RESULTS AND DISCUSSION
The analytical features of the developed procedure
were found to be comparable to those reported
in previous papers for copper determination
in environmental samples. For example, the absorbance
of copper solutions showed no difference
for approximately three months. The influence
of different inorganic acids (HCl, HNO3
, and
H2
SO4
) used in the analytical procedure on the
absorbance of copper was also estimated. The nature
of acid showed no significant influence on
the analytical signal. The dependence of the absorbance
of copper on the propane-butane gas