Spectrophotometric Determination of Tellurium in Various Samples using Salycilidine-2-Aminophenol-4-Sulphonic Acid (SASAC)

Abstract

A rapid, simple and sensitive spectrophotometer method for the determination of traces and ultra-traces of tellurium(IV) were studied. These method were based on using Salycilidine-2-Aminophenol-4-Sulphonic Acid (SASAC) as an analytical reagent The reagent has been synthesized and characterized using IR, 1H NMR. The reagent forms dark yellow colored complex with Te (IV) showing maximum absorbance at 432 nm in borates buffer medium (pH= 8). Beer’s law were obeyed in the concentration range 0.31-20.41 μg mL^-1, having molar absorptivity and Sandal’s sensitivity of 1.43×10⁺⁴ L mol^-1 cm^-1 , and 0.0018 μg cm^-2, respectively. The optimum reaction conditions and other analytical parameters were investigated to enhance the sensitivity of the present method. The tolerance limit of various ions with this method has been studied. The proposed method was applied for the analysis of tellurium in water samples, plant materials and soil samples. The results obtained by the proposed method were superior to the reported method. The performances of proposed methods were evaluated in terms of student’s ‘t’-test and variance ratio ‘f’-test which indicates the significance of proposed methods over reported methods.

Keywords: Tellurium determination, spectrophotometry, (SASAC) . Environmental samples