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KMID : 1134819970260010081
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Journal of the Korean Society of Food Science and Nutrition
1997 Volume.26 No. 1 p.81 ~ p.86
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Processing of Powdered Jujube Juice by Spray Drying
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An Duck-Soon
Woo Kang-Lyung
Lee Dong-Sun
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Abstract
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Spray dried powdered juice was processed from concentrated extract of jujube(Zizyphus jujuba MILLER). Spray drying of the extract solution could not be operated to have powder product by itself over whole concentration range and required addition of some carrier or support material. The concentrated extract of 26°Bx was combined with carrier material solution to have a final concentration of 30°Bx, and then spray dried. Proper addition level of carrier solid for physical and flavor quality of the powder product was determined to be 1 : 1 ratio to jujube solid. Combined use of maltose and gum arabic produced the best quality product among the studied carrier materials, which were maltose, dextrin, condensed milk and gum arabic. Enzymatic treatment in extraction process could increase the yield by 13~39%, but hurt the sensory quality of powdered juice. Treatment by 0.5% pectinase(0.05unit/ml) may be used with lesser quality change for improved yield.
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KEYWORD
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Zizyphus jujuba WILLER, carrier, sensory Quality, enzymatic extraction
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