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抗菌增效剂甲氧苄氨嘧啶(TMP)在中国药典1977版与BP 1980版、USPX X版均已收载。含量测定均采用非水滴定法。我们试用“吸收度比值法”,取得了满意的结果。 1967年田村等作为“差示定量”方法的一种,对磺酞、酞类、偶氮等三个系统的单色,双色指示剂在不同pH值下,对特定波长的吸收度进行研究,提出用pH指示剂在两个特定波长下的吸收度比值法(简称“吸收度
Antibacterial synergist Trimethoprim (TMP) in the Chinese Pharmacopoeia 1977 version and BP 1980 version, USPX X version have been contained. Determination of the content of non-aqueous titration method. We tried the “absorption ratio method” and achieved satisfactory results. In 1967, Tamura and others were used as a method of “differential quantification” to study the absorption of specific wavelengths of monochromatic and bicolor indicators of three systems of sulfophthalide, phthalide and azo, at different pH values. Proposed with the pH indicator at two specific wavelengths of the absorption ratio method (referred to as "absorption