Analysis of Paeoniflorin in White Peony (Shim-pack VP-ODS)

Significance of the topic

White Peony (Paeonia moutan) root is a key herbal medicine ingredient rich in the bioactive terpene glycoside Paeoniflorin. Accurate determination of this compound is essential for ensuring the quality, safety and efficacy of botanical preparations.

Objectives and Study Overview

This work aimed to develop and validate a simple, robust reversed-phase HPLC method for quantifying Paeoniflorin in commercially available White Peony powder.

Methodology and Sample Preparation

• Sample pretreatment: Weigh 0.1 g of powdered White Peony, extract with 50 mL ethanol under ultrasonic conditions (240 W, 45 kHz) for 30 minutes, cool, adjust volume to 50 mL and filter into an HPLC vial.
• Chromatographic conditions: Shim-pack VP-ODS column (250×4.6 mm, 5 µm) with isocratic elution using 0.1% phosphoric acid aqueous solution and acetonitrile (86:14), flow rate 1.0 mL/min, column temperature 25 °C, injection volume 10 µL, detection at 230 nm UV.

Used Instrumentation

• Shimadzu HPLC system with Shim-pack VP-ODS analytical column.
• Ultrasonic bath (240 W, 45 kHz) for extraction.
• LabTotal LC/LCMS vials for sample handling.

Results and Discussion

The method yielded a single, well-resolved Paeoniflorin peak matching the 60 µg/mL standard. Calibration demonstrated excellent linearity and reproducibility. Chromatograms of sample extracts showed no significant interferences, confirming method specificity.

Benefits and Practical Applications

• Isocratic conditions simplify operation and reduce solvent consumption.
• High sensitivity and selectivity support reliable routine quality control.
• Adaptable for use in research laboratories and industrial QC settings.

Future trends and potential applications

Expanding this protocol to other glycosides and phytochemicals could enhance herbal product profiling. Integration with UHPLC-MS/MS or automated sample preparation will further improve throughput and analytical performance.

Conclusion

A straightforward, reproducible RP-HPLC method for Paeoniflorin quantification in White Peony was established, offering a valuable tool for quality assurance in herbal medicine production.