High Speed Analysis of Fat-Soluble Vitamins by Ultra High-performance Liquid Chromatography with Photodiode Array Detection
August 24, 2022
Introduction
Vitamins are essential nutrients to all living organisms and are organic compounds required in small amounts for healthy physiological activity. The class of fat-soluble vitamins is insoluble in water but readily dissolve in oil and thus when consumed in excess may have a detrimental impact on the human body, as they are difficult to excrete.
This application note describes the analysis of fat-soluble vitamins using UHPLC and PDA detection with a high speed data sampling rate of 100 spectra/sec.
Experimental
Equipment
| Pump: | X-LC 3185PU x 2 |
| Degasser: | X-LC 3080DG |
| Mixer: | X-LC 3180MX |
| Column Oven: | X-LC 3067CO |
| Autosampler: | X-LC 3159AS |
| Detector: | X-LC 3110MD |
Conditions
| Column: | ZORBAX SB-C18 (3.0 mmID x 50 mmL, 1.8 µm) |
| Eluent: | Acetonitrile/Methanol (70/30) |
| Flow Rate: | 0.8 mL/min |
| Column Temp.: | 30 ºC |
| Wave Length: | 200-500 nm |
| Injection Volume: | 1 µL |
| Standard Sample: | 10 fat-soluble vitamin standards |
Keywords
UHPLC, Fat-soluble vitamin, Vitamin K3, Vitamin A, Retinol acetate, Vitamin K2, d-tocopherol, Vitamin D2, Vitamin D3, a-tocopherol, Tocopherol-a-acetate, Vitamin K1, C18 Column, PDF detector
Results
A contour plot and chromatogram of the fat-soluble vitamin standard mixture are shown in Figure 1. Excellent separation of the 10 vitamins was obtained in under 4 minutes.
The on-peak spectra of fat-soluble vitamin standard mixture are shown in Fig. 2.
| 1: Vitamin K3 (Menadione) | 5: Vitamin E ( -Tocopherol) | 9: Vitamin E acetate |
| 2:Vitamin A (Retinol) | 6: Vitamin D2 (Ergocalciferol) | 10: Vitamin K1 (Phytonadione) (0.1 mg/mL each) |
| 3: Vitamin A Acetate (Retinol acetate) | 7: Vitamin D3 (Cholecalciferol) | |
| 4: Vitamin K2 (Menaquinone) | 8: Vitamin E ( -Tocopherol) |
