Spectrophotometric Determination of Micro Amount of Zinc (II) using Sodium 4-((4,5-Diphenyl-Imidazol-2-Yl) Diazenyl)-3-Hydroxynaphthalene-1-Sulfonate (SDPIHN) In the Presence of Surfactant, Thermodynamic Functions and Their Analytical Applications Are Stu

Abstract

Anew easy, quick, highly selective and spectrophotometric sensitivity technique has already been expanded find out zinc (II) ion by using sodium 4-((4,5-diphenyl-imidazol-2-yl) diazenyl)-3-hydroxynaphthalene-1-sulfonate (SDPIHN) as chromogenic reagent (ligand) in presence of non- ionic surfactant (Triton x-100) at (PH=10.5) to form a dark brown complex in wavelength (599 nm). At the specified PH, the compound remained stable for four hours. In the concentration range (1µg/mL-12µg/mL), Beer's low is observed, along with molar absorptivity(0.2229x10⁴L.mol^-¹.cm^-¹) and Sandal's sensitivity (0.0293 µg/cm²). (0.227 µg/mL) and (0.749 µg/mL), respectively, were the limits of detection (LOD) and Limit of quantification (LOQ). (Mole ratio technique, job's method) were used to investigate the stoichiometry of complexes, and the two approaches suggested that the metal to reagent ratio is (1:2). The reagent concentration's absorption effect's value, surfactant concentration, PH, reaction duration, temperature, addition sequences, ionic strength, masking agent, and the influence of many parameters such as affect cations and anions, among others. Thermodynamic functions were also computed by looking at temperature's influence on the reaction, which was referred to as an endothermic reaction. As part of the complex solid's creation, researchers investigated some of its physical properties, like solubility, molar conductivity, and melting point. The zinc complex generated was examined using UV-visible rays, and the new method's precision and accuracy were assessed using Relative Standard Deviation (RSD%) and Relative Error (E%).