This multi-disciplined text covers the fundamentals as well as recent advance in this topic, providing need-to-know information for researchers in many disciplines including pharmaceutical, environmental and biomedical analysis who are utilizing mass spectrometry
J. Throck Watson is professor of chemistry and biochemistry at Michigan State University. He received his B.S. in 1961from Iowa State University and his PhD in 1965 from MIT. From 1965 - 68 he was a postdoctoral Researcher at the University of Strasbourg from which he transferred in 1969 to the University of Vanderbilt's Department of Pharmacology. In 1980 he was appointed Professor of Biochemistry and Chemistry at Michigan State University as well as Director of the J.T. Watson Mass Spectrometry Facility. In 1990 he was awarded the Pittsburgh Spectroscopy Society Award. He has published over 150 scientific papers, 15 book chapters and 4 books. He currently serves on the editorial board of Mass Spectrometry Reviews and Current Analytical Chemistry. He retired from MSU in August 2006 to complete the writing of this book. O. David Sparkman is currently an Adjunct Professor of Chemistry at the University of the Pacific in Stockton, California; a Consultant to the National Institute of Standards and Technology Mass Spectrometry Data Center. He teaches courses in mass spectrometry and analytical chemistry and manages the mass spectrometry facility. Over the past 30 years, he has developed and taught five different ACS courses in mass spectrometry; he holds positions on the Editorial Advisory Boards of the European Journal of Mass Spectrometry. He is the author of Mass Spectrometry Desk Reference. He has developed and taught 10 sessions of an interactive Web Course on Mass Spectral Interpretation over the past 4 years. David Sparkman has been a member of ASMS since 1977 and the ACS since 1967. He is a former member of the ACS Continuing Education Committee. He was the invited teacher of the Mass Spectral Interpretation course held at the 17th International Mass Spectrometry Conference held in Prague, the Czech Republic, in August of 2006. Permissions Request permission to reuse content from this site
"An easy-to-read guide to the concept of mass spectrometry, and demonstrates its potential and limitations.... This comprehensive reference provides systematic descriptions of the various types of mass analyzers and ionization, along with corresponding strategies for interpretation of data." (MP Materials Testing, February 2009)
Mass spectrometry is a versatile analytical technique used to determine fundamental properties of both organic and inorganic materials. The technique can be used to establish elemental or molecular composition, the structure of molecules, and isotopic ratios of specific elements. The information desired determines sample preparation procedures prior to analysis, the method of sample introduction into the mass spectrometer, the manner in which it is converted into ions, and how ion masses are analyzed. Detailed descriptions of mass spectrometry can be found in Barker (1999), Becker (2007), Beynon (1960), Ebsworth et al. (1987), and Watson and Sparkman (2007). More general outlines are available in books on analytical techniques, such as Hammes (2005), Khandpur (2007), Patnaik (2004), Pasto and Johnson (1979), and Skoog et al. (1998). Basic theoretical principles of mass spectrometry are described in general chemistry and physics texts, such as Halliday et al. (2005) and Mortimer (1986). General descriptions and examples of archaeological applications of mass spectrometry combined with chromatographic (Evershed 1992a, 1993b, 1994, 2000; Hites 1997) and inductively coupled plasma (Young and Pollard 2000) techniques are also available.
Direct analysis in real time (DART) mass spectrometry is a recently developed innovative technology, which has shown broad applications for fast and convenient analysis of complex samples. Due to the ease of sample preparation, we have recently initiated an investigation of the feasibility of detecting nucleotides and nucleosides using the DART-AccuTOF instrument, which we will refer to as the DART mass spectrometer. Our experimental results reveal that the ions representing the intact molecules of nucleotides are not detectable in either positive-ion or negative-ion mode. Instead, all four natural nucleotides fragment in the DART ion source, and a common fragment ion, [C5H5O]+ (1), is observed, which is probably formed via multiple-elimination reactions. Interestingly, 1 can form adducts with nucleobases in different molar ratios in the DART ion source. In contrast to nucleotides, the ions representing the intact molecules of nucleosides are detected in both positive-ion and negative-ion mode using DART mass spectrometry. Surprisingly, the fragmentation pattern of nucleosides is different from that of nucleotides in the DART ion source. In the cases of nucleosides (under positive-ion conditions), the production of 1 is not observed, indicating that the phosphate group plays an important role for the multiple eliminations observed in the spectra of nucleotides. The in-source reactions described in the present work show the complexity of the conditions in the DART ion source, and we hope that our results illustrate a better understanding about DART mass spectrometry.
This chapter from Mass Spectrometry - A Textbook by Jürgen H. Gross gives a short and comprehensive overview about chemical ionization for mass spectrometry. Gas phase chemistry topics are discussed and several examples and illustration round up this chapter.
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