Study of Absorption Spectrum of Murexide Complex with Cobalt Ion in a Water and 2-Propoanol Solvent Mixture

• Salima Al-Seddik Al-Ddarwish

  Departmenof Chemistry t, Faculty of Science, Misurata University, Libya

  Author

• Khaled M. Elsherif

  Libyan Authority for Scientific Research, Tripoli, Libya

  Author

  https://orcid.org/0000-0002-3884-1804

• Ahmed Zubi

  Departmenof Chemistry t, Faculty of Science, Misurata University, Libya

  Author

• Zainab Y. Alzalouk

  Departmenof Chemistry t, Faculty of Science, Misurata University, Libya

  Author

• Rafallah M. Atiya

  Departmenof Chemistry t, Faculty of Science, Misurata University, Libya

  Author

This study shows the use of a murexide indicator as a ligand for spectral estimation of Co (II). Murexide is a metallochromic indicator that has a 520nm wavelength absorption peak, and with its bond to cobalt binary ion, this peak shifts to a wavelength of 475 nm. Murexide complexes are poorly stable in aqueous solutions. The effect of using different ratios of (2-propanol: water) mixtures on the absorption spectrum of murexide as well as its complexes with the studied metal ion was investigated. The effect of some factors on the stability of the formed complex, such as time and pH, were studied at different solvent ratios and gradients in polarity of 2-propanol and water, which were: (2:8), (4:6), and (7:3). The stoichiometry, stability constant, and molar absorptivity were estimated using the continuous variations method for the murexide complex with Co (II) at the previous ratios and the results were as follows: 2:1, 1X10¹³, 7664 L.mol^-1.cm^-1, 1:1, 1X10⁶, 1938 L.mol^-1.cm^-1, 2:1, 1X10¹³, 2422 L.mol^-1.cm^-1 for the ratios (2:8), (4:6), and (7:3), respectively. The spectral method for estimating the cobalt ion was evaluated at the ratio (7:3), by estimating the sensitivity, detection limits, quantification limits, and the linear range of the Pierre-Lambert law, where the obtained results were: 0.0948 ppm^-1, 0.0831 ppm, 0.277 ppm, 0.2-4 ppm, respectively. The effect of various concentrations of some interfering ions on the accuracy of the proposed spectroscopic method was also studied, and it was found that it decreases at high concentrations of these ions.

Elsherif, K., Hadidan, Q., & Alkariwi, K. (2022). Spectrophotometric determination of Zn (II) and Cu (II) in analytical sample using murexide reagent. Prog. Chem. Biochem. Res, 5(3), 229-238.

Elsherif, K., Zubi, A., Najar, A., & Ghashir, H. B. (2021). Complexation of Pyrazole Based Ligands with Ag (I): Spectrophotometric Studies in Mixed Solvent (EtOH-H2O). Arabian Journal of Chemical and Environmental Research, 8(2), 236-246.

Elsherif, K. M., Alzalouk, Z., Zubi, A., & Al-Ddarwish, S. (2023). Metal Chelates of Copper and Nickel with Murexide in Mixed Isopropanol: Water Solvent: Spectrophotometric Study. Scientific Journal for Faculty of Science-Sirte University, 3(1), 9-17.

Elsherif, K. M., Zubi, A., Najar, A., & Ghashir, H. B. (2022). Determination of Stoichiometry and Stability Constant of Cd (II) and Zn (II) Complexes with Pyrazole Based Ligands in Mixed Solvent (EtOH-H2O). Journal of Pure & Applied Sciences, 21(2), 128-134.

Elsherif, K. M., Zubi, A., Shawish, H. B., Abajja, S. A., & Almelah, E. B. (2020). Complex Formation of Bis (salicylidene) ethylenediamine (Salen type ligand) with Cupper (II) Ions in Different Solvents: Spectrophotometric and Conductometric Study. International Journal of New Chemistry, 7(1), 1-13.

Erkey, C. (2011). Supercritical fluids and organometallic compounds: from recovery of trace metals to synthesis of nanostructured materials. Elsevier.

Gordon, H., & Norwitz, G. (1972). Spectrophotometric determination of calcium in zirconium powder by use of murexide. Talanta, 19(1), 1-6.

Hassine, C. B. A., & Barhoumi, H. (2018). Electrochemical study of a glassy carbon electrode modified by poly-4-nitroaniline-reduced/murexide and its sensitivity for metal ions. Analytical biochemistry, 560, 30-38.

Job, P. (1928). Formation and stability of inorganic complexes in solution. Ann. chim, 9(10), 113-134.

Knoche, W., & Rees, N. H. (1984). The kinetics and mechanism of the decomposition of murexide in acid solution. Journal of Chemical education, 61(8), 724.

Kyrš, M., & Sklucký, P. (1967). Indirect determination of caesium by compleximetric titration of calcium after extraction with calcium dipicrylaminate in nitrobenzene. Analytica Chimica Acta, 38, 460-463.

Mohran, H. S. (2009). An electrochemical investigation of the redox properties of murexide in aqueous and non-aqueous media. American Journal of Applied Sciences, 6(5), 964.

Raafid, E., Al-Da’amy, M. A., & Kadhim, S. H. (2020). Spectrophotometric determination of Cu (II) in analytical sample using a new chromogenic reagent (HPEDN). Indonesian Journal of Chemistry, 20(5), 1080-1091.

Ramaiah, N., Gupta, S., & Vishnu. (1956). Spectrophotometry Studies on the Kinetics of the Decomposition of Murexide in Acid Solutions: Effect of Concentration. Zeitschrift für Physikalische Chemie, 206(1), 254-260.

Ravichandran, R., Rajendran, M., & Devapiriam, D. (2014). Antioxidant study of quercetin and their metal complex and determination of stability constant by spectrophotometry method. Food chemistry, 146, 472-478.

Rezayi, M., Ahmadzadeh, S., Kassim, A., & Heng, L. Y. (2011). Thermodynamic studies of complex formation between Co (Salen) ionophore with chromate (II) ions in AN-H2O binary solutions by the conductometric method. Int. J. Electrochem. Sci, 6, 6350-6359.

Rounaghi, G., Sarafraz Yazdi, A., & Monsef, Z. (2002). A Polarographic Study of Tl+, Pb 2 and Cd 2+ Complexes with Dicyclohexano-18-Crown-6 in Some Binary Mixed Solvents. Journal of inclusion phenomena and macrocyclic chemistry, 43, 231-237.

Ryan, D. K., & Weber, J. H. (1982). Fluorescence quenching titration for determination of complexing capacities and stability constants of fulvic acid. Analytical Chemistry, 54(6), 986-990.

Shamsipur, M., & Alizadeh, N. (1992). Spectrophotometric study of cobalt, nickel, copper, zinc, cadmium and lead complexes with murexide in dimethylsulphoxide solution. Talanta, 39(9), 1209-1212.

Shivanand, S. (2014). Metal-ligand stability constants of Fe (III), Cd (II), Co (II), Ni (II), Zn (II) metal ion complexes with Lorazepam in aquo-organic media at 0.1 M ionic strength pH metrically. Adv In Appl Sci Res, 5(4), 171-175.

Wahba, O., Hassan, A. M., Naser, A., & Hanafi, A. (2017). Preparation and spectroscopic studies of some copper and nickel Schiff base complexes and their applications as colouring pigments in protective paints industry. Egyptian Journal of Chemistry, 60(1), 25-40.

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