Abstract

BINNAL, Prakash; S., Rajashekhara  and  PATIL, Jagadish. Optimization of parameters affecting dealcoholization of anthocyanin extract from red cabbage by liquid emulsion membrane using response surface methodology. J. appl. res. technol [online]. 2021, vol.19, n.6, pp.562-574.  Epub Mar 22, 2022. ISSN 2448-6736.  https://doi.org/10.22201/icat.24486736e.2021.19.6.1135.

In the present work, anthocyanin from red cabbage was extracted using 50 % ethanol. The extract was dealcoholized by the liquid emulsion membrane technique. Kerosene was used as a solvent; Span 80 was used as a surfactant and water as a stripping medium. The parameters affecting the efficiency of the liquid emulsion membrane were optimized using the response surface methodology (RSM). Design-Expert version 13 was used to perform the statistical analysis. A second-order polynomial equation was fitted to experimental data by regression analysis (R2 =0.93). Response surface plots were analyzed and optimum parameters for dealcoholization were found to be agitation speed during extraction = 200 rpm, agitation time =16.46 min, concentration of Span 80 =2.79 %, volume ratio of emulsion to feed =2.83. A maximum dealcoholization of 16.28 % was observed under these optimum conditions.

Keywords : Dealcoholization; red cabbage; anthocyanin extract; liquid emulsion membrane; response surface methodology.

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