First of all,the sample preparation procedures must be efficient to extract and preconcentrate the analytes,
as well as to eliminate the interferents due to the high complexity
of thebiological samples(e.g.thepresenceofmacromolecules),
low concentrationsofanalytesandlowsamplevolumeavailability.
Accordingtotheliterature,mineralizationproceduresusingdi-
gestorblocks,ovensand/ormicrowaveovensarethemostused
methods forbiologicalsamplepreparationofmetalanalyses [2–4].
Despite thewideuseofthesetechniques,somedrawbackscan
also bepointedout,suchastheneedtohighacidicconcentrations