“…Several methods have been reported for the determination of the PA. These methods include pharmacopoeial methods 3,4 , titrimetry 5,6 , colorimetry 7,8 , spectrophotometry [9][10][11][12][13][14] , fluorometry 15 and chromatograph [16][17][18] . The survey of literature has shown that no spectrophotometric method was reported so far, for the determination of PA with CDNB.…”