中药——鸡掌大黄、唐古特大黄、铁皮大黄根及根茎

[中文适用范围]： 本标准规定了大黄根及根茎（大黄、大黄、大黄、大黄的干燥根及根茎）的质量和安全要求。本标准适用于国际贸易中作为天然药物销售和使用的大黄根及根茎，包括中药材（全药材）和源自这些植物的饮片。本标准不适用于大黄根及根茎的炮制方法及炮制品。 [外文原描述]： This document specifies the quality and safety requirements of Rheum root and rhizome (the dried root and rhizome of Rheum palmatum Linne., Rheum tanguticum Maxim. ex Balf. and Rheum officinale Baill.). This document applies to Rheum root and rhizome that is sold and used as natural medicines in international trade, including Chinese materia medica (whole medicinal materials) and decoction pieces derived from these plants. This document does not apply to the processing methods and processed products of Rheum root and rhizome.