高效液相色谱法测定石蒜中加兰他敏、力可拉敏及石蒜碱3种生物碱

以石蒜鳞茎为材料,建立了石蒜生物碱的反相高效液相色谱(HPLC)分析方法。探讨了流动相中乙腈含量、三乙胺含量、pH值、流速等对生物碱分离的影响,结果表明在ZORBAX ODS-C18(150 mm×4.6mm,5μm)反相色谱柱上,以0.9%三乙胺水溶液(pH 8.0)-乙腈-甲醇为流动相,梯度洗脱,流速为1mL/min,检测波长为234 nm时,石蒜样品可有效分离出14种石蒜生物碱,分离度良好。加兰他敏、力可拉敏和石蒜碱的检出限分别为3.375、0.475、0.495 mg/L,平均加标回收率均为98%。运用此法测定了石蒜不同部位中3种生物碱的含量,结果表明石蒜不同部位的3种生物碱含量差异较大,叶子中的含量最高;同一部位中,石蒜碱的含量最高,力可拉敏次之,加兰他敏最低。     

HPLC法同时测定石蒜中加兰他敏和石蒜碱

建立了高效液相色谱同时测定石蒜中加兰他敏和石蒜碱含量的方法。 采用phenomenex-C18色谱柱,以乙腈(A)-0.1%TFA水溶液(B)为流动相梯度洗脱,检测波长289 nm。 结果表明,加兰他敏和石蒜碱均在0.5～10 mg/L(r=0.9999)呈现良好的线性关系,最低检测限(S/N=3)分别为0.09和0.15 mg/L,平均加样回收率分别为99.53%和96.82%。 该方法简单、快速、准确,适合于石蒜中加兰他敏和石蒜碱的测定。     

Comparison of different HPLC systems for analysis of galantamine and lycorine in various species of Amaryllidaceae family

Retention parameters of galantamine and lycorine standards were determined on different columns, i.e., octadecyl silica, SM C18, and strong cation-exchange (SCX) columns with different aqueous mobile phases. Retention of alkaloids was investigated on C18, SM C18 columns with mobile phase containing 5% MeCN, 20% acetate buffer at pH 3.5, and 0.025 ML^?1 diethylamine (DEA), and on SCX column with mobile phase containing 8% MeCN and phosphate buffer at pH 2.5. Better results were also obtained in ion-exchange chromatographic system. On the basis of results obtained in different chromatographic systems, simple, rapid, and sensitive high-performance liquid chromatography methods were developed for determining lycorine and galantamine in plant extracts from various species belonging to Amaryllidaceae family. Extracts were prepared from various parts of plants collected at different times of the growing season.     

超高效液相色谱-四极杆线性离子阱质谱法同时检测石蒜属3种生物碱

基于超高效液相色谱-串联四极杆/线性离子阱质谱(UPLC-QTRAP-MS/MS),建立了一种同时检测石蒜属植物中加兰他敏(Gal)、力可拉敏(Lycm)和石蒜碱(Lyc)含量的方法。提取液超声波辅助提取离心后,经Waters ACQUITY UPLC BEH C18(150 mm×2.1 mm,1.7μm)色谱柱,以水溶液(0.1%甲酸)-乙腈为流动相梯度洗脱,流速0.2 m L/min,在正离子扫描下以MRM模式进行分析。结果表明,Gal、Lycm和Lyc在0.5~500μg/L质量浓度范围内线性关系良好,相关系数达0.999 9~1.000 0,可在6.0 min内得到检测结果,Gal、Lycm和Lyc的保留时间分别为2.86、2.31、1.95 min。3种物质的加标回收率为97.2%~98.6%,相对标准偏差为0.8%~4.3%。应用此方法测得石蒜属12个种的Gal、Lycm和Lyc含量分别在21.98~496.77、0.17~467.21、9.34~4 510.18μg/g干重之间,3种物质含量在种间差异均较大。