Document Type

Article

Publication Date

1-1-2014

Abstract

Optimum extraction conditions for extraction of soluble rice bran fiber (SRBF) from defatted rice bran (DRB) were determined using response surface methodology (RSM). The three independent variables for extracting SRBF, including ratio of Ca(OH)2 solution to DRB, concentration of Ca(OH)2 and extraction temperature on the yield of SRBF were determined on the basis of single factor experiments. A Box-Behnken design (BBD) was used to investigate the effects of the three independent variables, and the BBD consisted of 15 experimental points with three replications at the center point. The experimental study examined the effect of the independent variables within the following ranges: Ca(OH)2 solution to DRB ratio range of 25:1-30:1, Ca(OH)2 concentration in the range of 2-3% and the temperature in the range of 20-100C The optimum experimental yield of SRBF (7.86±0.04%) was obtained at the extraction condition of 3% Ca(OH)2 solution with a ratio of solution to DRB of 29.75:1 (mL/g) stirred for 1h at 84C. The experimental yield percentage was in agreement with predicted yield percentage of SRBF by RSM at the optimum extraction conditions. Practical Applications: The optimum soluble rice bran fiber (SRBF) yield cannot be estimated based on just the one-factor-at-a-time (single-factor) approach, because it is not only time consuming, but also the interaction between extractions condition may not be included in the determination of the yield and/or quality. A study is needed not only to determine the optimum extraction conditions to obtain a desirable yield or quality of SRBF from defatted rice bran (DRB) but also to understand the degree of interactions between extraction conditions such as temperature, time, ratio of solvent to raw material and solvent concentration. © 2012 Wiley Periodicals, Inc.

Publication Source (Journal or Book title)

Journal of Food Processing and Preservation

First Page

441

Last Page

448

Download

Share

COinS