MALDI-TOF Mass Spectrometry of Synthetic Polymers by Harald Pasch, Wolfgang Schrepp

By Harald Pasch, Wolfgang Schrepp

MALDI-TOF mass spectrometry is among the most up-to-date and so much interesting new advancements within the research of natural compounds. initially constructed for the research of biomolecules, it has built into probably the most strong suggestions for the characterization of artificial polymers. This ebook describes the basics of the MALDI method and the technical beneficial properties of MALDI-TOF instrumentation. It stories the appliance of MALDI-TOF for id, chemical and molar mass research of artificial polymers. With many examples, the monograph examines experimental protocols for the selection of endgroups, the research of copolymers and ingredients, and the coupling of liquid chromatography and MALDI-TOF in aspect.

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Sample text

The term "metastable" characterizes those ions that have just sufficient energy to leave the ion source and fragment before arriving at the detector. 18) where m2 is always smaller than ml and the charge has to be conserved. If the fragmentation occurs in the ion source both species are subject to the same acceleration voltage and will be detected as "normal" ion peaks, i. 18). If M+ and A+ are correlated, one way in achieving the necessary information is to use special scanning techniques in sector field instruments [1,35].

Hanser Verlag, Miinchen 4. MORI S, BARTH HG (1999) Size exclusion chromatography. Springer, Berlin Heidelberg New York 5. PASCH H (1997) Adv Polym Sci 128:1 6. HUGLIN MB (ed) (1972) Light scattering from polymer solutions. Academic Press, New York 7. LECHNER MD, GEHRKE K, NORDMEIER EH (1993) Makromolekulare Chemie. Birkhauser, Basel 8. ZIMM BH (1948) J Chern Phys 16:1099 9. HIEMENZ PC (1986) Principles of colloid and surface chemistry. Marcel Dekker, New York 10. SVEDBERG T, FAHRENS R (1926) J Am Chern Soc 48:430 11.

A comparison of different ionization methods for technical polymers can be found in [36]. An overview on the role of MS in the analysis of polymers is given in [37] and in the book of Lattimer and Montaudo [38]. As has already been pointed out the main obstacle in the case of polymers is the necessity to bring the molecules to the gas phase. Most of the experiments have been performed by using field or laser desorption, pyrolysis, ion bombardment, or spray techniques for this purpose so we will concentrate on these examples.

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