The stability of acid leachates was evaluated under optimized conditions
within 10 days using MRR1 sample. Hg determinations were carried
out for the same leachate in six different times within 10 days.
The RSD value for these six measurements was 3.8%. The paired
Student's t-test (95% confidence level) was also applied to compare
the Hg concentrations obtained in these six measurements for the
same leachate with the Hg concentration obtained by the proposed
MIP OES method for MRR1 sample (Table 7) and no significant difference
was verified (tcalculated=0.68 b tcritical= 2.26).