The influence of SDS on the percentage of complexed ions adsolubilized
was investigated by shaking 250 mL of a solution containing
50 lg of each ion through solid phase containing various
amounts of SDS, 0.8 g c-Al2O3; 15 mg 2-HIYPMI. In the absence
of SDS, metal ions retained on 2-HIYPMI–alumina with efficiency
lower than 60% for all ions. The retention of metal ions on hemimicelles,
which have a hydrophobic surface, was clearly dependent
on analyte complex polarity. Therefore, addition of SDS is necessary.
At surfactant concentrations higher than about 3.75 mg/g alumina
for 2-HIYPMI as chelating agents a decrease in the percentage
of ions retained was observed as a result of the formation of micelles.
The adsorption amount began to decrease when the SDS
added exceeded the above mentioned value. It can be explained