Research on concentration of 5 different ginsenosides in Panax japonica collected from different cultivated geographic regions / 中国中药杂志

In this paper, an HPLC-QqQ-MS method for determination of 5 different ginsenosides of Panax japonica collected from different cultivated geographic regions was established. The separation was performed on a Zorbax XDB-C₁₈ (4.6 mm×100 mm, 1.8 μm) column with the gradient elution of acetonitrile (contained 0.1% formic acid)-0.1% formic acid water. The flow rate was 0.5 mL•min⁻¹. The colunm temperature was maintained at 30 ℃. The analytes were detected using electrospray ionization (ESI) in multiple reaction monitoring (MRM) modes. Reaction selected ions were 203.2 for ginsenoside Re, 202.9 for ginsenoside Rg₁, 365.0 for ginsenoside Rf, 789.1 for ginsenoside Rd, 360.9 for ginsenoside Ro. Ginsenosides Re, ginsenosides Rg₁, ginsenosides Rf, ginsenosides Rd, ginsenosides Ro had good linearity in the ranges of 3.33-66.60 μg (r=0.999 1),2.83-56.54 μg (r=0.999 2), 0.32-6.51 μg (r=0.999 2), 12.55-251.00 μg (r=0.999 3), 0.85-16.90 μg (r=0.999 5), respectively. The results of recovery were among 100.8% to 104.6%, and the values of RSD were blow 3.0%. This method is simple, reliable and accurate, and can provide basis for P. japonica basic research.

Study on HPLC fingerprint and chemical constituent difference of different species of Aurantii Fructus Immaturus / 中国中药杂志

This study is to establish an HPLC fingerprint by HPLC-DAD method and simultaneous quantitative analysis of 17 components of 18 batches of Citrus aurantium and 10 batches of C. sinensis. The separation was performed on an Agilent Poroshell 120 SB-C₁₈ (4.6 mm×100 mm,2.7 μm) column with the gradient elution of methanol-0.1% formic acid water, the flow was 0.6 mL•min⁻¹. The detection wavelength was set at 318 nm. The column temperature was maintained at 30 ℃. The data calculation was performed with similarity evaluation system for chromatographic fingerprint of traditional Chinese medicine (Version 2004A) together with SIMCA-P 13.0 software to clarify the differential marker between these two different species of Aurantii Fructus Immaturus. This method has good precision stability and repeatability that could provide basis for quality control and evaluation of Aurantii Fructus Immaturus.