In order to evaluate the selectivity of the proposed analytical
procedure (i.e. the absence of inorganic mercury in the final
extract),
samples of IAEA-436,
IAEA-452 and DOLT-2 were treated
following the procedure 1 and the speciation of mercury in the
organic extracts determined after aqueous-phase ethylation,
purge-trap, gas chromatography separation, followed by pyrolysis
and atomic fluorescence spectrometry detection (GC–Py–AFS) as
described in Carrasco and Vassileva (2014).