Creation of a Sorption Photometric Method for the Determination of Heavy Metal Ions

This study presents the development of a sorption photometric method for the determination of heavy metal ions, specifically focusing on iron (Fe²⁺ and Fe³⁺). Heavy metals like lead, mercury, cadmium, and arsenic pose significant health risks due to their toxicity and non-biodegradability. The research explores the complex formation of iron ions with the reagent 2-hydroxy-3-nitroso-1-naphthol acid (HNNA) immobilized on ion-exchange fibers, demonstrating its high sensitivity and selectivity. A series of experiments were conducted to optimize immobilization and complex formation conditions, leading to improved analytical signals. The method's efficacy was validated through spectrophotometric analyses, comparing results with traditional techniques. The findings indicate a strong correlation between the immobilized reagent and iron ions, with distinct colorimetric responses observed in the specific pH range of 4 to 6. Moreover, the developed method exhibits advantages such as reduced interference, rapid analysis, and stability under varying conditions. Overall, the sorption photometric method shows promise not only for the accurate determination of iron but also for broader applications in monitoring heavy metal contamination in environmental samples. This work contributes to advancements in analytical chemistry and public health by addressing critical issues related to heavy metal pollution.