Spectrophotometric determination of nickel (II) using 5-(2-bromo-5-methoxybenzylidene)-thiazolidine-2,4-dione

Аннотация

A fast and precise spectrophotometric approach was made to measure nickel (II) using the chromogenic compound 5-(2-bromo-5-methoxybenzylidene)-thiazolidine-2,4-dione (BMBT), which forms a yellow-brown complex when combined with other chemicals. It has been investigated whether bmbt can be used to measure Ni (II) through photometry. In the ph range of 7.1 to 8.9, the nickel (II) complex is roduced. A BMBT concentration of 510-4 mol/l is offered for the optimal complex formation and extraction. Water (as the base medium), methyl alcohol, ethyl alcohol, chloroform, hexane, dichloromethane, and acetonitrile were among the solvents investigated in the study. Methanol performed best among all, making it the most appropriate solvent for the experiment. At 482 nm, the complexation of nickel with bmbt reveals the strongest analytical signal. The bathochromic shift in this instance is 146 nm, which is the shift of the absorption peak to the long wavelength side. 1.75 104 is the molar absorption coefficient. Ni: BMBT = 1:2 is the component ratio in the complex. It is known that the complexing form of nickel, Ni2+, removes one hydrogen atom from a BMBT molecule. The complex's structure was investigated by empoying thermogravimetry and infrared spectroscopy. The research demonstrated that a number of metal ions, containing Fe(III), Cu(II), Mo(VI), Se(IV), Pt(II), Mn(II), Cd(II), Zn(II), Pb(II), and Pd(II), as well as form colored complexes when bmbt is used as a chromogenic reagent. The presence of masking agents or a change in the solution's ph considerably improves the accuracy of nickel measurement in the presence of these metal ions.at nickel concentrations of 0.3–13 g/ml, the fundamental rule of light absorption is observed. By utilizing masking agents, adjusting the medium's pH, or using extraction, the disruptive influence of irrelevant ions is removed. Methods for figuring out the amount of nickel in different things, like bottom deposits, wastewater, and steels, have been created based on the discoveries of a spectrophotometric analysis of the nickel (II) complex with BMBT.