Fish are an important part of the human nutrition all over the world, because they are rich in proteins, numerous vitamins and essential elements. In the context of the CRP project, whose objective is to monitor the quality of the fish on the Slovenian market, we analysed the content of essential and toxic elements in two groups of fish. The first group consists of farmed Atlantic salmon (Salmo salar) and the trout (Oncorhynchus mykiss), in the second group are the European seabass (Dicentrarchus labrax) from two fish farms and wild fisheries. Concentrations of Hg were elevated only in the European seabass from wild fisheries (between 126 and 2384 ng/g fresh weight), while in the other fish species concentrations were between 11 and 166 ng/g fresh weight, which is on average approximately 10 times lower than the maximum allowed level (1000 ng/g) for predatory fish. The MeHg in fish comprised over 54% and amounted to 100%.The levels of the toxic metals As, Cd and Pb are comparable with the literature, the concentrations of Cd and Pb are below.
COBISS.SI-ID: 26285607
Mussels Mytilus galloprovincialis collected in nature or purchased, originating from various locations (Slovenian coastline, Italy and NE Pacific) were analysed by the techniques of hydride generation atomic fluorescence spectrometry (HG-AFS) and liquid chromatography coupled to inductively coupled plasma mass spectrometry (HPLC-ICP-MS) in order to assess total selenium (Se), its species, its distribution in raw and cooked soft tissues. Total Se concentrations in raw mussels ranged between 1.91 to 8.27 µg/g DM, while in cooked ones, Se concentrations were halved. Selenium species identified were selenomethionine (SeMet) and selenocystine (SeCys2), but the trimethylselenonium ion (TMSe+) was not found in these samples. The sum of identified selenium species ranged from 7 % to around 38 % of the soluble Se. In addition, the concentrations of the metals Cr, Mn, Co, Ni, Cu, Zn, As, Cd and Pb were determined by ICP-MS after microwave digestion in mussel bought on the market. Cd, As, Cu and Co had lower concentrations in cooked than in raw mussels; they followed the same trend as selenium.
COBISS.SI-ID: 25821991