The optimization of extraction process of brown pigment from northeast walnut shell is studied.Based on single factor experiment and central composite design (CCD),a four-variable and three-level response surface analysis method is adopted to analyze the significance of various variables and their pair wise interactive effects.From the above investigation and analysis,the optimal extrac-tion condition is obtained as alcohol concentration of 60%,liquid-solid ratio of 28,extraction time of 2.2 h,and extraction temperature of 78 ℃.The pigment absorbance is predicted to be 0.505,while the absorbance validated by experiments is 0.510.%利用响应面分析的方法对东北山核桃壳棕色素的提取工艺进行优化。在单因素试验基础上，根据中心组合试验设计原理，采用四因素三水平的响应面分析法对各个因素的显著性和交互作用进行分析。结果表明：核桃壳棕色素提取的最佳工艺条件为乙醇浓度60％、液料比为28、浸提时间为2．2 h、浸提温度为78℃，在此条件下山核桃壳色素吸光度的预测值为0．505，验证实验的吸光度为0．510。
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