Analytical Application of 1, 1′-(Sulfonyldibenzene-4,1-diyl)bis(3-hydroxy-3-phenyltriaz-1-en) (BHDPT) in the Spectrophotometric Determination of Iron (III)

Bis hydroxytriazenes (1, 1′-(sulfonyldibenzene-4,1-diyl)bis(3-hydroxy-3-phenyltriaz-1-en)) has been proposed as a sensitive and selective reagent for the spectrophotometric determination of Iron(III). The method is based on the formation of green coloured 1:1 complex by the reaction of Iron (III) with Bis hydroxytriazenes. Beer's law is valid over the concentration range of 1×10⁻⁴ to 4.5×10⁻⁴. The coloured complex exhibit an absorption maximum at 410 nm with molar absorptivity of 45606.2 L mol⁻¹cm⁻¹ and sendell sensitivity of 1.22 ng cm⁻² the absorbance is found to increase linearly with increase in concentration of iron which are corroborated by the calculated correlation coefficient.