Download e-book for iPad: Mass spectrometry: instrumentation, interpretation, and by Agnieszka Kraj, Dominic M. Desiderio, Nico M. Nibbering,

By Agnieszka Kraj, Dominic M. Desiderio, Nico M. Nibbering, Rolf Ekman, Jerzy Silberring, Ann M. Westman-Brinkmalm

ISBN-10: 047039580X

ISBN-13: 9780470395806

ISBN-10: 0471713953

ISBN-13: 9780471713951

With contributions from famous specialists from Europe and North the USA, Mass Spectrometry Instrumentation, Interpretation, and functions serves as a discussion board to introduce scholars to the complete international of mass spectrometry and to the numerous various views that every medical box brings to its use. The publication emphasizes using this crucial analytical strategy in lots of diversified fields, together with functions for natural and inorganic chemistry, forensic technology, biotechnology, and lots of different parts. After describing the heritage of mass spectrometry, the e-book strikes directly to speak about instrumentation, idea, and simple functions.

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Extra resources for Mass spectrometry: instrumentation, interpretation, and applications

Sample text

Finally, secondary neutral mass spectrometry (SNMS) deserves mentioning. SNMS was introduced in the early 1970s by Oechsner and Gerhard [125]. In SIMS the ionization is very selective so the signal typically does not reflect the true sample composition. Most ejected species in a sputtering event, however, are neutral. Post-ionization of these with an appropriate technique allows for better quantitative analysis. This can be achieved in different ways, for example, by using an electron beam, plasma, or laser for the ionization.

See Chapter 5 for a more detailed description and Chapters 8 and 16 for additional application examples. 7. Chemical Ionization Chemical ionization (CI) was introduced by Munson and Field in 1966 by allowing a reagent gas into an EI source [36–38]. The pressure is typically $1 torr and the electron beam is more energetic than in EI, typically 500 to 1000 eV. While in EI the analyte is directly ionized by the electron beam, CI is a two-step process, where first reagent gas molecules are ionized by the electron beam and thereafter the reagent gas ions transfer charge to the analyte.

EI is commonly utilized in GC-MS analysis of organic compounds. See Chapter 5 for a more detailed description and Chapters 8 and 16 for additional application examples. 7. Chemical Ionization Chemical ionization (CI) was introduced by Munson and Field in 1966 by allowing a reagent gas into an EI source [36–38]. The pressure is typically $1 torr and the electron beam is more energetic than in EI, typically 500 to 1000 eV. While in EI the analyte is directly ionized by the electron beam, CI is a two-step process, where first reagent gas molecules are ionized by the electron beam and thereafter the reagent gas ions transfer charge to the analyte.

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Mass spectrometry: instrumentation, interpretation, and applications by Agnieszka Kraj, Dominic M. Desiderio, Nico M. Nibbering, Rolf Ekman, Jerzy Silberring, Ann M. Westman-Brinkmalm


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