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Molecules 2013, 18(9), 10452-10464; doi:10.3390/molecules180910452
Article

Cosmos Caudatus as a Potential Source of Polyphenolic Compounds: Optimisation of Oven Drying Conditions and Characterisation of Its Functional Properties

1
, 1,2
, 3
 and 4,*
1 Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia 2 Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia 3 Faculty of Pharmacy, International Islamic University Malaysia, 25200 Kuantan, Pahang, Malaysia 4 Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang Selangor, Malaysia
* Author to whom correspondence should be addressed.
Received: 28 July 2013 / Revised: 7 August 2013 / Accepted: 12 August 2013 / Published: 29 August 2013
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Abstract

The aim of the study was to analyze the influence of oven thermal processing of Cosmos caudatus on the total polyphenolic content (TPC) and antioxidant capacity (DPPH) of two different solvent extracts (80% methanol, and 80% ethanol). Sonication was used to extract bioactive compounds from this herb. The results showed that the optimised conditions for the oven drying method for 80% methanol and 80% ethanol were 44.5 °C for 4 h with an IC50 of 0.045 mg/mL and 43.12 °C for 4.05 h with an IC50 of 0.055 mg/mL, respectively. The predicted values for TPC under the optimised conditions for 80% methanol and 80% ethanol were 16.5 and15.8 mg GAE/100 g DW, respectively. The results obtained from this study demonstrate that Cosmos caudatus can be used as a potential source of antioxidants for food and medicinal applications.
Keywords: Cosmos caudatus; antioxidant capacity; RSM; optimization; polyphenolic compounds; oven drying Cosmos caudatus; antioxidant capacity; RSM; optimization; polyphenolic compounds; oven drying
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.

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Mediani, A.; Abas, F.; Khatib, A.; Tan, C.P. Cosmos Caudatus as a Potential Source of Polyphenolic Compounds: Optimisation of Oven Drying Conditions and Characterisation of Its Functional Properties. Molecules 2013, 18, 10452-10464.

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