title: Inorganic arsenic in seafood: does the extraction method matter?
abstract: Nine different extraction methods were evaluated for three seafood samples to test whether the concentration of inorganic arsenic (iAs) determined in seafood is dependent on the extraction method. Certified reference materials (CRM) DOLT-4 (Dogfish Liver) and TORT-2 (Lobster Hepatopancreas), and a commercial herring fish meal were evaluated. All experimental work described here was carried out by the same operator using the same instrumentation, thus eliminating possible differences in results caused by laboratory related factors. Low concentrations of iAs were found in CRM DOLT-4 (0.012±0.003mgkg(-1)) and the herring fish meal sample (0.007±0.002mgkg(-1)) for all extraction methods. When comparing the concentration of iAs in CRM TORT-2 found in this study and in the literature dilute acids, HNO3 and HCl, showed the highest extracted iAs wheras dilute NaOH (in 50% ethanol) showed significantly lower extracted iAs. However, most other extraction solvents were not statistically different from one another.
authors.affiliation: TESLA-Trace Element Speciation Laboratory, Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, UK; MATIS, Environment and Genetics Department, Vinlandsleid 12, Reykjavik 113, Iceland.
authors.forename: Ásta H
authors.initials: ÁH
authors.lastname: Pétursdóttir
authors.affiliation: MATIS, Environment and Genetics Department, Vinlandsleid 12, Reykjavik 113, Iceland.
authors.forename: Helga
authors.initials: H
authors.lastname: Gunnlaugsdóttir
authors.affiliation: TESLA-Trace Element Speciation Laboratory, Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, UK; ACES-Aberdeen Centre of Environmental Sustainability, University of Aberdeen, AB24 3UU Scotland, UK.
authors.forename: Eva M
authors.initials: EM
authors.lastname: Krupp
authors.affiliation: TESLA-Trace Element Speciation Laboratory, Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, UK. Electronic address: j.feldmann@abdn.ac.uk.
authors.forename: Jörg
authors.initials: J
authors.lastname: Feldmann
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis* / Q000302:isolation & purification*; D005591:Chemical Fractionation / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D017747:Seafood / Q000032:analysis*
chemical_list: D001151:Arsenic
keywords: Analytical chemistry; Arsenic; Feed; Inorganic; Marine; Speciation; Species