SPECTROPHOTOMETRIC RESEARCH INTO COMPLEXATION OF TUNGSTEN(VI) WITH o-HYDROXYTHIOPHENOL DERIVATIVES IN THE PRESENCE OF HYDROPHOBIC AMINES

Spectrophotometric methods were used to study the reaction of complexation tungsten with derivatives o-hydroxythiophenol (HTPDs) {2-hydroxy-5-chlorothiophenol (HCTP), 2-hydroxy-5- bromothiophenol (HBTP) and 2-hydroxy-5-iodothiophenol (HITP )} in presence aminophenols. Aminophenols 2(N,N-dimethylaminomethyl)-4-chlorophenol (AP1) 2(N,Ndimethylaminomethyl)-4-bromophenol (AP2), 2(N,N-dimethylaminomethyl) -4-iodophenol (AP3).Optimal conditions for formation extraction mixed ligand complexes (MLC) found, ratios components established. It revealed that MLC are formed a weakly acidic environment (рНopt 4.5-5.5). The maximum light absorption spectrum is observed at λ=460-490 nm. molar coefficient equal ε = (2.0-2.8) × 10 4 . Optimal these compounds concentration (1.2-2.5) 10-3 mol / l GTP (2.0-2.8)×10-3 mol/l AP. optical density reached within 5-8 minutes. Tungsten extracts HTP AP obeys Beer's law concentrations 0.04–3.8 μg/5 ml. proposed method was applied determine steel soils.