Formation of [M-H]- and [M-2H]2- ions in the electrospray ionization mass spectra of dicarboxylated polyethylene glycols.
The negative-ion electrospray mass spectrometric behavior of dicarboxylated polyethylene glycols (CPEGCs) is discussed. Both [M-H](-) and [M-2H](2-) ions were observed. It was found that the ratio [M-2H](2-)/[M-H](-) is affected by oxyethylene chain length, solvent polarity, analyte concentration and applied cone voltage.
Frańska
Magdalena
M
Poznañ University of Technology, Institute of Chemistry, Piotrowo 3, 60-965 Poznań, Poland. franski@main.amu.edu.pl
Zgoła
Agnieszka
A
Rychłowska
Joanna
J
Szymański
Andrzej
A
ŁUkaszewski
Zenon
Z
Frański
Rafał
R
D003998:Dicarboxylic Acids / Q000032:analysis* / Q000737:chemistry; D011092:Polyethylene Glycols / Q000032:analysis* / Q000737:chemistry; D011522:Protons; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
D003998:Dicarboxylic Acids; D011522:Protons; D011092:Polyethylene Glycols