Application of A New Spectrophotometric Method Manipulating Ratio Spectra for Determination of Bambuterol Hydrochloride in the Presence of Its Degradation Product Terbutaline

A simple,specific,accurate and precise spectrophotometric stability indicating method is developed for determination of bambuterol hydrochloride(BH)in the presence of its degradation product terbutaline(TERB)and in pharmaceutical formulations.A newly developed spectrophotometric method called ratio difference method by measuring the difference in amplitudes between 245 and 260nm of ratio spectra.The calibration curves are linear over the concentration range of 0.1~1mg·mL-1 for BH and 0.1~0.7mg·mL-1 for TERB with mean percentage recovery of 100.56±0.751 and 99.88±1.183,respectively.The selectivity of the proposed method is checked using laboratory prepared mixtures.The proposed method has been successfully applied to the analysis of BH in pharmaceutical dosage forms without interference from other dosage form additives and the results have been statistically compared with pharmacopeial method.

抗肿瘤药Verubulin hydrochloride

多形性成胶质细胞瘤（GBM）为目前最常见和最具生命威胁的原发性脑肿瘤，其标准疗法为先行外科手术切除，然后进行放疗和替莫唑胺治疗。过去30年中，该疾病的5年生存率不及3％，即使通过外科手术完全切除肿瘤，并辅以最佳治疗手段，患者的长期生存率仍很低。黑素瘤为分布于皮肤表面的一种肿瘤，其患者中约有1／2可能会发生肿瘤脑部转移，而针对转移性黑素瘤，可供选择的治疗方案十分有限，因为大多数抗肿瘤药不能穿透血脑屏障。