The levels of R and Smephenytoin in human urine were determined by chiral capillary gas chromatography with nitrogenphosphorus detector. The conditions of the chromatography and detection included a chiral capillary column (ChirasilVal, 25m×025mm id, Alltech), column temperature (T) 190℃, injector T 220℃,detector T 240℃, and the flowrates of 0.85, 3.5 and 120 mL/min for nitrogen, hydrogen and air respectively. Based on the above conditions, the satisfactory separation of R and Smephenytoin...