Determination and Identification of Nickel(II) Spectroscopy in Alloy Samples Using Chromogenic Reagent(HPEDN)

Abstract

Abstract A modern and easy procedure performed using the spectrophotometric method and estimating of Ni (II) in alloy samples. Using a ligand 1-((4-(1-(2-hydroxyphenylimino) ethyl)phenyl)diazenyl)naphthalene-2-ol (HPEDN) and a synthesis of the azo-schiff reaction by reaction p-aminoacetophenone with 2-naphtol in first step and reaction of product with 2-aminonaphthol, Ligand and its complex were identification by using UV-Vis. Spectrophotometry (326nm for ligand (HPEDN), 516nm for complex(Ni-HPEDN)), FT-IR, 1H-NMR, and 13C-NMR. The optimal conditions in the complex composition were studied at pH=9, temperature 25°C, and time 15min. The best concentration was found for Ligand (2×10−4 M), Under optimum conditions concentration ranged from (1.1-7.1) μg/mL of Nickel(II) were obeyed Beer‘s Low, with Molar Absorptivity 0.2648×104L.mol−1.cm−1. Limit of Detection(LOD) and Limit of Quantification(LOQ)were 0.3928 and 1.3082μg.mL−1 respectively. The stoichiometric composition of the chelate is 1:2 (Ni:HPEDN). This method is Sensitive, accurate and rapid spectrophotometric method. The results obtained were compared with flame atomic absorption spectrometry method and results are in conformity.