First, the UTEVA resin located in a methacrylate column (0.4 g)
which was externally connected to one port and is conditioned
with 2 mL of 3 mol l1 HNO3 at a flow rate of 2 mL min1,
then 10 mL of sample are passed through the column at a flow rate of 0.8 mL min1.