Inorganic arsenic in seafood: does the extraction method matter?

Ásta H Pétursdóttir; Helga Gunnlaugsdóttir; Eva M Krupp; Jörg Feldmann

doi:10.1016/j.foodchem.2013.11.005

Inorganic arsenic in seafood: does the extraction method matter?

Food Chem. 2014 May 1:150:353-9. doi: 10.1016/j.foodchem.2013.11.005. Epub 2013 Nov 13.

Authors

Ásta H Pétursdóttir¹, Helga Gunnlaugsdóttir², Eva M Krupp³, Jörg Feldmann⁴

Affiliations

¹ 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.
² MATIS, Environment and Genetics Department, Vinlandsleid 12, Reykjavik 113, Iceland.
³ 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.
⁴ 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.

PMID: 24360462
DOI: 10.1016/j.foodchem.2013.11.005

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.

Keywords: Analytical chemistry; Arsenic; Feed; Inorganic; Marine; Speciation; Species.

Publication types

Comparative Study
Research Support, Non-U.S. Gov't

MeSH terms

Animals
Arsenic / analysis*
Arsenic / isolation & purification*
Chemical Fractionation / methods*
Food Contamination / analysis*
Seafood / analysis*

Substances

Arsenic