Antioxidants 2014, 3(2), 358-370; doi:10.3390/antiox3020358
Article

Effects of Different Drying Methods and Storage Time on Free Radical Scavenging Activity and Total Phenolic Content of Cosmos Caudatus

1email, 1,2,* email, 3email and 2,4email
Received: 17 February 2014; in revised form: 7 April 2014 / Accepted: 24 April 2014 / Published: 7 May 2014
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The present study was conducted to determine the effect of air (AD), oven (OD) and freeze drying (FD) on the free radical scavenging activity and total phenolic content (TPC) of Cosmos caudatus and the effect of storage time by the comparison with a fresh sample (FS). Among the three drying methods that were used, AD resulted in the highest free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) (IC50 = 0.0223 mg/mL) and total phenolic content (27.4 g GAE/100 g), whereas OD produced the lowest scavenging activity and TPC value. After three months of storage, the dried samples showed a high and consistent free radical scavenging activity when compared to stored fresh material. The drying methods could preserve the quality of C. caudatus during storage and the stability of its bioactive components can be maintained.
Keywords: Cosmos caudatus; free radical scavenging activity; total phenolic content; drying; storage
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MDPI and ACS Style

Mediani, A.; Abas, F.; Tan, C.P.; Khatib, A. Effects of Different Drying Methods and Storage Time on Free Radical Scavenging Activity and Total Phenolic Content of Cosmos Caudatus. Antioxidants 2014, 3, 358-370.

AMA Style

Mediani A, Abas F, Tan CP, Khatib A. Effects of Different Drying Methods and Storage Time on Free Radical Scavenging Activity and Total Phenolic Content of Cosmos Caudatus. Antioxidants. 2014; 3(2):358-370.

Chicago/Turabian Style

Mediani, Ahmed; Abas, Faridah; Tan, Chin P.; Khatib, Alfi. 2014. "Effects of Different Drying Methods and Storage Time on Free Radical Scavenging Activity and Total Phenolic Content of Cosmos Caudatus." Antioxidants 3, no. 2: 358-370.

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