Spectrophotometric determination of H2-receptor antagonists via their oxidation with cerium(IV)
作者:Ibrahim A. Darwish、Samiha A. Hussein、Ashraf M. Mahmoud、Ahmed I. Hassan
DOI:10.1016/j.saa.2007.03.005
日期:2008.1
A simple, accurate and sensitive spectrophotometric method has been developed and validated for determination of H(2)-receptor antagonists: cimetidine, famotidine, nizatidine and ranitidine hydrochloride. The method was based on the oxidation of these drugs with cerium(IV) in presence of perchloric acid and subsequent measurement of the excess Ce(IV) by its reaction with p-dimethylaminobenzaldehyde
一种简单,准确,灵敏的分光光度法已开发和验证用于确定H(2)受体拮抗剂:西咪替丁,法莫替丁,尼扎替丁和盐酸雷尼替丁。该方法的基础是在高氯酸存在下用铈(IV)氧化这些药物,然后通过与过量的铈(IV)与对二甲基氨基苯甲醛反应生成红色产物(在464nm处具有λ),来测量过量的铈(IV)。 )。由于药物的存在,有色产品(DeltaA)吸收强度的降低与其在样品溶液中的浓度相关。仔细研究和优化了影响反应的不同变量。在最佳条件下,线性关系具有良好的相关系数(0.9990-0。在DeltaA值和浓度范围为1-20microgml(-1)的药物之间发现了9994)。检测和定量的分析极限分别为0.18-0.60和0.54-1.53microgml(-1)。该方法在准确性,准确性,坚固性和鲁棒性方面得到了验证;结果令人满意。所提出的方法已成功应用于纯药物和药物剂型中药物的测定(回收率为98.3-102.6 +/-