Separation and Spectrophotometric Determination of Iron (III) and Mercury (II) via Cloud Point Extraction with New AzoDerivative

Abstract

A new coupled cloud point extraction (CPE) was developed as prompt, easy and
economical preconcentration technique for spectrophotometric determination of tiny
amounts of Fe3+ and Hg2+ in real samples. A modern thiazolylazo ligand [methyl phenyl
thiazolyl azo]-3-methyl-4-methoxy-2-naphthol (MPTAN) was done for the CPE method
in the preconcentration of Fe3+ and Hg2+ as an earlier step to its characterization by
UV-VIS spectrophotometry. The analytical manner includes the formation of under
study metals complex with new ligand and quantitatively extracted to the Cloud point
layer (CPL) of TritonX-100 after heating. The concentration of MPTAN, metals, pH,
thermodynamic data and volume of surfactant was optimized. The investigation of
stoichiometry has the ratio of metal to ligand of 1:1. Under finest settings and
conditions, the calibration curve was found to be linear in the concentration range of
two ions (0.05-10) ppm and the limit of detection for Fe3+ and Hg2+ are (0.016 and
0.041) ppm respectively. The suggested CPE has an excellent methodology for
characterization of trace metal ions in surrounding samples with a complex matrix as
in soils, water, vegetable, meats, and fruits.