Fourteen reference standards of ginsenosides Rb1, Rb2, Rb3, Rc, Rd, Re, Rf, Rg1, Rg2, Rg3, Rh1, Rh2, F2, and 24(R)-pseudoginsenoside F11 (p-F11) were purchased from Star Ocean Ginseng Ltd. (Suzhou, China). The purities of the fourteen standards were no less than 98.0%. Their structures are shown in Figure 1 . LC–MS-grade acetonitrile (MeCN) and water were supplied by Merck (Phillipsburg, NJ, USA). LC-grade methanol (MeOH) and formic acid (HCOOH) were purchased from Fisher Chemical (Pittsburgh, PA, USA). Water (for extraction) was obtained from a Milli-Q Ultra-pure water system (Millipore, Billerica, MA, USA). Other reagents used in this study were of analytical grade.
Lc grade methanol meoh
Manufactured by Thermo Fisher Scientific
Sourced in United States
LC-grade methanol (MeOH) is a high-purity organic solvent commonly used in liquid chromatography (LC) applications. It serves as a mobile phase component in various LC techniques, including high-performance liquid chromatography (HPLC) and ultra-high-performance liquid chromatography (UHPLC).
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2 protocols using lc grade methanol meoh
1
Ginsenoside Reference Standards Characterization
2
Ginsenoside Reference Standards Analysis
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Twenty-three reference standards of ginsenosides Rg1, Re, Rf, Rb1, 20S-Rg2, 20R-Rg2, 20S-Rh1, 20R-Rh1, Rc, Rb2, Rb3, Rd, 20S-Rg3, 20R-Rg3, 20S-Rh2, 20R-Rh2, Rh3, Rh4, Rk2, Rk3, 20S-PPT, 20S-PPD, and F2 were purchased from Star Ocean Ginseng Ltd (Suzhou, China). The purities of all reference standards were above 98.0%. LC-MS–grade acetonitrile (MeCN) and water were purchased from Merck (Phillipsburg, NJ, USA). LC-grade methanol (MeOH) and formic acid (HCOOH) were obtained from Fisher Chemical (Pittsburgh, PA, USA). Water (for extraction) was obtained from a Milli-Q Ultra-pure water system (Millipore, Billerica, MA, USA). Other reagents used in this study were of analytical grade.
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