title: Formation of [M-H]- and [M-2H]2- ions in the electrospray ionization mass spectra of dicarboxylated polyethylene glycols.
abstract: 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.
authors.affiliation: Poznañ University of Technology, Institute of Chemistry, Piotrowo 3, 60-965 Poznań, Poland. franski@main.amu.edu.pl
authors.forename: Magdalena
authors.initials: M
authors.lastname: Frańska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Zgoła
authors.forename: Joanna
authors.initials: J
authors.lastname: Rychłowska
authors.forename: Andrzej
authors.initials: A
authors.lastname: Szymański
authors.forename: Zenon
authors.initials: Z
authors.lastname: ŁUkaszewski
authors.forename: Rafał
authors.initials: R
authors.lastname: Frański
mesh_terms: 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*
chemical_list: D003998:Dicarboxylic Acids; D011522:Protons; D011092:Polyethylene Glycols