KINETIC-SPECTROPHOTOMETRICDETERMINATION OF pBROMOANILINEAT THE MICROGRAM LEVEL

摘要

The determination of p-Bromoaniline(PBA) was investigated by kinetic-spectrophotometric method followed by the progress of MnII catalyzed reduction of periodate ion in the acetone-water medium. The reaction was found to be first order with respect to the catalyst, substrate,and oxidant each. The reaction was followed by monitoring the increase in the absorbance of the reaction intermediate. The main reaction product characterized on the basis of melting point and spectroscopic studies is 4-methyl-1,2-benzoquinone. The effect of pH, dielectric constant of medium and free radical scavengers were studied to develop the best-fit conditions for developing a new and simple kinetic-spectrophotometric method for microgram determination of p-Bromoanilinein the range 0.52μg/cm3to 48.37μg/cm3.The characteristics of various calibration curves, detection limits, percentage recovery,and effect of interferants, correlation coefficient and comparison of the proposed methods with other reported methods are presented in this article.