Optimization on technological of high solubility SPI by succinylation modified

Succinic anhydride was used as modification reagents to modified soy protein isolate.Determine the change of solubility properties before and after modification,and established the mathematical model between solubility of protein and modified conditions.Using response surface analysis to optimize the best conditions of parameters: mass fraction of soy protein isolate: 7.0%,reaction temperature 54 ℃,succinic anhydride 11%,reaction time 2 h.Under these conditions the functional properties of succinylated SPI were improved compared with the pre-modified SPI,respectively,and solubility increased 15.73 degrees.