The chemical ionization (CI) mass spectra of propylated linear alcohol polyethoxy carboxylates (LAEC) and polyethylene glycol dicarboxylates (PEGDC) have been determined. Olefin displacement of the alkyl chain from the [M + H]+ ions of propylated LAEC formed the protonated polyethoxy carboxyl propyl ester, which then underwent a characteristic fragmentation by first losing water and then ethylene oxides. The fragmentation pattern for PEGDC [M + H]+ ions was similar to that of LAEC, except that the initial steps were displacement of one terminal propyl formate (HCOOC3H7) followed by a neutral loss of CH2O. Strong peaks due to protonated molecules were observed in both LAEC and PEGDC. Product‐ion mass spectra obtained from chemical ionization gas chromatographic/triple‐stage quadrupole mass spectrometric studies supported the proposed fragmentation mechanisms.
|頁（從 - 到）||1016-1020|
|期刊||Rapid Communications in Mass Spectrometry|
|出版狀態||已出版 - 12月 1994|