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

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.

Spectrophotometric determination of Co (II) in analytical sample using anew chromogenic reagent (PTMH)

“…Figure 3 show the ligand spectrum, one carbone of the azomethine group (C=N) is represented by the signal band at (145.0 ppm), the (140.9 ppm) signal band belongs to one carbon in the benzene ring that is linked to nitrogen (C-N), the multiple band at (131.9, 127.5, 126.5, 125.6 ppm) and (129.0, 121.6, 118.7, 114.4, 111.8 ppm) belongs to carbons thiophene and aromatic ring, respectively. The single band at (39.5ppm) related to solvent (DMSO-d6) [21] .…”