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.
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