本文采用药典法、电位滴定法、直接滴定法及酸性染料比色法分别测定麻黄生品及炒黄、蜜炙2种炮制品中的总生物碱含量。结果表明,麻黄经炮制后生物碱含量降低,其中以炒黄降低最多,蜜炙法次之。采用酸性染料比色法测定上述三种麻黄样品中总生物碱,具有简便、快速、重现性好等优点。 In this study, the total alkaloids contents in raw products of ephedra, fried yellow and preserved fruits were determined by pharmacopoeia method, potentiometric titration, direct titration and acid dye colorimetry. The results showed that the content of alkaloids was reduced after the processing of ephedra, and the fried yellow was the most reduced, followed by the candied fruit method. The use of acid dye colorimetry to determine the total alkaloids in the above three ephedra samples has the advantages of simplicity, rapidity, and good reproducibility.