2.4. Sample analysis
The digested water samples were analyzed for the presence of
Copper, Zinc and Lead using the scientific Nov 300 Atomic
Absorption Spectrophotometer. The calibration plot method
was used for analysis. The air acetylene was the flame used
and hallow cathode lamp of the corresponding element was
the resonance. Line source, the wave length for the determination
of three elements were 283.31, 324.7 and 213.9 nm for
Lead, Copper and Zinc respectively. The digested samples
were analyzed in triplicates with the average concentration of
metals being displayed in mg/L by the instruments after
extrapolation from the standard curve.