Microanalysis of Multi-Element in Juncus effusus L. by LIBS Technique

Laser-induced breakdown spectroscopy （LIBS） was used to decipher the unique multi-elemental characteristics of Juncus effusus L. The spectral fingerprints of Juncus effusus L. were established based on elemental microanalysis via LIBS. Microanalysis and multimode sampling methodologies were designed in this study. The relative standard deviation （RSD） approach was performed to optimize the multi-shot measurements. Taking advantage of the capability with no or minimal sample pre-treatment of LIBS, a thermodynamic chart of four elements （Mg, Ca, Ba, and Na） was created from twelve collection regions. The diagram of elemental distribution on a micro-scale was generated to explore the nature of Juncus effusus L. by LIBS. The results demon- strated that LIBS is a promising technique for rapid elemental microanalysis of heterogeneous samples.

灯心草煅炭前后UPLC指纹图谱研究及菲类成分含量测定

目的:建立灯心草及其炮制品灯心炭超高效液相色谱法(UPLC)指纹图谱及灯心草中3个菲类成分含量测定方法,比较灯心草炮制前后质量差异。方法:采用UPLC建立灯心草、灯心炭指纹图谱,并进行相似度评价,采用方差分析、聚类分析(CA)、主成分分析(PCA)对结果进行评价。结果:建立了灯心草与灯心炭UPLC指纹图谱,生品标定15个共有峰,炭品标定16个共有峰,与相对应的对照指纹图谱相似度均大于0.89;通过CA将灯心草和灯心炭聚为两类,PCA筛选出4个主因子;确定了灯心草3个菲类成分的UPLC定量方法。结论:建立的指纹图谱方法稳定可靠,炮制后灯心草化学成分发生变化,为灯心草临床用药及质量控制提供参考。