Carbon dioxide MALDI

Furthermore, size-exclusion chromatography (SEC) analyses generally reveal a bimodal distribution of molecular weights of the copolymers. Concomitantly, MALDI-ToF mass spectral measurements exhibit two sets of peaks corresponding to copolymer end groups of -OH and -X. For example, utilizing a (salen)CrCl/bis (triphenylphosphme)iminium chloride ([PPNjCl) catalyst for the copolymerization of cyclohexene oxide and carbon dioxide, the two copolymers illustrated in Fig. 6 were observed [26]. 

A. OvCTbrag, M. Karas, et al., MALDI of large biomolecules with a TEA-carbon dioxide-lasCT, Rapid Commun, Mass Spectrom, 5, 128-131 (1991). 

Gases Low relative molecular mass (100-600) Polar materials (200-2000) Drugs and metabolites Peptides, proteins Carbon dioxide, anesthetics Steroids, fatty acids Sugars, nucleosides, small peptides Glucuronides, sulfates Endorphins, albumin, proteomics Gas analyzer Isotope ratio MS GC-MS, LC-MS LC-MS, FAB-MS LC-MS/MS, FAB-MS/MS Digest followed by LC-ESI-MS/MS, nanoflow-MS/MS, MALDI-ToF-MS... 

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