Effects of Various Drying Methods on Selected Physical and Antioxidant Properties of Extracts from Moringa oliefera Leaf Waste

Ade Chandra Iwansyah, Tran Dinh Manh, Yusuf Andriana, Muhammad Aiman bin Hessan, Faridah Kormin, Dang Xuan Cuong, Nguyen Xuan Hoan, Hoang Thai Ha, Dang Thi Yen, Pham Van Thinh, Lam The Hai and Truong Ngoc Minh
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Ade Chandra Iwansyah: Research Center for Appropriate Technology, Indonesian Institute of Sciences, Subang 41213, Indonesia
Tran Dinh Manh: Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
Yusuf Andriana: Research Center for Appropriate Technology, Indonesian Institute of Sciences, Subang 41213, Indonesia
Muhammad Aiman bin Hessan: Department of Technology and Natural Resources, Faculty of Applied Science and Technology University Tun Hussein Onn Malaysia, Pagoh 86400, Malaysia
Faridah Kormin: Department of Technology and Natural Resources, Faculty of Applied Science and Technology University Tun Hussein Onn Malaysia, Pagoh 86400, Malaysia
Dang Xuan Cuong: NhaTrang Institute of Technology Application and Research, VAST, Khanhhoa 650000, Vietnam
Nguyen Xuan Hoan: Faculty of Environment-Natural Resources and Climate Change, Ho Chi Minh University of Food Industry, Ho Chi Minh 700000, Vietnam
Hoang Thai Ha: Faculty of Environment-Natural Resources and Climate Change, Ho Chi Minh University of Food Industry, Ho Chi Minh 700000, Vietnam
Dang Thi Yen: Faculty of Environment-Natural Resources and Climate Change, Ho Chi Minh University of Food Industry, Ho Chi Minh 700000, Vietnam
Pham Van Thinh: Faculty of Environment-Natural Resources and Climate Change, Ho Chi Minh University of Food Industry, Ho Chi Minh 700000, Vietnam
Lam The Hai: Faculty of Environment-Natural Resources and Climate Change, Ho Chi Minh University of Food Industry, Ho Chi Minh 700000, Vietnam
Truong Ngoc Minh: Vietnam Academy of Science and Technology (VAST), Center for Research and Technology Transfer (CRETECH), 18 Hoang Quoc Viet Road, Hanoi 100000, Vietnam

Sustainability, 2020, vol. 12, issue 20, 1-12

Abstract: This study aims to evaluate the effects of different drying methods on the physical properties, total phenolic content, total flavonoid content, and antioxidant activity of extracts from Moringa oliefera L. (MO) leaf waste. The effects of two drying techniques, namely, sun drying (A1) and tray drying (A2), on the physical and antioxidant properties of the extracts obtained using three extracting solvents, i.e., water (b1), ethanol (b2), and ethyl acetate (b3), were investigated. These extracts were analyzed for their physicochemical and antioxidant properties. The antioxidant properties were determined with the Folin Ciocalteau, aluminum chloride, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays. Fourier transform infrared spectrophotometry (FTIR) was used to identify functional groups in the active compounds. It was found that the physical properties of the MO extract, including yield, pH, total solids, and color, showed significant differences for the two drying methods ( p < 0.05). The b3 extract had the highest value for total phenolic contents, total flavonoid contents, and antioxidant activities, followed by b2 and b1, respectively, for both the sun drying and tray drying methods. There was a significant correlation between the total phenolic and flavonoid contents and antioxidant activity (IC 50 ). This study reveals that waste material from MO leaves could be utilized as an antioxidant agent, which is expected to reduce environmental pollution from the MO processing industry.

Keywords: antioxidant properties; Moringa oleifera; physicochemical properties; tray drying (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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