Actual problems of modern science, education and training

Conclusion. The Pb (II) ion, which is considered one of the heavy metals, was used for sorption-spectroscopic detection using the amido black 10B organic reagent immobilized on the fiber. The structure of the metal complex was determined by the following physicochemical methods: FT / IR, UV-Vis spectroscopy. UV-Vis spectra of the ligand and the complex confirmed the formation of a 1:1 complex with Pb (II), which has high nitrogen stability. The sorption-spectroscopic method for the determination of lead (II) ion in primary, secondary and complex mixtures of artificial
mixtures was tested. The relative standard deviation (Sr) does not exceed 0.016, which proves the accuracy and reproducibility of the developed method.

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