Effect of the type of acid solution
To investigate the influence of the matrix on
the homogeneous liquid–liquid extraction of lead (II),
different concentrations of HNO3, HCl and H2SO4
were tested. H2SO4 solution gave a high viscous drop
which was not suitable for the uptake into a microsyringe.
In case of HNO3 and HCl, both acids gave the
volume of the sedimented phase to be not significantly
differed. However, 8.0 M HCl solution resulted in
greater recovery percents for lead(II).