Abstract

This study investigates the sorption-spectroscopic method as a contemporary hybrid technique for the quantification of heavy and toxic metals. The research focuses on the immobilization of nitroso-R salt onto solid supports. Optimal conditions for the immobilization of nitroso-R salt on synthetic PPA fiber were established, and the influences of pH and fiber capacity were evaluated. Molar absorptivity coefficients of the colorimetric reactions were determined. Additionally, dissociation constants of nitroso-R salt were calculated colorimetrically at an ionic strength of 0.1-0.5 M and compared with literature data.

Keywords:Colorimetry; Spectrophotometer; Molar absorption coefficient; Immobilization; PPA fiber; Nitroso-R