تعيين أيون الرصاص الثنائي طيفيا باستخدام الكاشف العضوي2-[(6-ميثوكسي-2-بنزوثينازوليل] -4-بنزايل فينول

Abstract EN

The study including the determination of pb(II) by using azo reagent 2-[ ( 6-Methoxy -2- benzothiazolyl ) azo ]-4- benzylphenol [ ( 6-MBTABP ) ] spectrophotomtric .The effect of different parameters on determination are evaluated .The study showed that best pH = (7±0.1).The study including obey concentration of Lambert –Beer's law to determination of thecalibration graph of pb ( II ) by azo reagent .From this graph we note obey the concentrationof law was between ( 10 -80 ) μg of pb ( II ) after this values the absorbance increased .Thestoichiometry of complex Lead ion determination by mole ratio method.

Results indicatedreagent to metal ratio was ( 2 : 1 ) the stability constant of the complex determination throughmole ratio method and its value indicated good stability.

The UV-Vis spectra of the reagent and complex determination .The results indicated the max absorbance of complex in ethanol at ( max = 616 nm ), but to the reagent at ( max = 471 nm ) .The IR spectra of the reagent and complex were determination and the melting points of complex and reagent were measured too.

From all studies proposed structural formula of pb(II) complex