An Effective Chromatography Process for Simultaneous Purification and Separation of Total Lignans and Flavonoids from <i>Valeriana amurensis</i>.

Abstract

An effective chromatography process was developed and validated for simultaneous purification and separation of total lignans and flavonoids from <i>Valeriana amurensis</i>. The total lignans and flavonoids in <i>Valeriana amurensis</i> extract were prepurified with macroporous resin column chromatography, and the conditions were optimized as follows: 40 mg/mL <i>Valeriana amurensis</i> extract (2.0 g) solution was loaded onto an AB-8 resin column with a diameter-to-height ratio of 1:7, followed by adsorption for 6 h; then, the column was eluted successively with 5 BV water and 10% and 50% ethanol at a flow rate 2 BV/h. The obtained 50% ethanol fraction was further repurified and separated by polyamide resin column chromatography to obtain the total lignans and flavonoids, respectively. The chromatography conditions were optimized as follows: a 50% ethanol fraction (1.0 g) was mixed with 1.0 g polyamide resin and loaded onto a polyamide resin (60-100 mesh) column with a diameter-to-height ratio of 1:3; then, the column was eluted successively with 6 BV water and 40% and 80% ethanol at a flow rate of 4 BV/h. The total lignans and flavonoids were obtained from water and 80% ethanol fraction, respectively. The content and recovery of standard compounds in total lignans and flavonoids were analyzed with HPLC-PDA, and the feasibility of the process was confirmed.