[Studies on NACE-DAD fingerprint of Cortex Phellodendri]

Area of Science:

• Pharmacognosy
• Analytical Chemistry
• Quality Control

Context:

• Cortex Phellodendri is a traditional Chinese medicine with significant therapeutic value.
• Ensuring the quality and consistency of herbal medicines is crucial for their efficacy and safety.
• Variations in geographical origin and species can impact the phytochemical profile of medicinal plants.

Purpose:

• To establish a non-aqueous capillary electrophoresis with diode-array detection (NACE-DAD) method for fingerprint analysis of Cortex Phellodendri.
• To develop a reliable analytical technique for quality assessment of Cortex Phellodendri from diverse sources.
• To utilize fingerprint similarity evaluation and fuzzy cluster analysis for comparative quality assessment.

Summary:

• A NACE-DAD method was established using a buffer of 40 mmol/L sodium acetate and 40 mmol/L ammonium acetate in methanol (pH 5.8), with a separation voltage of 25 kV and detection at 210 nm.
• Berberine was used as a reference standard to determine the chromatographic fingerprint.
• Preliminary NACE-DAD fingerprints revealed 9 common peaks, with variations observed in some samples and significant differences in relative peak areas between Cortex Phellodendri and its processed products.

Impact:

• The developed NACE-DAD method provides a reliable, accurate, and efficient tool for the quality control of Cortex Phellodendri.
• This method can aid in distinguishing between different species and origins of Cortex Phellodendri, ensuring the use of high-quality material.
• The findings contribute to the standardization and quality assurance of herbal medicines in pharmaceutical applications.