Seminar: Spectrophotometric Determination of Cerium (III) with Arsenazo III: Application to Sea Water and Synthetic Alloy”
On November 15, 2023, a seminar titled ” Spectrophotometric Determination of Cerium (III) with Arsenazo III: Application to Sea Water and Synthetic Alloy” was delivered by Dr. Ghaydaa. Throughout the seminar Dr. Ghaydaa highlighted that the detailed investigation of a sensitive and selective spectrophotometric method for the determination of trace amounts of cerium is described. The method is based on the reaction of cerium(III) with arsenazo ш in the presence of sodium dodecyl sulphate surfactant at pH 3.0 to form a blue-greenish coloured chelate absorbing maximum at 653 nm. Beer’s law is obeyed over the range (5-70) µg /25 ml, with a molar absorptivity of (4.99×104 ) l.mol 1 .cm -1 and the coefficient of determination (r2 ) is 0.9994, Sandell’ s sensitivity index is (28.08×10-4) µg.cm-2, a relative error of (0.0-0.2%) and a relative standard deviation of (0.0 to +2.1)%, depending on the concentration levels in the calibration curve. The method has been applied successfully to determine cerium in sea water and some synthetic alloys.
