HPLC法同时测定地黄中的5种核苷和碱基的含量(英文)

建立HPLC法同时测定来自中国不同地区的地黄中次黄嘌呤、尿苷、腺嘌呤、鸟苷、腺苷等5种核苷类成分的含量。采用的色谱柱为Diamonsil C18柱(250 mm×4.6 mm,5μm),流动相为乙腈-0.04 mol.L-1磷酸二氢钾溶液梯度洗脱,流速1 mL.min-1,柱温30℃,检测波长254 nm。次黄嘌呤、尿苷、腺嘌呤、鸟苷和腺苷的质量浓度分别在1.0～16.0μg.mL-1(r2=0.999 8),5.0～80.0μg.mL-1(r2=0.999 8),1.0～16.0μg.mL-1(r2=0.999 5),1.25～20.0μg.mL-1(r2=0.999 8)和1.0～16.0μg.mL-1(r2=0.999 8)内线性关系良好,平均回收率为98.8%～100.7%。结果表明,不同地区的地黄中次黄嘌呤、尿苷、腺嘌呤、鸟苷和腺苷的含量有显著性差异。该方法准确,重复性好,适用于地黄药材中5种核苷类成分的含量测定。

Simultaneous determination of five nucleosides and nucleobases of Rehmannia glutinosa Libosch. by high performance liquid chromatography

This study is to establish a method for simultaneously determination of five nucleosides and nucleobases, including hypoxanthine, uridine, adenine, guanosine and adenosine in Rehmannia glutinosa Libosch. which was collected from different regions in China. A Diamonsil C18 column (250 mm x 4.6 mm, 5 microm) was used. Acetonitrile and 0.04 mol L(-1) potassium dihydrogen phosphate solution were adopted as mobile phase with gradient elution. The flow rate was 1 mL min(-1) and column temperature was 30 degrees C. The detection wavelength was at 254 nm. The method had good linearity over the range of 1.0 - 16.0 microg mL(-1) (r2 = 0.999 8), 5.0 - 80.0 microg mL(-1) (r2 = 0.999 8), 1.0 - 16.0 microg mL(-1) (r2 = 0.999 5), 1.25 - 20.0 microg mL(-1) (r2 = 0.999 8) and 1.0 - 16.0 microg mL(-1) (r2 = 0.999 8) for hypoxanthine, uridine, adenine, guanosine and adenosine, respectively. The average recoveries were between 98.8% and 100.7%. The content of hypoxanthine, uridine, adenine, guanosine and adenosine in Rehmannia glutinosa Libosch. from different regions was significantly different. This established method was sensitive and reliable for the quantification of five chemical constituents in Rehmannia glutinosa Libosch.