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1 仪器和试剂 U-3010紫外分光光度计。无水乙醇为分析纯,维生素E烟酸酯对照品及维生素E烟酸酯颗粒样品。2 实验条件的选择2.1 测定波长的选择 精密称取维生素E烟酸酯对照品15mg,置100ml量瓶中,加无水乙醇适量使溶解,加无水乙醇稀释至刻度,摇匀,精密量取5ml,置10ml量瓶中,加无水乙醇稀释至刻度,摇匀。取此溶液在200～400nm的波长范围内进行扫描,在264nm的波长处有最大吸收。精密称取按处方配比的辅料细粉适量,按照含量测定的方法溶解,取续滤液在200～
1 instruments and reagents U-3010 UV spectrophotometer. Anhydrous ethanol was of analytical grade, vitamin E nicotinate control and vitamin E nicotinate pellet samples. 2 The choice of experimental conditions 2.1 Determination of wavelength selection Weigh accurately vitamin E nicotinate reference substance 15mg, set 100ml volumetric flask, add ethanol to dissolve, add anhydrous ethanol to the mark, shake, the precise amount of 5ml, set 10ml volumetric flask, add anhydrous ethanol to the mark, shake well. Take this solution in the wavelength range of 200 ~ 400nm scanning, the maximum absorption at a wavelength of 264nm. Accurately weighed according to prescription ratio of the amount of fine powder accessories, in accordance with the method of determination of content dissolved, take the filtrate at 200 ~