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氢醌系一种具有还原性的有机毒品化合物。其霜剂临床广泛用于治疗皮肤黑斑、黄褐斑或雀斑,是一种有效药物。根据本品的乙醇溶液在波长225±1nm处有最大吸收峰,拟定紫外分光光度法测定其含量,结果满意,现报告如下。一、仪器与药品1.53w紫外可见分光光度计(上海光学仪器厂)。2.95％乙醇(AR)。3.氢醌霜处方:氢醌 3.0g 无水亚硫酸钠 1.0g薄荷脑1.0g 基质加至100.0g4.氢醌标准液制备.准确称取105℃干燥3h的氢醌(分析纯,上海化学试剂分装
Hydroquinone is a reducing organic compound. Its cream is widely used clinically to treat skin dark spots, melasma or freckles and is an effective drug. According to the product of ethanol at a wavelength of 225 ± 1nm maximum absorption peak, the proposed UV spectrophotometry determination of its content, the results are satisfactory, are as follows. First, instruments and medicines 1.53w UV visible spectrophotometer (Shanghai Optical Instrument Factory). 2.95% ethanol (AR). 3. Hydroquinone cream prescription: hydroquinone 3.0g anhydrous sodium sulfite 1.0g menthol 1.0g substrate added to 100.0g4. Hydroquinone standard solution Preparation accurately weighed 105 ℃ dried 3h hydroquinone (analytical grade, Shanghai Chemical reagent points Loaded