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Spray Drying of Roselle ( Hibiscus sabdariffa L.) Extract
Author(s) -
ALKAHTANI HASSAN A.,
HASSAN BAKRI H.
Publication year - 1990
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1990.tb01601.x
Subject(s) - hibiscus sabdariffa , spray drying , solubility , chemistry , particle size , dissolution , water content , bulk density , moisture , food science , chromatography , organic chemistry , environmental science , geotechnical engineering , soil science , engineering , soil water
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.