Zhan-Jun Li, Feng-Jian Yang, Lei Yang, Yuan-Gang Zu
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Comparison of the antioxidant effects of carnosic acid and synthetic antioxidants on tara seed oil.
Background: In the present study, tara seed oil was obtained by supercritical fluid extraction and used to investigate the antioxidant strength of carnosic acid (CA) compared with conventional synthetic antioxidants.
Methods: The antioxidants were added to the tara seed oil at 0.2 mg of antioxidant per gram of oil. The samples were then submitted to at 60 °C 15 days for an accelerated oxidation process, with samples taken regularly for analysis. After oxidation, the samples were analyzed to determine the peroxide value, thiobarbituric acid reactive substances, conjugated diene content, and free fatty acid content. CA was investigated at three purity levels (CA20, CA60, CA99), and compared with three synthetic antioxidants (butylatedhydroxyanisole, butylatedhydroxytoluene, and tert-butylhydroquinone).
Results: The oxidation indicators showed that CA was a strong antioxidant compared to the synthetic antioxidants. The antioxidant activities decreased in the order: tert-butylhydroquinone > CA99 > CA60 > CA20 > butylatedhydroxyanisole > butylatedhydroxytoluene. These results show that CA could be used to replace synthetic antioxidants in oil products, and should be safer for human consumption and the environment.
期刊介绍：
BMC Chemistry is an open access, peer reviewed journal that considers all articles in the broad field of chemistry, including research on fundamental concepts, new developments and the application of chemical sciences to broad range of research fields, industry, and other disciplines. It provides an inclusive platform for the dissemination and discussion of chemistry to aid the advancement of all areas of research.
Sections:
-Analytical Chemistry
-Organic Chemistry
-Environmental and Energy Chemistry
-Agricultural and Food Chemistry
-Inorganic Chemistry
-Medicinal Chemistry
-Physical Chemistry
-Materials and Macromolecular Chemistry
-Green and Sustainable Chemistry
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