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).