Objective: To develop an HPLC method for simultaneously determining the content and its related substances of iloperidone for quality control. Methods: The method was performed on a Welchrom-C18column(150 mm ×4. 6 mm,5 μm) with 0. 02 mL·min- 1potassium dihydrogen phosphate( adjust pH to 7. 0 by KOH)-acetonitrile(50∶ 50) as the mobile phase. The flow rate was 1. 0 mL·min- 1. The detection wavelength was 228 nm, and the column temperature was at 30 ℃. Results: Iloperidone was completely separated from the rel...