SPME-GC-pyrolysis-AFS determination of methylmercury in marine fish products by alkaline sample preparation and aqueous phase phenylation derivatization.
Characterization of a cost-efficient analytical method based on alkaline sample digestion with KOH and NaOH, followed by aqueous phase phenylation derivatization with NaBPh4 and solid phase microextraction (SPME) for the determination of methylmercury in typical fish-containing food samples commercially available in Hungary, is reported. The sample preparation procedure along with the applied SPME-GC-pyrolysis-AFS system was validated by measuring certified reference materials (CRM) BCR-464, TORT-2, and a candidate CRM BCR 710. To carry out an estimation of average Hungarian methylmercury exposures via marine fish and/or fish-containing food consumption, 16 commercially available products and 3 pooled representative seafood samples of-according to a previous European survey--the three most consumed fish species in Hungary, herring, sardines, and hake, were analyzed. Methylmercury concentrations of the analyzed samples were in the range 0.016-0.137 microg of MeHg g(-1) dry weight as Hg.
Jókai
Zsuzsa
Z
Department of Applied Chemistry, Corvinus University of Budapest, Villányi út 29-33, 1118 Budapest, Hungary.
Abrankó
László
L
Fodor
Péter
P
D002849:Chromatography, Gas / Q000379:methods*; D004781:Environmental Exposure; D005396:Fish Products / Q000032:analysis*; D005506:Food Contamination; D006814:Hungary; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides; D008767:Methylmercury Compounds / Q000032:analysis*; D010649:Phenylalanine / Q000737:chemistry*; D017680:Potassium Compounds; D011786:Quality Control; D015203:Reproducibility of Results; D012972:Sodium Hydroxide; D014867:Water
D006878:Hydroxides; D008767:Methylmercury Compounds; D017680:Potassium Compounds; D014867:Water; D010649:Phenylalanine; D012972:Sodium Hydroxide; C029943:potassium hydroxide