Seven heavy metals were determined in nine samples of Pangasius hypophtalmus tissues purchased in Czech markets during the period November 2013 -- February 2014. Fresh samples were lyophilised and subsequently decomposed by 65% HNO3 in microwave oven. Heavy metals were determined by flame atomic absorption spectrometry (Cu, Fe, Zn) and electrothermal atomic absorption spectrometry (Cd, Cr, Ni, Pb). The certified reference material DORM-4 was used for method validation. The content of the studied elements in the samples was: Cd (< 0,18 -- 4,41 ug/kg FW), Cr (< 6,0 -- 26,2 ug/kg FW), Cu (0,32 -- 0,56 mg/kg FW), Fe (0,58 -- 1,74 mg/kg FW), Ni (43,7 -- 228,2 ug/kg FW), Pb (< 3,3 -- 26,4 ug/kg FW) and Zn (3,70 -- 6,33 mg/kg FW). The results were compared with literature and the risk of negative effects on the human body connected with common consumption of meat was evaluated. Studied samples of Pangasius hypophtalmus tissues were found to be harmless for people diet.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:250694 |
| Date | January 2015 |
| Creators | Chadimová, Klára |
| 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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