Spray Drying of Roselle (Hibiscus sabdariffa L.) Extract
Article first published online: 25 AUG 2006
Journal of Food Science
Volume 55, Issue 4, pages 1073–1076, July 1990
How to Cite
AL-KAHTANI, H. A. and HASSAN, B. H. (1990), Spray Drying of Roselle (Hibiscus sabdariffa L.) Extract. Journal of Food Science, 55: 1073–1076. doi: 10.1111/j.1365-2621.1990.tb01601.x
- Issue published online: 25 AUG 2006
- Article first published online: 25 AUG 2006
- Ms received 3/15/89; revised 4/7/89; accepted 2/9/90.
Hibiscus sabdariffa (Roselle) powder was produced by pilot scale spray drying using single strength and vacuum concentrated water extract of its calyces. Powders were analyzed for moisture, protein, vitamin C, total soluble solids (TSS), pH, particle size, bulk density, solubility, dispersibility, hygroscopicity, and microbiological status. The lowest inlet air temperature (198.5°C) resulted in the product with best protein content (12.43%), retention of vitamin C (82.76 mg/ 100g), and solubility (dissolving in 97 sec); as well as the highest moisture content (3.78%) in the product. The powder showed a noticeable tendency to stick to internal surfaces of the drying chamber particularly with concentrated solutions at higher temperatures.