Composition Characterization of Fatty Acid Zinc Salts by Chromatographic and NMR Spectroscopic Analyses on Their Fatty Acid Methyl Esters

Figure 4

Results of Py-GC-MS analysis directly on methyl-esterified products (FAMEs) showing the free C16 : 0 and C18 : 0 fatty acids in Reaction 10 and Reaction 12. Extractable ion chromatogram was obtained using m/z 256 for C16 : 0 fatty acid in the range of retention time 10∼20 min and m/z 284 for C18 : 0 fatty acid in the range of retention time 20∼25 min.