Abstract
Matrix-assisted laser desorption ionization and electrospray ionization mass spectrometry (MALDI-MS and ESI-MS) were used for the characterization of epoxidized soybean and linseed oils, which are important raw materials in the biopolymer production. The recently invented data mining approach, mass-remainder analysis (MARA), was implemented for the analysis of these types of complex natural systems. Different epoxidized triglyceride mass spectral peak series were identified, and the number of carbon atoms and epoxide groups was determined. The fragmentation mechanisms of the epoxidized triglyceride (ETG) adducts formed with different cations (such as H+, Na+, Li+, and NH4+) were explored. As a novel approach, the evaluation of the clear fragmentation pathways of the sodiated ETG adducts enabled the estimation of the epoxidized fatty acid compositions of these types of oils by MS/MS.
Highlights
There has been an increased demand for the preparation of polymeric materials based on renewable sources driven by environmental concerns and the depletion of fossil resources.Vegetable oils, such as soybean, sunflower and linseed oils, are one of the most important sources of biopolymers [1,2,3,4,5,6,7]
The blue labels above the peaks indicate the number of carbon atoms and epoxide groups
The number of carbon atoms and epoxide groups of this ion reveal that the chemical formula of this epoxidized triglyceride (ETG) was C3 H8 [CO2 (CH2 )15 (CHOCH)1 ]2 [CO2 (CH2 )15 ]
Summary
There has been an increased demand for the preparation of polymeric materials based on renewable sources driven by environmental concerns and the depletion of fossil resources. Vegetable oils, such as soybean, sunflower and linseed oils, are one of the most important sources of biopolymers [1,2,3,4,5,6,7]. Their main constituents are triglycerides, i.e., triesters of glycerol with saturated and unsaturated fatty acids (FAs). Double bonds in the unsaturated fatty acids of the triglycerides can be converted to the more reactive epoxide functional groups to facilitate the polymerization process [10,11,12,13]
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