HPLC测定葶苈子炮制前后5个成分的含量变化

Determination of Contents of Five Components in Descurainiae Semen Before and After Being Processed by HPLC

目的:建立葶苈子中5个指标成分的HPLC含量测定方法,研究炮制前后葶苈子中5个成分的含量变化规律。方法:采用HPLC同时测定槲皮素-3-O-β-D-葡萄糖-7-O-β-D-龙胆双糖苷(QGG),芥子酸,槲皮素-3-O-β-D-吡喃葡萄糖苷(QG),异鼠李素-3-O-β-D-吡喃葡萄糖苷(IG)和1,2-O-二-芥子酰基-β-D-吡喃葡萄糖苷(SG)共5个成分的含量,分析炮制前后的含量变化规律及其原因。色谱条件为Waters Symmetry~ C_(18)色谱柱(4. 6 mm×250 mm,5μm),流动相乙腈(A)-1%乙酸水溶液(B)梯度洗脱(0～5 min,5%～10%A; 5～15 min,10%～13%A; 15～23 min,13%～20%A; 23～43 min,20%～25%A; 43～46 min,25%A; 46～55 min,25%～40%A; 55～60 min,40%A),流速1 m L·min^(-1),检测波长265 nm,进样量10μL,柱温30℃。结果:上述5个成分炮制前的质量分数分别为0. 114 3%,0. 041 6%,0. 036 2%,0. 022 6%,0. 097 6%;炮制后的质量分数分别为0. 107 4%,0. 011 3%,0. 034 2%,0. 021 9%,0. 058 9%; 5个成分的质量分数分别下降了6. 04%,72. 84%,5. 52%,3. 10%,39. 65%。结论:葶苈子中所含的这5个成分含量经炮制后均有不同程度的降低,其中苯丙素类成分炮制后含量明显下降,而黄酮苷类成分的含量变化则不明显。

Objective:HPLC for the determination of five components in Descurainiae Semen was established to investigate the change rule of contents of five components in the herb before and after being processed.Method:The contents of quercetin-3-O-β-D-glucose-7-O-β-D-gentiobioside(QGG),sinapic acid,quercetin-3-O-β-D-glucopyranoside(QG),isorhamnetin-3-O-β-D-glucopyranoside(IG)and 1,2-di-O-sinapoyl-β-D-glucopyranose(SG)was determined simultaneously by HPLC,the change rule of contents of these components before and after processing and its reasons were analyzed.Waters SymmetryC18 column(4.6 mm×250 mm,5μm)was employed,and the mobile phase was acetonitrile(A)-1%acetic acid aqueous solution(B)for gradient elution(0-5 min,5%-10%A;5-15 min,10%-13%A;15-23 min,13%-20%A;23-43 min,20%-25%A;43-46 min,25%A;46-55 min,25%-40%A;55-60 min,40%A).The flow rate was1 m L·min-1.The detection wavelength was set at 265 nm,the injection volume was 10μL,and the column temperature was 30℃.Result:Contents of the above five components before processing were 0.114 3%,0.041 6%,0.036 2%,0.022 6%and 0.097 6%;after processing,the contents of these five components turn into 0.107 4%,0.011 3%,0.034 2%,0.021 9%and 0.058 9%;among them,the contents of these five components decreased by 6.04%,72.84%,5.52%,3.10%and 39.65%,respectively.Conclusion:The contents of these five components in Descurainiae Semen is reduced to varying degrees after processing.The contents of phenylpropanoids decrease significantly,while the contents of flavonoid glycosides do not change significantly.