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1 样品来源 样品来自亳州市场。对照药材由卫生部鉴定所提供。2 试剂、试药 硝酸银标准液,由北京市药品检验所提供。其余试剂均为分析纯,自配制。3 样品鉴定3.1 外观性状鉴别,呈筒状或槽状及不规则片状,长短不一,外表面呈棕黄色,粗糙有不规则纵裂纹,呈鳞片状可剥离。内表面灰黄色,较平坦,有细纵纹,体轻易折断,断面不平坦,外层棕黄色疏松,内层灰白色,气微、味微甘苦,而咸。3.2 显微鉴别 粉末为米黄色。水合氯醛装片,可见草酸钙砂晶散在或存在于薄壁细胞中,呈箭头状。有的薄壁细胞充满砂
1 Sample source The sample comes from the market in Zhangzhou. The reference drug was provided by the Ministry of Health. 2 reagents, reagents Silver nitrate standard solution, provided by the Beijing Institute of Drug Control. The remaining reagents were of analytical grade and were prepared. 3 Sample identification 3.1 Appearance trait identification, was cylindrical or trough-like and irregular flaky, different lengths, the outer surface was brown, rough irregular longitudinal cracks, scales can be stripped. The inner surface is grayish yellow, relatively flat, with fine vertical stripes, and the body is easily broken. The section is not flat. The outer layer is loose brown and yellow, and the inner layer is grayish white. The gas is slightly, the taste is slightly bitter, and the salt is salty. 3.2 Microscopic identification The powder is beige. In hydrated chloral loadings, calcium oxalate crystals are scattered or present in parenchyma cells and appear as arrows. Some parenchyma cells are filled with sand