MALDI for Polymer Analysis:Synthetic Polymers and Additives [MALDI Application]
A high-resolution MALDI/TOF-TOF system with unique ion optics is applied to the identification of polymers and polymer additives. Exact mass measurements and isotopic abundances were used to identify elemental composition. High-energy collision-induced dissociation with monoisotopic precursor selection provided structural information for additives and polymers. The mass accuracy for the sodiated molecule of Irganox 1010 in polymethyl methacrylate (PMMA) was within 1 ppm of the calculated m/z (m/z 1199.733, C73H108O12Na+). The high-energy CID product-ion mass spectrum for sodiated Irganox 1010 shows bond cleavage with little or no rearrangement. Four types of product ions are identified for the high-energy CID product ion mass spectra of sodiated PMMA ions.
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