响应曲面法优化青花椒护色工艺

Optimization of Color Fixing for Zanthoxylum L. by Response Surface Methodology

[目的]探索青花椒护色的最佳工艺条件。[方法]选取新鲜青花椒为原料,研究了护色剂、抗氧化剂、pH和杀菌条件对护色的影响。在单因素试验的基础上,选择CuSO4浓度、VC浓度和杀菌时间3个影响较大的因素,以色差值为指标,采用响应面试验优化新鲜青花椒护色条件。[结果]新鲜青花椒的最佳护色工艺为CuSO4浓度550 mg/L、VC溶液浓度1 000 mg/L、杀菌时间20 min。在此条件下处理后的青花椒在第15天的色差为10。[结论]该研究可为青花椒的护色研究提供理论和试验依据。

[Objective] To explore the optimum technique conditions for color fixing of Zanthoxylum L.[Method] Selecting fresh Zanthoxylum L.as material,effects of color fixing regent,antioxidant,pH and sterilization time on color fixing were studied.Trial conditions were optimized by response surface methodology on basis of single factor test.Different concentrations of copper sulpHate,vitamin C and sterilization time were used to study color fixing effects of ZanthoxylumL.[Result] The results showed that the optimal conditions were 550 mg/L copper sulpHate,1 000 mg/L vitamin C and sterilizing under 100 ℃ for 20 min.The color difference between fresh and treated Zanthoxylum L.could drop down to 10 grades under these conditions.[Conclusion] The study will provide theoretical and experimental basis for color fixing of Zanthoxylum L.