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Antioxidant capacity of decarboxylated rice bran extract in bulk oil

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Abstract

Decarboxylation of ferulic acid would increase the solubility in oils. Rice bran extract (RBE) containing 29 mg ferulic acid/g RBE was decarboxylated to obtain decarboxylated rice bran extract (DRBE), and its antioxidant capacity in oil system was studied. After addition of DRBE (500 ppm), oxidation was monitored for 20 days at 60 °C under the dark. To compare the oxidation degree, 500 ppm of ferulic acid and well-known lipid soluble antioxidant, α-tocopherol, were used. Contents of conjugated dienes and aldehydes were measured using 1H NMR as well as peroxide value (POV). On 7 days of oxidation, DRBE (539.0 meq/kg oil) showed lower POV than the control (819.7 meq/kg oil). Also, contents of total conjugated form and aldehydes were 194.60, and 5.94 mmol/L oil, which were lower than those of control (323.63 and 15.94 mmol/L oil). However, after 10 days of oxidation, antioxidant capacity of DRBE was not observed.

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Author notes

  1. Jung-Ah Shin and Sang-Hwa Jeong are co-first authors who contribute equally to this study.

Authors and Affiliations

  1. Department of Food Science and Technology, Chungnam National University, Daejeon, 34134, Republic of Korea

    Jung-Ah Shin, Sang-Hwa Jeong, Cai-Hua Jia & Ki-Teak Lee

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  1. Jung-Ah Shin
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  2. Sang-Hwa Jeong
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  3. Cai-Hua Jia
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  4. Ki-Teak Lee
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Correspondence to Ki-Teak Lee.

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Shin, JA., Jeong, SH., Jia, CH. et al. Antioxidant capacity of decarboxylated rice bran extract in bulk oil. Food Sci Biotechnol 27, 1041–1046 (2018). https://doi.org/10.1007/s10068-018-0334-0

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  • DOI: https://doi.org/10.1007/s10068-018-0334-0

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