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采用石油醚-硫酸溶液两相溶剂水解,UPLC-PDA法测定白花延龄草根茎和果实甲醇提取物中薯蓣皂苷元含量。色谱柱Waters BEH C18(2.1mm ×100mm ,1.7μm );检测器PDA。流动相乙腈(A )-水(B ),线性梯度洗脱:0min~8.0min ,50%~90%A;8.0min~8.1min ,90%~100% A;8.1min~11.0min ,100% A;11.1min ,100%~50% A。流速0.4mL/min;柱温50℃;检测波长192nm;进样量5μL。结果