Creation of a sorption photometric method for the determination of heavy metal ions

This article focuses on methods for the determination of iron, which have wide application in a number of fields, including traditional classical methods such as spectrophotometry and titrimetry, as well as instrumental methods such as atomic absorption spectrometry and recent advanced methods such as electron probe microanalysis. Photometric methods are widely used for the determination of heavy metals. These methods are significant due to their sensitivity, simplicity, and the minimal time required for analysis. Photometric analysis methods are currently being used in combination with “hybrid” sorption methods. The qualitative reactions of iron ions with the reagent 2-hydroxy-3-nitroso-1-naphthol acid have been studied, and the immobilization properties of the reagent on a specific fiber have been demonstrated. The inherent chemical characteristics of iron impose constraints on its intracellular accumulation. Both Fe(II) and Fe(III) ions are relatively small and exhibit a strong tendency to form octahedral (six-coordinate) complexes with ligands containing donor atoms such as oxygen, nitrogen, and sulfur. This coordination behavior, in combination with the extensive range of redox potentials exhibited by iron-dependent enzymes, underpins iron’s critical function in fundamental biochemical processes, including ribonucleotide reduction, nitrogen fixation, and the energy-transducing electron transport chains of respiration and photosynthesis. A method for determining iron (II, III) ions in water and kaolins has been proposed. The complex formation of iron ions with immobilized HNNA has been studied to develop a solid-phase spectrophotometric method for determining iron in real samples, particularly in water. An analysis of artificial mixtures simulating real samples has been conducted. Optimal conditions for immobilization and complex formation have been determined.

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