3.1. Selection of extractant agent
This assay focused on the study of a quantitative species extraction method system for seafood matrices, suitable for the
subsequent determination technique. Extraction methods performed by several authors during the last five years are summarised in Table 1. Both acidic and basic extraction methods are described. However, there is no knowledge about standardised extraction methods in seafood matrices. Therefore, to perform the extraction of Hg species in seafood, a preliminary test selecting two different extractant agents was run, to assess the main Hg species extracted