Fi-spectrophotometric determination of Co (II)‎ ions in analytical sample via reaction with a new reagent HPEDN

Abstract EN

A new Spectrophotometric flow injection method has been established for the determination of Co (II) ions in analytical sample.

The method is based on the reaction of Co (II) ions with 1- (4-( 1- ( 2- hydroxyl phenyl amino) ethyl ) phenyl) diazenyl ) naphthalene-2- ol ( HPEDN) reagent in the presence of a Buffer solution has PH equal to 9 to form a red-water-soluble stable complex, that has a maximum orbance at 488 nm.

Beer's law is obeyed in the range of 0.5-12 μg.

ml-1 with a limit of detection (signal/noise=3) of 0.2213 μg.

ml-1 and limit of quantification of 0.7377 μg.

ml-1 and relative standard deviations of 0.65 % , The effect of chemical and physical parameters have been carefully considered and the proposed procedure was successfully applied to the determination of Co (II) ions in analytical sample with a good precision and acCoracy