고추향미유의 저장 중 화학적 특성 변화
Chemical Changes of Red Pepper Seasoning Oil during Storage
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라면 수프의 품질 안정화 기술을 개발하기 위한 기초자료로 활용하고자, 라면 수프의 원료 중의 하나인 고추향미유를 65℃에서 6주간 저장하면서 화학적 변화를 조사하였다. 시료의 산가는 저장기간이 길어짐에 따라 약간 증가하였으며 과산화물가는 저장 4주에 크게 증가하다가 저장 6주에서는 감소하였다. ASTA value와 CIE L* 값, CIE a* 값, 그리고 CIE b* 값 모두 4주까지는 저장기간이 길어짐에 따라 증가하다가 6주후에는 감소하는 경향을 나타내었다. 시료를 구성하는 주요 지방산은 linoleic(51.02%), oleic(30.17%), 그리고 palmitic(11.81%) acid이었다. 저장기간이 증가할수록 myristic acid(14:0)와 palmitic acid(16:0)는 약간 증가하였으나 linoleic acid(18:2)는 감소하였고, 불포화지방산과 포화지방산의 비율은 저장기간이 증가할수록 감소하였다. 시료에 가장 많이 존재하는 유리지방산은 linoleic acid(18:2)이었는데 6주간 저장 후에는 linoleic acid(18:2)의 양이 85.5에서 65.2(㎎/㎏ oil)로 크게 감소하였고, 총유리지방산의 양은 저장기간이 증가할수록 증가하였으며, 유리 불포화지방산과 유리 포화지방산의 비율은 저장기간이 증가할수록 감소하였다.
Abstract
Chemical characteristics of red pepper seasoning oil were investigated during storage at 65℃ for 6 weeks to obtain information for the quality control of powdered soups of Korean instant noodles. The acid value increased gradually during storage. The peroxide value increased remarkably at 4 weeks of storage, but decreased at 6 weeks of storage. Both American Spice Trade Association (ASTA) value that indicates redness of red pepper and the CIE L*, a*, and b* value increased to 4 weeks of storage, but decreased at 6 weeks of storage. The fatty acids were mainly composed of linoleic (51.02%), oleic (30.17%), and palmitic (11.81%) acid. Myristic and palmitic acid content increased slightly but linoleic acid decreased during storage. The ratio of total unsaturated fatty acids to total saturated fatty acids slightly decreased during storage. In free fatty acid (FFA) composition, linoleic acid was present in the greatest amount, but it decreased remarkably from 85.5 to 65.2 (mg/kg oil) after 6 weeks of storage. Total amount of FFA increased throughout the storage period. The ratio of total free unsaturated fatty acids to total free saturated fatty acids decreased during storage.
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