RP-HPLC法测定毛冬青缓释片中原儿茶醛的含量

目的建立测定毛冬青缓释片中原儿茶醛含量的方法.方法采用反相高效液相色谱法,色谱柱:AgilentC8柱(4.6×150 mm,5 μm),流动相:甲醇-1%冰乙酸水溶液(梯度洗脱),柱温:30℃,检测波长:312 nm,流速:1 mL/min.结果在11.7～140.4 ng范围内,原儿茶醛与色谱峰面积呈良好的线性关系,r=0.99995,平均加样回收率为96.41%,RSD=1.04%(n=5).结论该方法准确,稳定性、重现性好,适于毛冬青缓释片中原儿茶醛的含量测定,可有效地控制产品质量.

Determination of the Protocatechualdehyde in Maodongqing Sustained - release Tablet by RP - HPLC

Object To establish a new method to determine protocatechualdehyde in Maodongqing Sustained- release Tablet. Methods The RP- HPLC method was applied with CH3OH and 1 % acetic acid as mobile phase, flowrate at 1.0 mL/min, and detection wavelength at 312 nm. Results In the range from 11.7 ng to 140.4 ng, protocatechualdehyde was in a good line with peak area, r=0.99995, the average recovery ratio was 96.41 % , RSD=1.04 % (n=5). Conclusions It was the first time to establish the RP- HPLC method to determine and control the protocatechualdehyde in Maodongqing Sustained- release Tablet with accuracy and a good reproducibility.