Physico-Chemical changes in valencia orange concentrate during commercial scale vacuum concentration
Keywords:
Orange, Physico-chemical, Vacuum, Solids, Refractometric
Abstract
"Changes in the refractometric solids (Brix), viscosity, spectral reflectance (color), pH, acidity, Brix/acid ratio, color, true ascorbic acid and carotene during commercial scale vacuum concentration of Valencia orange juice in a forced circulation, single-pass, falling-film Evaporator have been reported. With the advancing concentration, there was a gradual increase in Brix, acidity, viscosity, color, ascorbic acid and carotene, no change in Brix/acid ratio but a slight fall in pH. Upto 4-fold concentration of the Juice, the increase in viscosity was comparatively slight, but after 5-fold concentration, there was a steep rise in viscosity. There were negligible losses in carotene while the losses in true ascorbic acid were well within 5% during concentration up to 63Degree Brix. Use of mid-season, healthy ripe oranges for juice extraction and concentration of the flash-heated juice (195Degree-200DegreeF for 10-12 seconds) upto 5-fold concentration are suggested."
Published
2014-05-27
How to Cite
Pruthi, J. (2014). Physico-Chemical changes in valencia orange concentrate during commercial scale vacuum concentration. Defence Science Journal, 9(1), 6-13. https://doi.org/10.14429/dsj.9.7612
Issue
Section
Research Papers
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