Specificity was demonstrated by the absence of interfering peaks at
the retention times of desloratidine, desloratidine D5, 3-OH
desloratidine and 3-OH desloratidine D4 in all the eight different lots
of extracted blank plasma [Figure-3]. Representative chromatograms
of extracted blank plasma, extracted plasma sample containing
50pg/mL each of desloratidine and 3-OH desloratidine (low
standard) are presented [Figure-4]