SYNERGIC EXTRACTION OF LEAD WITH 2-THENOYLTRIFLUOROACETONE AND TRIBENZYLAMINE BY ATOMIC-ABSORPTION SPECTROPHOTOMETRY

Synergic extraction studies of lead with HTTA-TBA in chloroform is carried out employing atomic absorption spectrometry. Quantitative extraction is observed at pH 3.0, ionic strength 0.1M(H+, ClO4) with an equimolar concentration of 0.5M for both extractants. The stoichiometry of the adducts and reaction mechanism have been suggested at different pH conditions. Equilibrium constants (log K2,0 and log K2,1) are found to be -7.27 and -4.12 respectively and the stability constant (log-beta-2,1) is 3.15 at pH 3.