data tables. Problems and solutions are accessible via a special website. This new edition has been completely revised and extended; it now includes three new chapters on tandem mass spectrometry, interfaces for sampling at atmospheric pressure, and inorganic mass spectrometry.

Download or read book Mass Spectrometry in the Biological Sciences A Tutorial written by M.L Gross and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: The developments in mass spectrometry over the past fifteen years have been impressive in their implications in bioanalytical chemistry. The achievements begin with the inventions of Cf-252 Plasma Desorption Mass Spectrometry by Macfarlane and Fourier Transform Mass Spectrometry by Comisarow and Marshall in the mid 1970s. The former showed the feasibility of producing large gas-phase ions from large biomolecules whereas the latter enhanced the capabilities for ion trapping especially in analytical mass spectrometry. A major achievement was the development by Barber of Fast Atom Bombardment (FAB) mass spectrometry, an advance that heralded a new era in biological mass spectrometry. Contemporary and routine instruments such as magnetic sectors and quadrupoles were rapidly adapted to F AB, and nearly the entire universe of small molecules became amenable to study by mass spectrometry. The introduction of FAB also paved the way for improvement of instrument capability. For example, the upper mass limit of magnet sector mass spectrometers was increased by nearly an order of magnitude by the instrument manufacturers. Furthermore, the technique of tandem mass spectrometry (MS/MS) was given new meaning because important structural information for biomolecules could now be produced for ions introduced by FAB into the tandem instrument. The evolution of MS/MS continues today with the development of ion traps, time-of-flight, and sector instruments equipped with array detection.

Download or read book Mass Spectrometry in Medicinal Chemistry written by Klaus Wanner and published by John Wiley & Sons. This book was released on 2007-06-27 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first overview of mass spectrometry-based pharmaceutical analysis is the key to improved high-throughput drug screening, rational drug design and analysis of multiple ligand-target interactions. The ready reference opens with a general introduction to the use of mass spectrometry in pharmaceutical screening, followed by a detailed description of recently developed analytical systems for use in the pharmaceutical laboratory. Applications range from simple binding assays to complex screens of biological activity and systems containing multiple targets or ligands -- all highly relevant techniques in the early stages in drug discovery, from target characterization to hit and lead finding.

Download or read book Advances in Fast Atom Bombardment Mass Spectrometry written by Mark Elliott Hemling and published by . This book was released on 1986 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Protein Sequencing and Identification Using Tandem Mass Spectrometry written by Michael Kinter and published by John Wiley & Sons. This book was released on 2005-04-12 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: How to design, execute, and interpret experiments for protein sequencing using mass spectrometry The rapid expansion of searchable protein and DNA databases in recent years has triggered an explosive growth in the application of mass spectrometry to protein sequencing. This timely and authoritative book provides professionals and scientists in biotechnology research with complete coverage of procedures for analyzing protein sequences by mass spectrometry, including step-by-step guidelines for sample preparation, analysis, and data interpretation. Michael Kinter and Nicholas Sherman present their own high-quality, laboratory-tested protocols for the analysis of a wide variety of samples, demonstrating how to carry out specific experiments and obtain fast, reliable results with a 99% success rate. Readers will get sufficient experimental detail to apply in their own laboratories, learn about the proper selection and operation of instruments, and gain essential insight into the fundamental principles of mass spectrometry and protein sequencing. Coverage includes: * Peptide fragmentation and interpretation of product ion spectra * Basic polyacrylamide gel electrophoresis * Preparation of protein digests for sequencing experiments * Mass spectrometric analysis using capillary liquid chromatography * Techniques for protein identification by database searches * Characterization of modified peptides using tandem mass spectrometry And much more