[Preparation of three capsaicinoid components using preparative high performance liquid chromatography]

Area of Science:

• Analytical Chemistry
• Natural Product Chemistry

Context:

• Capsaicinoids are bioactive compounds found in chili peppers, known for their pungency and potential health benefits.
• Accurate isolation and identification of individual capsaicinoids are crucial for pharmacological and chemical research.

Purpose:

• To establish an efficient preparative high-performance liquid chromatography (Pre-HPLC) method for isolating three major capsaicinoid components.
• To identify and quantify the isolated capsaicinoids, assessing their purity and yield.

Summary:

• A preparative PRC-ODS column was utilized with a methanol-water mobile phase (70:30, v/v) at a flow rate of 15 mL/min for isocratic elution.
• Three capsaicinoid components were successfully isolated from an 80% capsaicinoid mixture and identified using 1H NMR and EI-MS as nordihydrocapsaicin, capsaicin, and dihydrocapsaicin.
• The isolated compounds achieved high purities (98.12%–100.7%) with significant yields (58.9%–72.3%), demonstrating the method's effectiveness.

Impact:

• Provides a reliable method for obtaining high-purity capsaicinoids, essential for detailed studies on their biological activities and chemical properties.
• Facilitates further research into the therapeutic potential and applications of individual capsaicinoids.
• Contributes to the advancement of separation science in natural product chemistry.