“…Column, 50 mm × 4.6 mm; mobile phase, Tris-HCl buffer (pH 7.4) containing 0.05 M NaCl; flow rate, 1 ml/min; solutes: (1) mannitol, (2) acyclovir, (3) ranitidine, (4) atenolol, (5) cimetidine, (6) theophylline, (7) acetaminophen, (8) antipyrine, (9) cephalexin, (10) timolol,(12) ketoprofen,(13) piroxicam,(14) lidocaine, (16) metoprolol, (17) diazepam,(19) hydrocortisone,(20) phenytoin,(22) propanolol.…”