干燥过程中甘蓝叶绿素降解动力学的研究

摘要

研究甘监叶绿素在干燥过程中的降解规律，建立其降解动力学模型，探讨甘蓝漂烫后在50、60、70、80、90℃干燥过程中颜色和叶绿素含量的变化规律。结果表明：甘蓝叶绿素含量是影响其颜色的主要因素，其叶绿素降解符合一级反应动力学模型，活化能为15391．11J／mol，该模型预测值与实测值的平均相对误差仅为5．58％，证明该模型合理可信。%A kinetic model was proposed for evaluating the degradation of chlorophyll in cabbage during drying process. After blanching, cabbage was dried at 50, 60, 70, 80 ℃ and 90℃, respectively. The content of chlorophyll was the major factor affecting the color of cabbage during drying process. The chlorophyll degradation was fitted to a first-order reaction model with an activation energy of 15391.11 J/mol. The kinetic model of chlorophyll degradation in cabbage was validated with a relative error of 5.58% in comparison with the actual values, indicating high reliability and reasonability, which was reliability and reasonable.