RESULTS AND DISCUSSION
The analytical features of the developed procedure were found to be comparable
to those reported in previous papers for the determination of iron in environmental
samples. The calibration curve obtained under the best conditions showed a
linear correlation within the concentration range from 0.1–4.0 g ml–1. The influence
of the different inorganic acids (HCl, HNO3, and H2SO4) used in the analytical
procedure on the absorbance of iron was estimated. It was determined that the
nature of the acid does not influence the analytical signal significantly. It is interesting to note that the absorbance of the iron solutions showed no difference for approximately
three months.