Abstract

UDDIN, Yasir et al. Estimation of Various Physicochemical Properties of Walnut Oil from Different Areas of Northern Kpk, Pakistan. J. Mex. Chem. Soc [online]. 2021, vol.65, n.4, pp.572-581.  Epub Feb 28, 2022. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v65i4.1512.

In this study, the physicochemical properties of walnut (Juglans regia L.) oils collected from different sites in Khyber PakhtoonKhwa (KPK), Pakistan were investigated. The obtained walnut oils showed variation in viscosity, surface tension, density, acid, saponification, and iodine values. The oil obtained from the Madyan (Sample E) showed the lowest density (0.981 g/cm3), surface tension (34.76×10-3 N/m), viscosity (15.0595 cp) saponification values 84.15 (mg KOH/g of oil) and acid value 3.5 (mg KOH per gram oil) amongst all. The physicochemical properties of all the oils were also compared to olive oil (standard) where sample E showed similarities in such properties compared to olive oil. Moreover, higher concentrations of oleic acid (41 %) and linoleic acid (9 %) were detected in the walnut oil of sample E in GC/MS analysis. The similarities of walnut oil obtained from Madyan to that of standard (olive oil) thus affirm it as best quality oil and suitable for food processing purposes.

Keywords : Juglans regia L; walnut oil; physicochemical parameters; GS/MS analysis.