Journal
CZECH JOURNAL OF FOOD SCIENCES
Volume 30, Issue 3, Pages 276-284Publisher
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/239/2011-CJFS
Keywords
total mercury; methylmercury; muscle; liver; gonads; scales; MeHg/THg ratio; fish consumption
Categories
Funding
- Ministry of Education, Youth and Sports of the Czech Republic [MSM 6215712402, IGA 84/2010/FVHE]
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The aim of the study was to describe the distribution of total mercury in the tissues of fish originating from important Czech fishing locations and to determine the level of methylmercury as a percentage of total mercury (Hg speciation). At six important fishing locations a total of 144 fishes of 13 species were caught and analysed. Samples of muscle, liver, gonads and scales were analysed for total mercury and in the case of muscles for methylmercury concentrations. Total mercury was determined by AAS using an AMA 254 analyser, and methylmercury determination was performed by GC/ECD using a GC-2010A chromatograph. Total mercury concentrations in muscle and other tissues of all the fish from all fishing locations were below 0.5 mg/kg, with the exception of 6 asps (Aspius aspius). A significant (P < 0.05) correlation was found between the total mercury concentrations in scales and other tissues. Methylmercury made up about 46-100% of total mercury in muscle. The overall results confirmed the good hygienic quality of fish from important Czech fishing locations.
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