Identification of Fritillaria herbal drugs by X-ray diffraction of starch grains / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>To provide a simple method to identify different of herbal drugs of Fritillaria.</p><p><b>METHOD</b>The X-ray diffraction spectra of five Fritillaria powders were obtained by X-ray diffractometry (XRD).</p><p><b>RESULT</b>By analyzing the diffraction peaks of starch over the 2theta diffraction angle in the range of 10 degrees-30 degrees, we concluded that the crystal type of starch in F. thunbergii, F. ussurensis, F. pallidifloca and F. hupehensis was B-type. However, the crystal type of starch in F. cirrhosa was CB-type. The degree of crystallinity of starch was 42.1%, 43.6%, 37.7%, 35.9% and 30.8%, corresponding to F. thunbergii, F. ussurensis, F. pallidiflcoca,F. cirrhosa and F. hupehensis.</p><p><b>CONCLUSION</b>Based on the differences of crystallinity of starch and X-ray diffraction spectra of Fritillaria powders, different species of Fritillaria can be identified.</p>