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Eur. J. Mass Spectrom. 4, 429 - 433 (1998) |
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Probing polystyrene cationization in matrix-assisted laser/desorption ionization | ||
H. Rashidezadeh, K. Hung and Baochuan Guo* |
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ABSTRACT: | ||
It has been observed that the use of the salts of transition metals other than silver, copper or palladium as the cationizing agent, often fails to cationize polystyrenes in matrix-assisted laser/desorption ionization (MALDI). This work shows that the ability of MALDI to reduce metals to the oxidation state +1 is critically important to polystyrene cationization. Without this reduction, MALDI tends to fail to form polystyrene-metal cations. In addition, this work demonstrates the importance of the use of a good combination of metal salts and matrix in polystyrene cationization. Finally, the implications of this work in the MALDI time-of-flight analysis of polystyrenes are discussed. | ||
Keywords: MALDI, TOF, polystyrenes, cationization, mass spectrometry, cationizing agents and ionization mechanism |
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