extraction-photometric method

Investigation of nikel(II) complexing with 2,6-dimerkapto-4-methilphenol and aminophenols

Complexing of nickel(II) with 2,6-dimercapto-4-methylphenol (DMMP) and hydrophobic amines was studied using physicochemical methods. Hydroxyl-containing amines-aminophenols (AP) were used as a hydrophobic amine. On the part of aminophenols, 2 (N, N-dimethylaminomethyl) -4-methylphenol (AP1 ), 2 (N, N-dimethylaminomethyl)-4-chlorophenol (AP2 ), and 2 (N, N-dimethylaminomethyl) -4-bromophenol (AP3 ) were used. Mixed-ligand complexes were formed in a weakly acidic medium (pHopt 4.6–6.4).

Extraction-Photometric Determination of Cobalt (II) with Hydroxytiophenols and Hydrophobic Amines

The possibility of using hydroxythiophenols (HTP) for the photometric determination of cobalt (II) has been studied. Aminophenols (AP) were used as hydrophobic amine: 2- (N,N-methylamino methyl)-phenol (AP1) and 2- (N, N-methylaminomethyl) -4-methylphenol (AP2). Dichloroethane, chloroform and carbon tetrachloride turned out to be the best extractants. With a single extraction with chloroform, 97.5–99.5% of cobalt is recovered as a complex. The cobalt (II) complex is extracted into chloroform in the pH range of 3.6–6.3.