Determination of zinc complexation with an immobilized reagent for the analysis of environmental objects

Although significant progress has been made in the effective measurement of Zn(II), Аlizarin red S (ARS) was immobilized on polyethylene polyamine-modified polyacrylonitrile (PPF-1) via a new matrix. This approach allows the detection of low levels of Zn(II) ions in various water samples via preconcentrated atomic absorption spectrometry. The use of PPF-1 in a polymer matrix for zinc preconcentration presents several advantages over traditional sorbtion-spectroscopic methods, including reduced cost, high zinc recovery, increased sensitivity, and selectivity. The maximum sensitivity of Zn(II) determination using selectively immobilized ARS was 522 nm. The optimal pH for Zn(II) detection at ambient temperature was found to be 5.0. The adsorption rate was approximately, with a linear detection range of 6.5-40 mg × L^-1 and a detection limit of 0.6 mg × L^-1 The immobilized ARS polymer matrix demonstrated selective Zn(II) determination even in the presence of solutions of Na⁺, K⁺, Ca²⁺, Mg²⁺, Ba²⁺, SO₄^2-, CO₃^2-, HCO₃^- and Cl^-. The Zn(II) concentrations in various water samples were measured with high precision, revealing an adsorption efficiency of 98-99 % when the ARS/PPF-1 matrix was used. This method was developed for the determination of Zn(II) ions in technogenic, waste, and industrial fluids via sorption spectroscopy.