유동층 코팅에 의한 Ascorbic acid의 흡습특성 및 저장기간 예측 (Shelf-life Estimation and Sorption Characteristics of Coated Ascorbic Acid by Fluidized Bed Coating)

서지정보

· 발행기관 : 한국식품저장유통학회
· 수록지 정보 : Food Science and Preservation / 15권 / 3호 / 332 ~ 339페이지
· 저자명 : 박수정, 윤광섭

초록

This study was performed to investigate the sorption characteristics and shelf-life of coated ascorbic acid. Stability of ascorbic acid, which oxidizes easily during storage and processing, was achieved by applying a fluidized bed coating using Zein-DP and HPMC-FCC as covering materials. The monolayer moisture content calculated using the GAB equation showed a higher level of significance than when calculated using the BET equation. The fit to the isotherm curve was in the order of Halsey, Caurie, Oswin and Khun. The equilibrium relative humidity prediction model was established in terms of time and water activity, it had higher significance. The stability of the coated ascorbic acid during storage was investigated in terms of radical-scavenging activity, which decreased with increasing time of storage and was more affected at higher storage temperatures. The quality reduction rate constant (k) was calculated by a first-order reaction rate. The reaction rate constant increased with increasing storage temperature. The shelf-life of Zein-DP-coated ascorbic acid was estimated to be 45.83 days at 20C and 63.19 days at 10C, and the shelf-life for HPMC-FCC-coated ascorbic acid was estimated to be 28.84 days at 20C and 36.14 days at 10, the ascorbic acid was 24.52 days at 20℃ and 27.22 days at 10℃, respectively. Therefore, the fluidized bed coating effectively increased the stability of ascorbic acid.

영어초록

This study was performed to investigate the sorption characteristics and shelf-life of coated ascorbic acid. Stability of ascorbic acid, which oxidizes easily during storage and processing, was achieved by applying a fluidized bed coating using Zein-DP and HPMC-FCC as covering materials. The monolayer moisture content calculated using the GAB equation showed a higher level of significance than when calculated using the BET equation. The fit to the isotherm curve was in the order of Halsey, Caurie, Oswin and Khun. The equilibrium relative humidity prediction model was established in terms of time and water activity, it had higher significance. The stability of the coated ascorbic acid during storage was investigated in terms of radical-scavenging activity, which decreased with increasing time of storage and was more affected at higher storage temperatures. The quality reduction rate constant (k) was calculated by a first-order reaction rate. The reaction rate constant increased with increasing storage temperature. The shelf-life of Zein-DP-coated ascorbic acid was estimated to be 45.83 days at 20C and 63.19 days at 10C, and the shelf-life for HPMC-FCC-coated ascorbic acid was estimated to be 28.84 days at 20C and 36.14 days at 10, the ascorbic acid was 24.52 days at 20℃ and 27.22 days at 10℃, respectively. Therefore, the fluidized bed coating effectively increased the stability of ascorbic acid.

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