Abstract
Methylmercury (MeHg) has been determined in fish reference materials by direct mercury analyzer (DMA 80) and FIA-CV-AAS. In order to evaluate accuracy, certified reference materials (Fish protein, NRCC - Dorm 4 and fish material, Ipen - Dourada 1) were analyzed after extraction and separation of mercury species. Good agreement of the results have been obtained (relative error of the determination between the methods varied from 1.5% to 39%). The repeatability of the results varied from 4% to 26%.
Highlights
Monomethylmercury (MeHg) is the most commonly occurring organo-mercury compound and one of the most toxic, and it is recognized as a major environmental pollution issue and health hazard for humans
An important feature of these studies was that measurements were conducted by two different methods, direct mercury analyser (DMA) and atomic absorption spectrophotometry with cold vapor generation and flow injection (FIA-CV-AAS), and its results were compared
The samples solutions were inserted into the sample introduction system of an atomic absorption spectrophotometer (FS-SpectrAA220 Varian Australia Pty Ltd.) and methylmercury is determined by the technique of atomic absorption spectrophotometry with cold vapor generation and flow injection (FIA-CVAAS)
Summary
Monomethylmercury (MeHg) is the most commonly occurring organo-mercury compound and one of the most toxic, and it is recognized as a major environmental pollution issue and health hazard for humans. Contaminated seafood is the major route of exposure for humans to MeHg. Contaminated seafood is the major route of exposure for humans to MeHg It represents, on average, 85 % of the total mercury present in fish [1]. The systems that combine sample combustion (thermal decomposition in the presence of O2), Hg amalgamation, and atomic absorption spectrometry has already been proven to be an effective method to obtain reliable results [7,8,9]. An important feature of these studies was that measurements were conducted by two different methods, direct mercury analyser (DMA) and atomic absorption spectrophotometry with cold vapor generation and flow injection (FIA-CV-AAS), and its results were compared
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