01769nam a2200229Ia 4500003001000000005001700010040000900027245009000036490007300126520096800199650002501167650002401192650002301216650001501239700001501254700001701269700002201286700001701308700001701325856015601342008004101498MX-MdCICY20260521091744.0  cCICY10aGC-MS method for characterization and quantification of sitostanol oxidation products0 vournal of the American Oil Chemists' Society, 81(2), p.135-141, 20043 aA new GC-MS method for characterization and quantification of phytosterol oxidation products was developed. Applicability of this method was tested by characterizing sitostanol oxides formed in bulk and then quantifying selected oxides in purified rapeseed oil and tripalmitin matrices in which the complex matrix made oxide analysis difficult. In bulk, nine different sitostanol oxides were characterized, including epimers of 7- and 15-hydroxysitostanol and 6- and 7-ketositostanol. In both lipid matrices, the amounts of sitostanol oxides generated in thermo-oxidation were very low. According to statistical analyses, depending on the oxide, the GC-MS results were the same or slightly higher than those quantified by the more common GC-FID method. Thus, GC-MS provides a powerful alternative for characterization and quantification of phytostanol oxides found in low amounts in complex matrices and is a promising method for future phytosterol oxide studies.14aGC-MS QUANTIFICATION14aOXIDATIVE STABILITY14aPHYTOSTEROL OXIDES14aSITOSTANOL12aSoupas, L.12aJuntunen, L.12aSäynäjoki, S.12aLampi, A. M.12aPiironen, V.40uhttps://drive.google.com/file/d/13uwTwwk584FxPSvns1_t9I0AgHuTxhil/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d