FOOD SCIENCE

Previous Articles     Next Articles

monoammonium glycyrrhizinate;crystallization;decolorizaiton;orthogonal array design

SHI Gao-feng,GONG Jian-hui,CHEN Xue-fu,WANG Guo-ying,WANG Hong-yu   

  1. Institute of Petro-chemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
  • Online:2013-08-25 Published:2013-09-03

Abstract:

Crude powder containing 66.72% monoammonium glycyrrhizinate (MAG) and having a whiteness of 74.2
was purified using a procedure involving ethanol crystallization followed by activated carbon decolorization and ethanol
recrystallization to obtain a purity of 83.32% and a whiteness of 74.2. The effects of monoammonium glycyrrhizinate-to-activated
carbon ratio as well as adsorption time and temperature on decolorization efficiency were investigated by one-factor-at-a-time
method, and the optimum decolorization conditions were determined using orthogonal array design to be adsorption at 75 ℃ for
60 min with a monoammonium glycyrrhizinate-to-activated carbon ratio of 1:3. Repeated experiments under these conditions
indicated that the procedure was stable and effective at decolorizing monoammonium glycyrrhizinate with a recovery of 68.74%.

Key words: monoammonium glycyrrhizinate, crystallization, decolorizaiton, orthogonal array design