Use of 3-Hydroxy-m-Toylol-1-o-Chlorophenyltriazene in the Spectrophotometric Determination of Copper(II)

Abstract

The title reagent has been used for spectrophotometric

determination of Cu(II). The composition of yellow coloured

complex has been found to be 1 : 2 (Cu : R) with absorption

maximum at 390 nm in the pH range 6.6-7.2. Absorbance measurements

were made at 400 nm. Beer's law was followed in the

studied concentration range 2.0 x 10^–5 M to 1.0 X 10^–4 M. The

value of molar absorptivity, Sandell's sensitivity, stability constant

(log β) and free energy of formation were found to be

4107 L/mole cm, 15.47 ng/cm², 10.10 and -13.77 kcal/mole respectively.

Interference of twentyfive diverse ions has been examined.