All the chemicals procured and applied in this study were analytical grade. Stock solution of Zinc was
prepared using Zn(NO3)2.6H2O in distilled water. Different desire concentrations of Zn2+ were prepared by diluting 10000 mgL-1 of the stock solution. Standard solution of Zn2+ (1000 mgL-1) for atomic absorption spectrophotometer was obtained from Merck.