Heavy metal concentrations (Cd Pb Cu,,,, Fe Mn and Zn) were determined.Using GBC 932 plus a flame atomic absorption spectrophotometer (FAAS; VARIANCE.SpectrAA 55B). The absorption wavelength and detection limit were.228.8 nm and 0.05 ppm, for Cd 283.3 nm and 1.0 ppm, for Pb 324.8 nm and.0.2 ppm, for Cu 248.3 nm and 0.3 ppm for Fe 279.5 nm, and 0.1 ppm, for Mn213.9 nm and 0.05 ppm for Zn.
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