Abstract
A new method consisting of methanol–methyl isobutyl ketone (MIBK)–water extraction and open-column cation exchange chromatography followed by HPLC was developed for the separation of total, residual, lipid-soluble, and five water soluble arsenic species including AsB, MMA, DMA, As(III), and As(V) in selected Canadian seafood samples. The mass fractions of arsenic were determined by neutron activation analysis with a detection limit of less than 20 µg kg−1. The method was validated by analyzing reference materials. The MIBK phase contained most of the lipid-soluble arsenic and indicated a linear relationship between the lipid content and lipid-soluble arsenic.
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