MIHAELA DINU, VALENTINA UIVAROSI, MARIA-LIDIA POPESCU, VALERIA RADULESCU, CORINA CRISTINA ARAMA, TEODOR OCTAVIAN NICOLESCU, ROBERT VIOREL ANCUCEANU PROXIMATE COMPOSITION AND SOME PHYSICO-CHEMICAL PROPERTIES OF ABUTILON THEOPHRASTI (VELVETLEAF) SEED OIL
The qualitative chemical study of the Abutilon theophrasti Medik. seed, harvested from the spontaneous flora of Romania revealed the presence of the following classes of biologically active compounds: oil, sterols, free and glycosylated triterpenes, sugars and mixed polysaccharides (mucilages). Oleanolic acid, a triterpenoid sapogenin with biological activity was also identified in the seed. Proximate composition and physicochemical analyses were carried out in the extracted seed oil of Abutilon theophrasti Medik. The average oil content of the seeds was about 10.5 % by weight. The HPLC analysis shows that the obtained oil contains 3.4 % free fatty acids, 11.4% diacilglycerols and 74.5% triacilglycerols. The fatty acids composition determined as methyl esters by GC-MS analysis indicates that the seed oil is rich in linoleic acid (38.96 %), an essential fatty acid. Other saturated and unsaturated fatty acids (palmitic, stearic and oleic) were also identified. The results suggest that the indigenous seeds of Abutilon theophrasti Medik. may be used as a source of linoleic acid.