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青黛用于中医外科作清凉、消炎药物。制造青黛的原料为含有靛甙成分的植物,此类植物在加水分解后可得一分子β-羟氮杂茚及一分子葡萄糖。青蓝色成分靛蓝系由二分子α-羟氮杂茚氧化而成。因青黛含有靛蓝成分,一般以靛蓝含量的高低作为控制青黛质量的标准。靛蓝含量测定方法较多,但操作都较复杂。过去采用磺化法测定靛蓝含量,结合外观物理性状以检定青黛质量的优劣。但磺化法终点不明显不易掌握,误差很大。为此,我们对青黛中靛蓝含量的测定方法进行了研究改
Qingyi is used in Chinese medicine surgery for cool, anti-inflammatory drugs. The raw material for the manufacture of barley is a plant containing barium components. After hydrolysis, such plants can obtain a molecule of β-hydroxyazepine and a molecule of glucose. The blue-blue component Indigo is formed by the oxidation of two alpha-hydroxyazepines. Because the indigo contains indigo, the indigo content is generally used as the standard for controlling the quality of indigo. There are many methods to determine the content of indigo, but the operation is more complicated. In the past, the content of indigo was determined by sulfonation method, and the appearance and physical properties were combined to determine the quality of indigo. However, the endpoint of the sulfonation method is not obviously difficult to grasp, and the error is large. For this purpose, we have carried out research on the determination of indigo content in the indigo.