20.500.12556/RUL-167494 Maščobno kislinski profil rastlinskih olj Fatty acid profile of vegetable oils Namen dela je bilo določiti rastlinsko olje z največjo vsebnostjo linolne kisline s plinsko kromatografijo (GC). Analizirali smo enajst vzorcev rastlinskih olj in en vzorec živalske maščobe. Kot detektor smo uporabili masni spektrometer (MS), ki ponuja visoko selektivnost in občutljivost. GC-MS pogoje smo optimizirali tako, da smo dobili dobro ločene spektre posameznih estrov maščobnih kislin. Analizno metodo smo delno validirali in potrdili ustrezno linearnost, natančnost, točnost in ponovljivost. Sončnično olje je imelo tretjo najvišjo vsebnost linolne kisline, a se je zaradi svoje dostopnosti, cenovne ugodnosti in drugih fizikalnih lastnosti, izkazalo za najbolj primerno rastlinsko olje za emulzijsko elektropredenje nanovlaken. Elektropredene tkanine iz nanovlaken z visokim razmerjem med površino in prostornino so bile namreč v zadnjih letih večkrat predmet preučevanja, kot mogoča rešitev za podaljšanje roka uporabnosti sadja in zelenjave. Emulzijski sistemi za elektropredenje nanovlaken vsebujejo oljno in vodno fazo v kateri je linolna kislina biološki prekurzor biosinteze heksanala, ki zaradi protimikrobnega delovanja zavira zorenje sadja in zelenjave. The aim of the work was to determine the vegetable oil with the highest linoleic acid content by gas chromatography (GC). Eleven vegetable oil samples and one animal fat sample were analyzed. A mass spectrometer (MS) was used as the detector, which offers high selectivity and sensitivity. The GC-MS conditions were optimized to obtain well-separated spectra of individual fatty acid esters. The analytical method was partially validated and confirmed to have adequate linearity, precision, accuracy and repeatibility. Sunflower oil had the third highest linoleic acid content, but due to its accessibilizy, affordability and other physical properties, it proved to be the most suitable vegetable oil for emulsion electrospinning of nanofibers. Electrospun nanofiber fabrics with a high surface area to volume ratio have been studied several times in recent years as a possible solution for extending the shelf life of fruit and vegetables. Emulsion system for electrospinning nanofibers contain an oil and water phase in which linoleic acid is a biological precusros for the biosynthesis of hexanal, which inhibits the ripening of fruits and vegetables due to its antimicrobial activity. rastlinska olja plinska kromatografija masna spektrometrija maščobne kisline vegetable oils gas chromatography mass spectrometry fatty acids true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-02-25 07:40:02 2025-02-25 07:40:13 2025-03-07 09:56:31 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 22946 228274947 Kuret_Tajda_-_Mascobno_kislinski_profil_rastlinskih_olj.pdf Kuret_Tajda_-_Mascobno_kislinski_profil_rastlinskih_olj.pdf 1 ECCD329F01856F2D29FF11AA75F3BF9B 71926440636bac9e600d06342eba8acc8ab32202aaf89f792dcfa2ad3e714b9a 7414451c-f342-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200008 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0