For the other two concentrations, the mine sample was fortified with a mercury nitrate solution [Hg(NO3)2:50gL1 ] to adjust Hg concen- tration levels to 5 ± 0.08 and 10 ± 0.09 lgHgg1 .
For the other two concentrations, the mine sample was fortified with amercury nitrate solution [Hg(NO3)2:50gL1 ] to adjust Hg concen-tration levels to 5 ± 0.08 and 10 ± 0.09 lgHgg1.