对半夏药材采用超声提取,依据酸性染料比色法的原理,以λmax=416 nm进行比色测定药材中总生物碱,回收率平均为102.02%,RSD为2.38%(n=5)。方法简单快速。 Ultrasonic extraction was used for Pinellia sinensis medicinal materials. According to the principle of acid dye colorimetry, the total alkaloids in the medicinal materials were determined colorimetrically at λmax=416 nm. The average recovery rate was 102.02% and the RSD was 2.38% (n=5). The method is simple and fast.