4. Conclusions
Treatment of oleaginous food samples with sulfuric
acid and 30% hydrogen peroxide allows
atomic absorption determinations by using a single
solution in a faster, more convenient way than
ashing followed by dissolution in aqua regia . Under
the working conditions used, the reagents
employed to digest the samples do not significantly
alter the flame atomic absorption of iron
and copper; nor are there any interferences from
other metals at their typical concentrations in the