A novel fluorimetric method for determination of paeonol,an active component of Chinese herbal medicine,is proposed.The method is based on the reaction of paeonol with aluminum ion in pH 4.4 HAc-NaAc buffer to form a ...A novel fluorimetric method for determination of paeonol,an active component of Chinese herbal medicine,is proposed.The method is based on the reaction of paeonol with aluminum ion in pH 4.4 HAc-NaAc buffer to form a fluorescent Al(Ⅲ)-paeonol complex.The maximum excitation wavelength and emission wavelength of the complex were 296 nm and 455 nm,respectively.The fuorescence quantum yield of the complex was determined to be 0.053 at an excitation wavelength of 296 nm.A linear calibration curve covered the concentration range 0.017-1.2μg/mL.The method has been applied to the analysis of paeonol in medicinal crop Cynanchi Paniculati Radix(Xuchangqing),and the results demonstrated that this method can be used for quality evaluation of crude drug Xuchangqing.展开更多
目的:建立青阳参苷甲对照品的制备方法和含量测定,为质量标准的提高提供参考。方法:采用植物化学方法制备青阳参苷甲作为对照品,采用质谱、核磁共振等光谱法鉴定对照品的结构,采用面积归一化法测定了对照品含量,并建立高效液相色谱法测...目的:建立青阳参苷甲对照品的制备方法和含量测定,为质量标准的提高提供参考。方法:采用植物化学方法制备青阳参苷甲作为对照品,采用质谱、核磁共振等光谱法鉴定对照品的结构,采用面积归一化法测定了对照品含量,并建立高效液相色谱法测定青阳参及同属药材白前、白薇和徐长卿中青阳参苷甲的含量。采用Waters X Select C18色谱柱(4.6 mm×250 mm,5μm),流动相为乙腈-水溶液(43∶57),流速1.0 m L·min^(-1);检测波长223 nm;柱温30℃;进样量10μL。结果:经过鉴定分离的青阳参苷甲纯度大于98%,可作为质量研究用对照品。青阳参苷甲质量浓度在5.62~224.8μg·mL^(-1)(r=0.9998,n=6)范围内线性关系良好,方法的平均回收率(n=6)为97.7%(RSD=1.4%)。白前、白薇和徐长卿中未检出青阳参苷甲,青阳参中青阳参苷甲含量在0.015%~0.070%。结论:青阳参苷甲是青阳参的特征成分,可作为该药材的定量指标。本文所建立的高效液相色谱法可作为青阳参药材质量标准中的含量测定方法。展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.20675025,20975029 and 81173496).
文摘A novel fluorimetric method for determination of paeonol,an active component of Chinese herbal medicine,is proposed.The method is based on the reaction of paeonol with aluminum ion in pH 4.4 HAc-NaAc buffer to form a fluorescent Al(Ⅲ)-paeonol complex.The maximum excitation wavelength and emission wavelength of the complex were 296 nm and 455 nm,respectively.The fuorescence quantum yield of the complex was determined to be 0.053 at an excitation wavelength of 296 nm.A linear calibration curve covered the concentration range 0.017-1.2μg/mL.The method has been applied to the analysis of paeonol in medicinal crop Cynanchi Paniculati Radix(Xuchangqing),and the results demonstrated that this method can be used for quality evaluation of crude drug Xuchangqing.
文摘目的:建立青阳参苷甲对照品的制备方法和含量测定,为质量标准的提高提供参考。方法:采用植物化学方法制备青阳参苷甲作为对照品,采用质谱、核磁共振等光谱法鉴定对照品的结构,采用面积归一化法测定了对照品含量,并建立高效液相色谱法测定青阳参及同属药材白前、白薇和徐长卿中青阳参苷甲的含量。采用Waters X Select C18色谱柱(4.6 mm×250 mm,5μm),流动相为乙腈-水溶液(43∶57),流速1.0 m L·min^(-1);检测波长223 nm;柱温30℃;进样量10μL。结果:经过鉴定分离的青阳参苷甲纯度大于98%,可作为质量研究用对照品。青阳参苷甲质量浓度在5.62~224.8μg·mL^(-1)(r=0.9998,n=6)范围内线性关系良好,方法的平均回收率(n=6)为97.7%(RSD=1.4%)。白前、白薇和徐长卿中未检出青阳参苷甲,青阳参中青阳参苷甲含量在0.015%~0.070%。结论:青阳参苷甲是青阳参的特征成分,可作为该药材的定量指标。本文所建立的高效液相色谱法可作为青阳参药材质量标准中的含量测定方法。
