عنوان المقالة:With Solvent Extraction Method, and via new Organic Reagent 2-(Benzo thiazolyl azo)-4,5-Diphenyl Imidazole for Spectrophotometric Determination of Copper (II) in different Samples.
The new organic reagent 2-[Benzo thiazolyl azo]-4,5-diphenyl imidazole was
prepared and used as complexing agent for separation and spectrophotometric
determination of Cu2+ ion in some samples include plants, soil, water and human
blood serum. Initially determined all factors effect on extraction method and the
results show optimum pH was (pHex=9), optimum concentration was 40μg/5mLCu2+
and optimum shaking time was (15min.), as well stoichiometry study appears the
complex structure was 1:1 Cu2+: BTADPI. Interferences effect of cations were
studied. Synergism effect shows MIBK gave increasing in distribution ratio (D).
Organic solvent effect appears there is no any linear relation between dielectric
constant for organic solvent used and distribution ration (D). Thermodynamically
found the reaction was Endothermic reaction, with ΔHex= 0.0131 KJ.mole-1,ΔGex=-
54.20 KJ.mole-1 ,ΔSex= 167.84 J.mole-1.Beer’s law was obeyed over the concentration
1-30μg/5mL, and ε=922.90 Lmol-1.cm-1,with detection limit 1.7×10-5and Sandell’s
sensitivity 6.8× 10-7 gcm-2.
م.د.صفا مجيد | Dr.Safa Majeed | 4955