초록

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합성 항산화제인 BHA와 천연 항산화제인 ${\alpha}-tocopherol$, NDGA, propyl gallate, sesamol등의 항산화력을 비교하기 위하여 식용 대두유에 이들 항산화제를 첨가하여 가열처리한 후 2주간보존할때 일어나는 물리화학적인 변화와 지방산 조성의 변화를 조사하였다. 항산화력은 BHA > ${\alpha}-tocopherol$ > propyl gallate > sesamol의 순으로 BHA에 비하여 천연 항산화제가 다소 떨어졌지만 ${\alpha}-tocopherol$의 경우는 BHA에 크게 뒤지지 않는 우수한 황산화력을 나타내었다. Gas chromatography에 의한 지방산 분석의 결과 산패가 진행될수록 불포화도가 높은 linolenic acid 와 linolenic acid 의 함량은 증가하였으며 BHA와 ${\alpha}-tocopherol$을 첨가한 경우 linolenic acid와 linolenic acid 함량의 감소가 현저하게 억제되었다.

Abstract ▼ AI-Helper

The natural antioxidants such as ${\alpha}-tocopherol$, NDGA, proply gallate and sesamol, and synthetic antioxidants, BHA were used to compare antioxidative effects of those antioxidants from tile physico-chemical properties and fatty acid composition changes in the soybean oil during sto...

The natural antioxidants such as ${\alpha}-tocopherol$, NDGA, proply gallate and sesamol, and synthetic antioxidants, BHA were used to compare antioxidative effects of those antioxidants from tile physico-chemical properties and fatty acid composition changes in the soybean oil during storage. The oils were stored at $25^{\circ}C$ for 2 weeks after heat treatment. Natural antioxidants were less effective than BHA but effect of ${\alpha}-tocopherol$ was very similar to that of BHA. The order of antioxidative effect was BHA, ${\alpha}-tocopherol$, NDCA propyl gallate and sesamol. The relative contents of linoleic acid and linolenic acid was decreased as the degree of oxidative rancidity was increased. whereas content of oleic acid and palmitic acid was increased. The content of linoleic acid and linolenic acid did not decreased by addition of BHA and ${\alpha}-tocopherol$.