Rapid determination of methylmercury in fish tissues
2006
Marsalek, P.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie) E-mail:[email protected] | Svobodova, Z.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Verejneho Veterinarniho Lekarstvi a Toxikologie)
The aim of the present study was to develop a rapid and inexpensive method for the determination of methylmercury in fish tissues based on GC/ECD instrumentation. The new method uses acidic digestion in hydrochloric acid and subsequent extraction with toluene. Methylmercury is determined by the GC/ECD technique using a DB-608 capillary column. The following parameters of the method were established: detection limit 13 microg/kg, limit of quantification 22 microg/kg, linearity 0.2-200 ng/mL, reproducibility 9.4%, and recovery 90%. The method was developed and verified using CRM 464 reference material and was successfully tested in inter-laboratory comparisons IMEP - 20 "Trace elements in tuna fish" organised by the Joint Research Centre - Institute for Reference Materials and Measurements (Belgium), with the success rate of En = 0.43.
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