Journal of Ginseng Research

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Journal of Ginseng Research Chemical transformation and target preparation of saponins in stems and leaves of Panax notoginseng Ru-Feng Wang, Juan Li, Hai-Jun Hu, Jia Li, Ying-Bo Yang, Li Yang, Zheng-Tao Wang Journal of Ginseng Research DOI: 10.1016/j.jgr.2016.08.009 Copyright © 2016 Terms and Conditions

Fig. 1 UPLC-Q/TOF-MS base peak ion chromatograms of (A) leaf and stem saponins of Panax notoginseng (PNLSS) and (B) acid hydrolysates of PNLSS in the negative ion mode ranging from 6 min to 18 min. Acid hydrolysates of PNLSS were obtained by hydrolyzing in acetic acid for 3 h at 55°C. UPLC-Q/TOF-MS analysis was performed under the conditions described in the Materials and methods section. UPLC-Q/TOF-MS, ultraperformance liquid chromatography coupled with quadruple-time-of-flight mass spectrometry Journal of Ginseng Research DOI: (10.1016/j.jgr.2016.08.009) Copyright © 2016 Terms and Conditions

Fig. 2 The acid hydrolyzing dynamic changes of chemical compositions in leaf and stem saponins of Panax notoginseng (PNLSS). The reaction conditions of acidic hydrolysis of PNLSS were described in the Materials and methods section. Y axis label (Ax/A0 %) represents the ratio of electrospray ionization peak areas of determined ginsenosides to internal standard (digoxin) and assigned as the relative response values. (A) Chemical transformation of PNLSS was monitored at 0 h, 1 h, 3 h, 5 h, 12 h, 24 h, 36 h, and 60 h, respectively. (B) Effect of temperatures on transformation of saponins at 25°C, 40°C, 55°C, and 70°C for 3 h, respectively. (C) Effect of acetic acid concentrations on conversion of saponins at 55°C for 3 h with 2%, 10%, 25% and 40% concentrations of acetic acid Journal of Ginseng Research DOI: (10.1016/j.jgr.2016.08.009) Copyright © 2016 Terms and Conditions

Fig. 3 Chemical transformation pathways of saponins in leaf and stem saponins of Panax notoginseng under acidic conditions. The reaction conditions of acidic hydrolysis of leaf and stem saponins of Panax notoginseng are described in the Materials and methods section Journal of Ginseng Research DOI: (10.1016/j.jgr.2016.08.009) Copyright © 2016 Terms and Conditions

Fig. 4 Extracted chromatograms of supernatant by UHPLC-MS/MS at different times. UHPLC-MS/MS analysis was performed under the conditions described in the UHPLC-MS/MS analysis section of Materials and methods. UHPLC-MS/MS, ultrahigh-performance liquid chromatography coupled with tandem mass spectrometry Journal of Ginseng Research DOI: (10.1016/j.jgr.2016.08.009) Copyright © 2016 Terms and Conditions