Formation of [M[BOND]H] and [M[BOND]2H]2− ions in the electrospray ionization mass spectra of dicarboxylated polyethylene glycols

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Abstract

The negative-ion electrospray mass spectrometric behavior of dicarboxylated polyethylene glycols (CPEGCs) is discussed. Both [M[BOND]H] and [M[BOND]2H]2− ions were observed. It was found that the ratio [M[BOND]2H]2−/[M[BOND]H] is affected by oxyethylene chain length, solvent polarity, analyte concentration and applied cone voltage. Copyright © 2004 John Wiley & Sons, Ltd.

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