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Chemical ionization mass spectra of linear alcohol polyethoxy carboxylates and polyethylene glycol dicarboxylates
Author(s) -
Ding WangHsien,
Fujita Yoshiko,
Reinhard Martin
Publication year - 1994
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290081222
Subject(s) - chemistry , mass spectrum , chemical ionization , fragmentation (computing) , protonation , molecule , mass spectrometry , ion , ionization , alcohol , formate , alkyl , analytical chemistry (journal) , organic chemistry , chromatography , computer science , catalysis , operating system
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 (HCOOC 3 H 7 ) followed by a neutral loss of CH 2 O. 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.