The dry fractionation of some adulterated vegetable oils

The paper analyses the results of capitalization (recovery) studies by dry fractionation of some saponifiable vegetable fatty systems (saturated and unsaturated) (mono and/or polyunsaturated) from pumpkin oil processed by cold compressing (Cucurbita Pepo, styriaca variety) adulterated with 5 – 10 % sunflower oil (Helianthus Annus) wich modified the structure of a functional aliment with monitored destination, but precious material wearer of fatty fractions [C12:0, C14:0, C14:1, C16:0, C16:1]. The individual recovery of some superior mono and polyunsaturated acids [C18:1, C18:2, C18:3] with physiological recognized importance, recorded in literature a continuous interest. The main physical - chemical and chemical parameters of oils, individually or in combination [aspect, density, cinematic and dynamic viscosity, refraction index, iodine index (Wijs), acidity, esterification, saponification and chromatography distribution], were determined as work premises, to optimize the monitored efficiency of the superior mono and/or polyunsaturated acid dictated previously.
Fractioned crystallization also dictated the rigorous nominalization of unitary operations in a coherent diagram from which can be collected a defined succession of fatty fluid (liquids) and/or solid fractions, depending on work parameters (temperature gradients, filtration speeds, thermostated centrifugation, etc.). After repeated separations were certificated notable analytical purities of isolated structures. It was conferred attention to environment and/or agropedoclimatic characteristics of mentioned vegetable oils provenience geographic areas by connecting of the two trophic chain major bangles soil (environment) – herb. There were determined the evolution and the weight transfer of heavy metallic cations [Mn, Zn, Cu, Co, Ni, Cr, Pb, Cd] in the track soil – herb – dry fraction. It was used the biologic material afforded by two private agroalimentary farms with integrated vegetable processing from the South – West of Romania (counties Timiş and Caraş – Severin), first one situated in a geographic area without excessive geogenic pollution with heavy metals mentioned cations, with clay soils, such as stagnic albis luviosoil and the second one placed in geographic area more geogenic and antropic polluted with heavy metals cations, situated 3 – 5 km far from a power-station, respectively underground mining.
The balance of heavy metals cations in the analyzed system by their presence under the international accepted limits justifies the researches and encourages their extending in the future.