A cost-efficient synergistic behavior liquid-liquid extraction and spectrophotometric determination of silver(I) coupled with N'',N'''-bis[(E)-(4-fluorophenyl)methylidene] thiocarbonohydrazide: An industrial approach of analysis of real environmental samples

Abstract

Abstract Intention of our work is to develop cost-efficient, instant, sensitive and synergistic liquid-liquid extraction and spectrophotometric method for determination of silver(I) coupled with N'',N'''-bis[(E)-(4-fluorophenyl)methylidene] thiocarbonohydrazide i.e. bis-(4-fluoroPM)TCH and pyridine. The reagent (bis-(4-fluoroPM)TCH) and synergent pyridine instantly forms stable faint yellow colored complex with silver(I) at room temperature having composition 1:2:2 (M:L:Py) and quantitatively extracted into iso amyl acetate at pH 5.0. The extracted species exhibits absorption maximum at 375 nm against reagent blank. Experimental conditions were optimized and Beer’s law was observed in the concentration range of 1.0 to 7.0 µg mL− 1 of silver(I) and optimum concentration range obtained from Ringbom’s plot was found to be 2–6 µg mL− 1. The composition of silver(I)–bis-(4-fluoroPM)TCH–pyridine adduct was established by slope ratio, molar ratio & Jobs method. Molar absorptivity and Sandell’s sensitivity value of silver(I) chelate were 1.08 x104 lit/mol cm and 0.001µg/cm2 respectively. Selectivity of method was enhanced by use of suitable masking agents. Method has been successfully applied for determination of silver(I) in thin films, nano powders, hypo solutions, photographic wastes, X ray washings, pharmaceuticals, and synthetic mixtures. Accuracy of method was judged by using AAS which tested the validity of method.