Rapid determination of methylmercury in fish tissues

https://doi.org/10.17221/3309-CJFSCitation:Maršálek P., Svobodová Z. (2006): Rapid determination of methylmercury in fish tissues. Czech J. Food Sci., 24: 138-142.
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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 is based on 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 μg/kg, limit of quantification 22 μg/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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