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1 仪器和药品紫外分光光度计(岛津UV-260)、天麻(抽检于江西乐平医药公司,来源于同一批,分春、冬麻两种)。2 方法和结果2.1 春麻与冬麻的紫外鉴别(中国药典1985年版一部):取样品粉末(20目)0.2克,各加乙醇10ml,加热回流1小时,滤过,各取滤液0.1克,分别置100ml量瓶中,加乙醇至刻度,摇匀,照分光光度法测定,在210-300克的波长处进行紫外扫描,结果冬麻的最大吸收峰为272±1nm,春麻的最大吸收峰为264±1nm(萦外扫描图略)。
1 Instruments and pharmaceuticals UV spectrophotometer (Shimadzu UV-260), Gastrodia (sampling in Jiangxi Leping Pharmaceutical Company, from the same batch, divided into spring and winter hemp two). 2 Methods and Results 2.1 Ultraviolet identification of jute and hemp (Chinese Pharmacopoeia, 1985 edition): Take 0.2g of sample powder (20 mesh), add 10ml of ethanol, heat to reflux for 1 hour, filter, and take 0.1g of each filtrate , respectively, set the 100ml volumetric flask, add ethanol to the mark, shake, according to spectrophotometric determination, at the wavelength of 210-300 grams of UV scanning, the results of the maximum absorption peak of winter sesame is 272 ± 1nm, the maximum length of spring The absorption peak is 264±1 nm (above scans are omitted).