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IJSTR >> Volume 5 - Issue 5, May 2016 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Optimization Of Microwave-Assisted Extraction Of Bioactive Compounds From Anogeissus Leiocarpus Guill. & Perr. Stem Bark Using Response Surface Methodology

[Full Text]

 

AUTHOR(S)

R. K. T. Tsatsop, G. T. Djiobie, B. S. Kenmogne, K. R. Regonne, M. B. Ngassoum

 

KEYWORDS

Anogeissus leiocarpus, antioxidants, Microwave-Assisted Extraction, Optimal conditions

 

ABSTRACT

The optimal conditions of Microwave-Assisted Extraction (MAE) of antioxidants from Anogeissus leiocarpus Guill. & Perr stem bark were determined. A second-order regression for central composite design (CCD) was used to investigate the effects of four independent variables, namely extraction time (s), irradiation power (W), solvent-to-solids ratio (ml/g) and methanol concentration (%) on the responses. The second-order regression for CCD consisted of 24 experimental points and 4 replications at the central point. Data were analyzed using Statgraphics software. The optimal conditions based on combination responses were: extraction time of 83 s, irradiation power of 538 W, solvent-to-solids ratio of 16.3 ml/g and methanol concentration of 51.84% according to the analysis of response surface. These optimum conditions yielded total phenolic contents (TPC) and total flavonoid content (TFC) of 498 mg Gallic Acid Equivalent (GAE)/ gDM and 3068 µg Quercetin Equivalent (QE)/gDM, respectively, with %DPPHsc of 53.21 % and total antioxidant activity (TAA) of 96206 µg Vitamin C Equivalent (VCE)/gDM. Close agreement between experimental and predicted values was found.

 

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