scholarly journals FORMULA ESTABLISHMENT OF COLORLESS Pb(II) COMPLEX WITH N-BENZOYL-N-PHENYL HYDROXYLAMINE (BPA) USING ATOMIC ABSORPTION SPECTROSCOPY

2012 ◽  
Vol 12 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Dhananjay B Sarode ◽  
Sopan T Ingle ◽  
Sanjay B Attarde
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Variation Method ◽  
Ratio Method ◽  
Slope Ratio ◽  
Mole Ratio Method ◽  
Continuous Variation Method ◽  
Slope Ratio Method

A new method for determination of stoichiometry of colorless complexes by using atomic absorption spectrophotometric technique in continuous variation method and slope ratio method was described here. This method can be used in same manner as that of mole ratio method and slope ratio method. In this method atomic absorption spectroscopy was used instead of UV-Vis spectrophotometry. Atomic absorption spectrophotometric technique is superior to UV-Vis spectrophotometry as it can be applied to colorless soluble complexes. Pb(II) and n-benzoyl-n-phenyl hydroxylamine react to form colorless complex at pH 6.5, which can be easily determined by this method. It was found that Pb(II) forms 1:2 complex with n-benzoyl-n-phenyl hydroxylamine and is quantitatively extracted back to aqueous solution for AAS analysis.

Solvent Extraction and Spectrophotometric Determination of Uranium (VI) Using 2,2′-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) as an Analytical Reagent

2013 ◽  
Vol 12 ◽  
pp. 125-133 ◽  
Author(s):  
Sebastian Satya ◽  
Pravin U. Singare ◽  
R.S. Lokhande
Keyword(s):  
Molar Absorptivity ◽  
Variation Method ◽  
Ratio Method ◽  
Slope Ratio ◽  
Masking Agents ◽  
Mole Ratio Method ◽  
Intense Absorption ◽  
Analytical Reagent ◽  
Slope Ratio Method

2,2'-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) is synthesized in the laboratoryand characterized by NMR, IR and elemental analysis for its purity. This reagent forms a yellowcomplex with U(VI) which can be quantitatively extracted into chloroform at pH 10. This complex inchloroform shows an intense absorption peak at 413.0 nm. It is observed that Beer’s law is obeyed inthe range of 2.0-10.0 ppm of metal solution. It gives a linear and reproducible graph under appropriateconditions, the complex having a molar absorptivity of 3.69 x 104 L mol-1·cm-1. Sandell’s sensitivitycalculated was found to be 4.4 x 10-3μg·cm-2. Nature of the extracted complex, determined by Job’scontinuous variation method, Slope ratio method and Mole ratio method shows that the compositionof U(VI) : BSOPD complex is 1:4. Interference by various ions is studied and masking agents usedwhere required. The proposed method has been applied for the determination of U(VI) in monazite sand and synthetic samples. The results of the analysis are found to be comparable with those obtained by standard method.

Sign in / Sign up

Export Citation Format

Share Document