Determination of trace elements in cabbage (Brassica oleracea L.var.acephale) and its grown soil at the Black sea region in Turkey

Purpose: The most consumed urban crops having many benefits for human health in the northeast Black Sea black cabbage (Brassica oleracea L.var.acephale) leaf and theirs own grown soils were collected from Black Sea cities and towns; Rize, Trabzon, Giresun, Ordu ve Samsun of Turkey from totally 55 stations to determine the element levels in percent of the black cabbage. It is purposed that to obtain the data for each city in terms of element distribution. This study is a very comprehensive work covering almost the entire eastern Black Sea region for elemental measurements in black cabbage and its soil and comparing them between provinces and districts. Method: The samples were analyzed by using Energy Dispersive X-Ray Fluorescence (EDXRF) technique that is a nondestructive method by giving reliable results. The obtained data were evaluated by using the ordinary cricking method and some statistical methods (Mann-Whitney- U Test, Oneway-ANOVA, Pearson and Spearman-Brown correlation test) to determine the correlations between soils, the black cabbage and both compared the element levels between the sampling points. The statistical analysis in soil and black cabbage samples were carried out for 19 and 11 elements, respectively. Results: Mg (Magnesium), K (Potassium), Ca (Calcium), Al (Aluminum), Si (Silica), P (Phosphor), S (Sulphur), Ti (Titanium), Fe (Iron), Sr (Strontium), V (Vanadium), Cr (Chromium), Mn (Manganese) for the black cabbage sample and Na (Sodium), Mg, Al, Si, P, S, K, Ca, Ti, Fe, Cu (Copper), Zn (Zinc), Sr, V, Cr, Mn, As (Arsenic), Rb (Rubidium) and Pb (Lead) for soil samples were determined. The determining elements for soils and the black cabbage samples were compared between the working provinces. Conclusions: The obtained data showed that the element distribution is similar and not showed a statistical difference for both between each station and cities. Besides, the trace elements in soils are not much affected the black cabbage however Al was found in the cabbage even it is less. © 2020 Taylor & Francis Group, LLC.