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青叶胆的药典标准与本草考证

ว 2026-09-09 23:07:34ที่ 药典与本草เ 中国国际医疗服务系统
青叶胆,出自《云南中草药》,拼音名Qīng Yè Dǎn,英文名HERBA SWERTIAE MILEENSIS,别名青叶丹、青鱼胆、走胆药、肝炎草。中国药典标准:本品为龙胆科植物青叶胆Swertia mileensis T. N. Ho et W. L. Shih的干燥全草。秋季花果期采收,除去泥沙,晒干。性状:本品长15~45cm。根长圆锥形,长2~7cm,直径约0.2cm,有的有分枝;表面黄色或黄棕色。茎四棱形,棱角具极狭的翅,直径0.1~0.2cm;表面黄绿色或黄棕色,下部常显红紫色,断面中空。叶对生,无柄;叶片多皱缩或破碎,完整者展平后呈条形或狭披针形,长1~4cm,宽0.2~0.7cm。圆锥状聚伞花序,萼片4,条形,黄绿色;花冠4,深裂,黄色,裂片卵状披针形,内侧基部具2腺窝;雄蕊4。蒴果狭卵形,种子多数,细小,棕褐色。气微,味苦。鉴别:本品粉末绿色或黄绿色。石细胞类圆形、类长方形、长条形或长梭形,有的有突起或一端延长,长100~120μm,直径40~50μm,木化,壁厚5~10μm,孔沟明显。纤维长梭形,长180~220μm,直径8~10μm,木化,壁厚约1.5μm,孔沟明显。叶的上表皮细胞壁波状;下表皮细胞角质纹理不甚明显,气孔多数,不等式或不定式。草酸钙结晶呈杆状、针状或片状,多存在于叶肉细胞中。花粉粒圆形,直径30~37μm,具3孔沟,表面有细网状纹理。含量测定:照高效液相色谱法测定。以十八烷基硅烷键合硅胶为填充剂;以甲醇-0.05%磷酸溶液(22:78)为流动相;检测波长为237nm。理论板数按獐牙菜苦苷峰计算应不低于5000。本品按干燥品计算,含獐牙菜苦苷(C16H22O10)不得少于8.0%。性味:苦、甘,寒。归肝、胆、膀胱经。功效:清肝利胆,清热利湿。用于肝胆湿热,黄疸尿赤,胆胀胁痛,热淋涩痛。用法用量:10~15g。注意:虚寒者慎服。储藏:置阴凉干燥处。中华本草记载:青叶胆全草含齐墩果酸、日本当药素、当药素、五种呫吨酮成分、当药甙、红白金花内酯、青叶胆内酯、当药苦甙、2′-O-乙酰基当药苦甙等。能显著降低大白鼠四氯化碳中毒性肝炎引起的血清谷丙转氨酶升高,对肝细胞有保护作用。
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