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目的:采用高效液相色谱法测定胡椒碱胶囊中胡椒碱含量。方法:以甲醇-水(77:23)为流动相,经Diamonsil C_(18)色谱柱(200 mm×4.6 mm,5μm)分离,流速1.0 ml·min~(-1),检测波长343 nm。结果:胡椒碱在0.5~50.0μg·ml~(-1)范围内呈现良好的线性关系(r=0.999 9),方法学精密度、重复性和稳定性均小于2%,胡椒碱平均回收率103.02%±4.09%(n=9)。结论:该方法简便、快速、准确,可用于测定胡椒碱胶囊中胡椒碱含量。
Objective: To determine the content of piperine in piperine capsules by high performance liquid chromatography. METHODS: The separation was performed on a Diamonsil C 18 column (200 mm × 4.6 mm, 5 μm) with methanol-water (77:23) as the mobile phase at a flow rate of 1.0 ml · min -1 with a detection wavelength of 343 nm. Results: Piperine showed a good linearity (r = 0.999 9) in the range of 0.5-50.0 μg · ml -1. The precision, repeatability and stability of piperine were both less than 2%. The average recovery of piperine 103.02% ± 4.09% (n = 9). Conclusion: The method is simple, rapid and accurate and can be used for the determination of piperine in piperine capsules.