This article describes the analysis of saponins in spine date seed using Agilent ZORBAX Solvent Saver HT (1.8 µm) columns. The two main active compounds, Jujuboside A and B, were extracted and analyzed by high performance liquid chromatography (HPLC) with Agilent ZORBAX Eclipse Plus C18 LC columns. The method was first developed on a traditional 4.6 mm × 150 mm, 5 µm column and then transferred to a ZORBAX Eclipse Plus Solvent Saver High Throughput (1.8 µm) C18 column, 3.0 mm × 50 mm, 1.8 µm. The advantages of the Solvent Saver HT column include low solvent consumption and faster analysis. An evaporative light scattering detector (ELSD) was used due to the lack of chromophores in the two compounds. This provided higher sensitivity and a cleaner baseline compared with UV detection.
This document details a high-performance liquid chromatography (HPLC) method for analyzing Jujuboside A and B in spine date seeds. The method utilizes an Agilent ZORBAX Eclipse Plus C18 column and an Evaporative Light Scattering Detector (ELSD) to achieve high sensitivity and a clean baseline, as these saponins lack chromophores for UV detection.
The note compares a traditional 4.6 mm x 150 mm column with a new ZORBAX Solvent Saver HT (1.8 µm) column. Results indicate that switching to the smaller column significantly reduces solvent consumption and analysis time while maintaining peak resolution and efficiency.
| Column dimensions (Traditional) | 4.6 mm x 150 mm, 5 µm |
|---|---|
| Mobile Phase | 35% water, 65% methanol |
| Flow rate (Solvent Saver HT) | 0.4 mL/min |
| Injection volume (Traditional) | 5 µL |
| Injection volume (Solvent Saver HT) | 2 µL |
| Detector | Evaporative Light Scattering Detector (ELSD) |
| ELSD Temperature | 40°C |
| ELSD Pressure | 3.5 bar |
ELSD is used because the saponin compounds lack chromophores and do not produce a sufficient signal with an ultraviolet detector.
The Solvent Saver HT column offers low solvent consumption and faster analysis compared to traditional columns.
Changing to the Solvent Saver HT column allows for a savings of 87 percent of the solvent and 87 percent of the time.