花生衣红色素微波提取工艺研究

Microwave Extraction of the Red Pigment of Peanut-skin and its Property

研究了利用微波辅助提取花生衣红色素 ,并得到最佳工艺条件 :提取功率为 2 40W ,提取溶剂为 60 %的乙醇 ,提取时间为 90s,料液比 (g/ml)为 1∶2 0 ,提取级数为二级 ,色素提取率为 95 .2 6%。花生衣红的最大吸收波长为 2 15和 2 80nm ;对光、热、pH稳定 ;NaCl、Ca2 + 、Mg2 + 、Cu2 + 、Zn2 + 对色素影响不大 ,Fe3+ 对色素影响很大 ;H2 O2 对色素有轻微的减色作用 ,Na2 SO3对色素的作用不明显。蔗糖能使色素增色。

Microwave extraction of red pigment from red peanut skin was studied. The results showed that the optimum condition was that extraction power was 240 W, solvent was 60% alcohol, extraction time was 90s, the weight of mixture was 20 times as large as the peanut skin, the number of extraction stage was 2 so that the extracted total yield can be up to 95.26%. It showed the maximum absorption beam of peanut-skin red was 215 nm and 280 nm and it could be stabilized between pH1～12; It had good light and heat stability. The pigment would not be harmfully affected by NaCl, Ca~ 2+,Mg~ 2+,Cu~ 2+ and Zn~ 2+,but was changed by Fe~ 3+.Na_2SO_3 had no effect on pigment color, but H_2O_2 led to colorless. Its color could be increased by adding sucrose.