中药变色是由于中药本身所含的成分不稳定 ,加上贮藏、保管不当 ,在酶或其它因素的作用下 ,使某些成分发生氧化、聚合作用或经过分解、缩合作用 ,产生有色化合物 ,使原有的色泽加深或改变 ,以致变质。这种现象称为中药的变色。一般认为 ,中药变色通常与温度、湿度、空气中氧作 The discoloration of traditional Chinese medicine is due to the instability of the components contained in the traditional Chinese medicine, as well as improper storage and storage. Under the action of enzymes or other factors, certain components are oxidized, polymerized or decomposed and reduced to produce colored compounds. The original color is deepened or changed so that it deteriorates. This phenomenon is called discoloration of Chinese medicine. It is generally believed that the discoloration of traditional Chinese medicine is usually related to temperature, humidity, and oxygen in the air.