Estimation of differences in trace element composition of Bulgarian summer fruits using ICP-MS

G. Toncheva1, K. Nikolova2, D. Georgieva3, G. Antova4, V. Kuneva5

1Department of General and Inorganic Chemistry with Methodology of Chemistry Education, Faculty of Chemistry University of Plovdiv Paisii Hilendarski,
4000 Plovdiv, Bulgaria
2Department of Mathematics and Physics, Faculty of Economics University of Food Technologies, 4000 Plovdiv, Bulgaria
3Department of Analytical Chemistry and Computer Chemistry, Faculty of Chemistry, University of Plovdiv Paissii Hilendarski, 4000 Plovdiv, Bulgaria
4Department of Chemical Technology, Faculty of Chemistry, University of Plovdiv Paissii Hilendarski, 4000 Plovdiv, Bulgaria
5Department of Mathematics, Physics and Informatics, Faculty of Economics, Agricultural University, 4000 Plovdiv, Bulgaria
(Manuscript received 14 May 2016; accepted for publication 20 June 2016)

Abstract. The content of potentially essential and toxic elements: chromium, manganese, iron, copper, nickel, cadmium and arsenic in Bulgarian fruits such as aronia, morello, cherry, raspberry, nectarine peach, apple type „akane” and pear type „early gold” were investigated. By using the ICP-MS we found that raspberry has the highest content of iron (4635.9 ± 53.2 μg kg-1), manganese (5690.9 ± 31.7 μg kg-1) and chromium (150.2 ± 2.5 μg kg-1), while the richest in copper is the nectarine (887.5 ± 31.19 μg kg-1). The content of toxic elements (nickel, cadmium and arsenic) is in amount significantly below the permissible standards. Single ANOVA and subsequent Dunkan’s test were used to define the fruit and to estimate the significance of chemical elements. The test for multidirectional comparisons indicated that for five of the investigated seven elements: iron, copper, nickel, cadmium, and arsenic the fruits are statistically distinguishable. According to hierarchical cluster analysis the fruits are into one cluster.