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http://dx.doi.org/10.5352/JLS.2017.27.1.44

Measurement of the Anti-oxidative Properties of Extract from Medicinal Plants Using an On-line HPLC-DPPH Assay  

Im, Do-Youn (Division of Liberal Arts and Teacher Training, Kwangju Women's University)
Pyo, Byoung-Sik (Department of Oriental Medicine Materials, Dongshin University)
Kim, Sun-Min (Department of Oriental Medicine Materials, Dongshin University)
Lee, Kyoung-In (Bio-center, Dongshin University)
Publication Information
Journal of Life Science / v.27, no.1, 2017 , pp. 44-49 More about this Journal
Abstract
Natural anti-oxidative compounds have important disease prevention and food preservation properties, in addition to anti-bacterial, anti-inflammation, anti-cancer, and skin whitening effects. High-performance liquid chromatography (HPLC), with an ultra vilolet (UV) detector coupled to a reverse phase C18 column and an online measurement system for 1, 1-diphenyl-2-picryl hydrazyl (DPPH) radicals, was used to search for potent antioxidative compounds in crude extracts. The online HPLC-DPPH assay was then applied to confirm antioxidative compounds in water extracts from Radix of Pueraria lobata, Rhizoma of Zingiber officinale, Fructus of Chaenomeles sinensis, Cortex of Ulmus pumila, and Radix of Astragalus membranaceus. To determine the yields of the extracts, the Brix% of each extract solution was measured using a refractometer. When the relative DPPH radical scavenging ability values of the water extracts were compared with those of a positive control (ascorbic acid), the water extracts of P. lobata, C. sinensis, and U. pumila were 7.77%, 4.71%, and 4.19%, respectively. The results suggest that this method provides a useful assay for rapid measurement of DPPH radical scavenging abilities and conformation of antioxidative compounds in natural products. Moreover, it can reduce the time spent on the separation of active compounds from natural materials, such as medicinal plants, in addition to the use of reagents for separation.
Keywords
Anti-oxidative ability; DPPH radical scavenging; HPLC;
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