Spectrophotometric Determination of Micro Amount of Chromium (III) Using Sodium 4-((4,5-diphenyl-imidazol-2-yl)diazenyl)-3-hydroxynaphthalene-1-sulfonate in the Presence of Surfactant, Study of Thermodynamic Functions and Their Analytical Applications

Using sodium4-((4,5-diphenyl-imidazol-2-yl)diazenyl)-3-hydroxynaphthalene-1-sulfonate (SDPIHN) as a chromogenic reagent in presence of non-ionic surfactant (Triton x-100) to estimate the chromium(III) ion if wavelength this 463 nm form dark greenish-brown complex 586 at pH=10,the was stable for longer than 24 hours. Beer's low, molar absorptivity 0.244×104L.mol-1.cm-1, and Sandal's sensitivity 0.021 µg/cm2 are all observed concentration range 1-11 µg/mL. The limits detection (LOD) limit quantification (LOQ), respectively, were 0.117 µg/mL 0.385µg/mL. (mole ratio technique, job's method) employed investigate stoichiometry complexes, both methods revealed that metal is equal 1:3.The absorption impact value concentration, pH, reaction duration, temperature, addition sequences, ionic strength, masking agent, influence many parameters such affect cations anions, among others. temperature on reaction, which referred an exothermic also taken into account while calculating thermodynamic functions. Researchers investigated some solid's physical properties, solubility, conductivity, melting point, part its development. UV-visible rays used chromium complex, Relative Standard Deviation (RSD%) Error (E %) assess precision accuracy novel method.