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Table 2 shows the regression equation for each reference compound, as well as the LOD and LOQ values and the mass spectrometry information. All the components showed good linearity (r > 0.9991) in a relatively wide concentration range. Tables ?Tables33 and ?and44 provide precision and recovery results of the 10 components, respectively. The intraday variations of the compounds were [http://www.selleckchem.com/products/azd9291.html AZD9291 in vivo] ions chromatograms for the determination of the [http://www.selleckchem.com/products/carfilzomib-pr-171.html PR-171 research buy] 10 analytes. (a) Atractylenolide I (2.28?min). (b) Atractylenolide III (1.83?min). (c) Calycosin-7-O-��-D-glucoside (1.04?min). (d) Fangchinoline (0.98?min). ... Table 2 Calibration curves, LOD, and LOQ of the 10 major compounds. Table 3 Precision and repeatability for the assay of the 10 major compounds. Table 4 Recovery of the 10 major compounds in Fangji Huangqi Tang (n = 3). 3.3. Sample Analysis The developed UHPLC-MS/MS method was subsequently applied to analysis and quality evaluation of FHT. The content of these major constituents in FHT was shown in Table 5. Table 5 Content of the 10 major compounds in different batches of Fangji Huangqi Tang (��g/mL). 4. Conclusions A rapid UHPLC-MS/MS method was established for the comprehensive analysis of FHT. This method could separate the complex constituents in a short run time. Furthermore, [http://en.wikipedia.org/wiki/YES1 YES1] MS/MS proposed high sensitivity which is helpful for the quantification of the low-content compounds. The method was successfully applied to the simultaneous determination of 10 bioactive compounds in FHT. This available, rapid, and reliable method is fit for routine analysis and effective quality control of this Chinese herbal prescription. Acknowledgments This research was financially supported by the Youth Natural Science Foundation of Nanjing University of Chinese Medicine (no. 13XZR25), Natural Science Foundation of Jiangsu province (BK20140964), a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the National Natural Science Foundation of China (no. 81503207). Abbreviations UHPLC-QqQ-MS: Ultrahigh performance liquid chromatography method coupled with triple quadrupole mass spectrometry TCM: Traditional Chinese medicine HPLC-DAD: High performance liquid chromatography with diode array detection UV: Ultraviolet HPLC-ELSD: High performance liquid chromatography with evaporative light scattering detector LC-ICPMS: Liquid chromatography with inductively coupled plasma mass spectrometry.