A Study on the Antioxidant Activity of α-tocopherol Extracted from Seven Indigenous Rice Varieties
Keywords:
α-tocopherol, Indigenous rice, Northern Thailand, AntioxidantAbstract
This study aimed to determine the α-tocopherol content in seven Thai indigenous rice varieties from northern Thailand and compare their antioxidant potential. The rice varieties studied were Doi, Khanhi, Hengor Leothin, Riceberry, Khao Niew Kam, Man Pu, and Khao Chao Mali.
α-tocopherol was extracted using 95% ethanol, n-heptane, and sodium sulfate. The results showed that Khao Niew Kam had the highest
α-tocopherol content (0.25 mg/100 g), followed by Hengor Leothin and Man Pu (0.13 mg/100 g). The lowest content (0.01 mg/100 g) was found in Doi, Riceberry, Khao Chao Mali, and Khanhi rice.
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