The use of dipron coupling reagent in the spectrophotometric determination of aniline in presence of Sodium metaperiodate in aqueous solution

ABSTRACT A simple rapid and specific method was developed for the determination of aniline .The method depends on the organic oxidative coupling reaction of dipyrone (metamizole sodium) with aniline in the presence of sodium metaperiodate in aqueous solution to form purple product measured at 530 nm. Beer's law is obeyed in the concentration range 0.04-8 gml with accuracy (average recovery) of 99.94% and precision (RSD) is less than 2.5% .The molar absorptivity is 20312 l.mol .cm with LOD 0.012 g.ml and LOQ 0.038 g.ml .The method has been successfully applied to determine aniline .