New conception about the processing of Indigo Naturals / 中成药

AIM: To study the processing of Indigo Naturals. METHODS: Study on the microstructure of Indigo Naturals with scanning electron microscope (SEM) and X ray diffractometer (XRD) were carried out. RESULTS: Through the SEM, it is clear that Indigo attached to the surface of some white substance, and the XRD proves that the white substance in Indigo Naturals is calcium carbonate (CaCO 3). CONCLUSION: The study about the processing of Indigo Naturals indicates that Indigo Naturals consists of Indigo and other effective compositions attached the surface of calcium carbonate (CaCO 3).