HPLC法测定盐酸美沙酮含量

Determination of methadone hydrochloride by HPLC

本文采用高效液相色谱法，以盐酸布比卡因为内标，检测波长220nm，在Symmetry-C18柱上，以己腈-磷酸二氢钾（pH2．5）（3862，V／V）为流动相，测定盐酸美沙酮及其口服液的含量。方法平均回收率为100．17％，日内及日间的RSD均＜1％。方法简便、快速、准确。

To estab1ish a HPLC method for determining methadone hydrochloride and methadone hydrochloride oral solution.Using a Symmetry-C18 Chlumn,a mixture of acetoni trile-monobasic potassium phosphate(pH2.5)(38:62,V/V)as mobile phase and detected at 220nm bupivacaine hydrochloride was used as internal standard.The average recovery was 100.17%.The RSD for the inter inter and intra-day were all less than 1%.The method is simple,rapid and accurate.