Spectroscopic determination of mercury(II) with dimercaptophenols in the presence of hydrophobic amines
نویسندگان
1 Department of Chemistry, Azerbaijan State Pedagogical University, Baku, Azerbaijan
2 Azerbaijan State University of Oil and Industry, Baku, Azerbaijan.
doi
10.22034/crl.2025.530343.1633چکیده
The extraction of mercury (II) ions from solutions of dimercaptophenolates in chloroform in the presence of hydrophobic amines was studied. Optimum conditions for mercury extraction, pH1/2 parameter and composition of extracted complexes are determined. The following dimercaptophenols (DP) are used: 2,6-dimercaptophenol (DMP), 2,6-dimercapto-4-methylphenol (DMP), 2,6-dimercapto-4-propylphenol (DMPP), 2,6-dimercapto-4-isopropylphenol (DMIPP) and 2,6-dimercapto-4-second-butylphenol (DMSBP). Among the hydrophobic amines used were aniline, N-methylaniline and N,N-dimethylaniline. Among the studied amines, N,N-dimethylaniline has the best extraction ability. It is established that ionic associates are formed in a slightly acidic medium (рНоpt 2.9-4.5). Maximums in light absorption spectra are observed at λ=458-472 nm. The molar coefficient of light absorption is equal to ε = (2.82-3.75)∙104. Based on the obtained data, extraction-spectrophotometric methods for determining mercury in beef liver, cheese, beef meat, fish and wheat were developed.
