8PAN Xian(潘贤).The New Edition Medical Practical Encyclopedia (新编药物实用全书).Beijing(北京):China Traditional Chinese Medical Press(中国中医药出版社),1998.184
9Hisham E Abdellatef. Kinetic spectrophotometric determination of tramadol hydrochloride in pharmaceutical formulation. J Pharm Biomed Anal ,2002,29:835
10Aysel Kucuk, Yucel Kad,oglu. Determination of trramadol hydrochloride in ampoule dosage forms by using UV spectrophotometric and HPLC - DAD methods in methanol and water media. Ⅱ Farmaco, 2005,60:163
