基于UPLC-Q-TOF-MS内标物标准指纹图谱的土茯苓质量评价

目的: 运用超高效液相色谱与飞行时间质谱(UPLC-Q-TOF-MS),研究贵州产土茯苓的质谱指纹图谱,建立标准指纹图谱。方法: 采用Acquity超高效液相系统,在电喷雾(ESI)负离子模式下记录质谱数据。通过软件提取原始数据表单,以线性插值的方式计算获得标准相对时间下的全局校正图谱,均值法生成标准指纹图谱,并进行基于图谱全局的相似度评价。结果: 建立了土茯苓基于内标校正的质谱指纹图谱共有模式;基于图谱全局的相似度分析,在2个相似度参数上得到了一致性的结果。结论: 基于内标校正的质谱共有模式准确可靠,可用性极大提高,更好地反映贵州产地域性药材土茯苓的内在质量。

Objective: To establish the standard fingerprint of Smilacis Glabrae Rhizoma in Guizhou province by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS). Methods: The analysis was performed on an Acquity UPLC, and the mass spectrum data was recorded with negative ion electrospray ionization (ESI) modes. The complete original data was parsed using MS toolbox in MATLAB, and linear interpolation calculation was employed to get global correction chromatogram by relative time. Then, standard fingerprint was generated through the average method, and similarity evaluation was carried out based on the global chromatogram. Results: Standard fingerprint of Smilacis Glabrae Rhizoma was established preliminarily by mass. Consistent results were observed from the two similarity parameters with similarity evaluation based on the 28 chromatographic peaks. Conclusion: Standard fingerprint of MS based on internal standard calibration is accurate, reliable, and convenient to use, which can well reflect the inner quality of Smilacis Glabrae Rhizoma in Guizhou province.