“…Other elements targeted in species analysis in marine organisms include selenium [21][22][23], copper, zinc and cadmium [24]. The distribution of selenium between fractions with different MW has been presented in different fish species [25,26], while some investigations of soluble element species in food (such as soybean flour, pea and lentil seeds and white bean seeds) were reported by Koplík et al [27,28], in which data were presented on the fractionation of Mn, Fe, Co, Ni, Cu, Zn, Se, Mo and P species in different MW ranges.…”