A sequential extraction procedure followed by HPLC–ICP-MS analysis was developed for the speciation
and quantization of arsenic species in dry seafood products (DSPs). The extraction process involved three
major steps, which produced respectively three As fractions: non-polar (Asnonpolar), polar (Aspolar) and
inorganic arsenic species (Asinorganic). The extraction efficiency (EE%) is in the range of 87–115%. Asnonpolar
is 0.6–10.2% of total arsenic in DSPs, which is served as the index of level of arsenolipid. For Aspolar and
Asinorganic, a hyphenated HPLC–ICP-MS technique was established for the separation and quantification of
six arsenic species including arsenobetaine (AsB), arsenocholine (AsC), arsenite (AsIII), arsenate (AsV),
monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA). The results indicate that AsB and
AsV are the two dominate species in DSPs, while all other species are present in relatively low concentrations.
The recovery efficiency of 77–02.8% could be obtained with spike recovery test in this two-steps
extraction.