Spectrophotometric determination of hexamethylenetetramine (HMT) in pharmaceutical preparations using chromotropic acid and microwave oven

Química Nova

Pezza, Leonardo¹  Fagnani, Enelton¹  Universidade Estadual Paulista, Araraquara, Brasil¹  Pezza, Helena Redigolo¹  Universidade Estadual de Campinas, Campinas, Brasil¹ 

关键词: hexamethylenetetramine;    chromotropic acid;    microwave oven.;   

DOI  :  10.1590/S0100-40422009000900039

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This paper proposes a methodology for spectrophotometric determination of hexamethylenetetramine (HMT) by using chromotropic acid in a phosphoric acid media employing a domestic microwave oven as a source of heating. The reddish-purple soluble product is quantitatively formed after 30 s of irradiation and obeys the Beer´s law in the range between 0.1-1.2 mg L-1 HMT (r = 0.99925). The method was applied successfully in commercial pharmaceutical preparations containing dyes in their composition. The results showed that the method proposed is feasible for simplicity, speed, low cost, precision and accuracy when compared with United States Pharmacopeia official method.

【 授权许可】

Unknown