Procedure:

● Activate boron-doped diamond electrodes using 2M nitric acid.
● The boron-doped diamond electrode is used as a working electrode, the counter electrode is Pt wire, and the reference electrode is Ag/AgCl.
● Clean the electrochemical cell with double distilled water and pour 10 ml prepared solution of 2M nitric acid.
● Run cyclic voltammetry using software NOVA 1.11
● Empty the electrochemical cell and clean it with double distilled water.
● Pour 10 ml of ammonium acetate buffer (pH 4.5) into the cell.
● Add 12µg/ml concentration of lead nitrate, copper chloride, and cadmium nitrate solution separately.
● Using NOVA 1.11 interface, square wave voltammetry, and differential pulse voltammetry techniques were employed and voltammograms were recorded.