The aim of this master's thesis was to determine the contents of cadmium, lead and mercury in sea fish. Fresh and frozen fish from 17 FAO localities were bought in Czech markets. The theoretical part of this work describes the determined heavy metals and their relation to the environment. All 30 analyzed fish species are also described here. Atomic absorption spectrometry technique was used for determination of cadmium, lead and mercury concentration in the practical part of the work. Twelve samples exceeded the maximum levels for mercury (0.5 mg/kg or 1 mg/kg for selected fish species) and three fish samples exceeded the maximum level for cadmium (0.05 mg/kg) set by Commission Regulation (EU) No 1881/2006, as amended. The maximum level of lead concentration (0.3 mg/kg) was not exceeded in any fish sample. Results of this work show, that samples of marlin (Tetrapturus albidus) and swordfish (Xiphias gladius) are one of the most contaminated fish which can pose a great risk for human health after regular consumption. Because mercury and cadmium contents in some samples were higher than maximum levels recommended by World health organization WHO and Czech legislation, our research initiated an investigation of CAFIA, which led to withdraw some batches of the fish from the Czech markets.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:430396 |
| Date | January 2017 |
| Creators | Smolíková, Vendula |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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