Abstract: A comparative study on elemental composition of various hazelnut (Corylus avellana L.) samples was conducted by using a sensitive method, wavelength dispersive X-ray fluorescence (WDXRF). Twenty-eight elements, such as Al, As, Bi, Ca, Cd, Cu, Fe, Mn, Ni, P, S, Sr, Zn, Cl, Pb, K, Mg, Na, Ba, Rb, Si, Br, Cr, F, La, Se, Ti and Zr, were determined in hazelnut samples (n=10) grown under organic and conventional farming regimes. The obtained results from each group were analyzed statistically by using SPSS statistic program. It was observed that the concentration and peak intensity values of Ca, Fe, Mn, P, Mg, Zn, Cl, Na, Br, Rb, F, K and Se elements were higher in hazelnut samples grown under organic farming regime but Al, Cr and Ni levels were found to be higher in samples grown under conventional farming regime. As, Bi, Cd, Pb, Ti and Zr contents were below the detection limits. Our findings clearly revealed that organic hazelnuts are likely to have higher nutritional mineral content. And the hazelnuts samples grown under conventional farming regime could contain harmful metals like Al, Cr and Ni that might affect the various systems and/or organs of humans and animals.
Reference: Akbaba, U., Sahin, Y., Turkez, H. (2011). Comparison of element contents in hazelnuts grown under organic and conventional farming regimes for human nutrition and health. Fresenuis Environmental Bulletin 20(7): 1655-1660.