A regressive model was obtained through optimization of ultrasonic extraction of pigment from walnut shell using the response surface methodology, based on single factor experiments. The optimized extraction condition was obtained as solid-liquid ratio 1 g : 17 mL, alcohol concentration 50% , and ultrasonic power 152 W. The pigment absorbance was predicted to be 0. 801, while the pigment absorbance validated by experiments was 0. 799 under the optimized condition. Ultrasound-assisted extraction of pigment from walnut shell is superior to the conventional water bath extraction.%以长白山野生核桃壳为原料提取棕色素,在单因素试验的基础上,通过响应面法优化超声波提取山核桃壳色素工艺,并建立回归模型.结果表明,V(溶液):m(山核桃壳)(液料比)=17mL:1g、乙醇体积分数50％、超声功率152W,山核桃壳色素吸光度的预测值为0.801,通过优化方案的验证实验得出色素的吸光度为0.799.与常规水浴法提取山核桃壳色素相比,超声辅助法的提取效果更好.
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