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目的:拟合柴胡提取物吸湿过程中的数学模型。方法:利用重量法测试柴胡提取物吸湿过程动力学曲线和吸附-解吸等温线,运用1st Opt统计分析软件进行拟合,以均方根误差(RMSE),残差平方和(RSS)和决定系数(R2)为评价指标,筛选最佳拟合模型。结果:柴胡提取物吸湿过程动力学双指数模型、吸附-解吸等温线Peleg模型因R2更接近于1,RMSE和RSS更接近于0而拟合效果最好。柴胡提取物的吸附-解吸等温线均属于第Ⅱ种类型,柴胡提取物解吸等温线因较高的平衡含水率而出现明显的滞后现象,该滞后现象属于H3型,并且吸附、解吸机制清楚地解释了该滞后现象。结论:双指数模型和Peleg模型分别较好地拟合了柴胡提取物的吸湿动力学曲线及吸附-解吸等温线,对柴胡提取物及其他中药提取物干燥、混合、包装、贮藏等方面涉及到的防潮技术选择都有一定指导意义。
Objective: To fit the mathematical model of Bupleurum chinense extract during hygroscopic process. Methods: The kinetic curve and the adsorption-desorption isotherm of Bupleurum chinense extract were measured by gravimetric method, and were fitted by 1st opt statistical analysis software. The root mean square error (RMSE), residual sum of squares (RSS) Coefficient (R2) is the evaluation index to screen the best fit model. Results: The double exponential model of the kinetics of moisture absorption of Bupleurum chinense extract was fitted. The Peleg model of adsorption-desorption isotherm was closer to 1, and RMSE and RSS were closer to 0 and the fitting effect was the best. The adsorption-desorption isotherms of Bupleurum chinense extract belong to the second type, and the desorption isotherm of Bupleurum chinense extract shows obvious hysteresis due to the higher equilibrium moisture content. The hysteresis belongs to H3 type, and the adsorption and desorption mechanism This hysteresis is clearly explained. Conclusion: The double exponential model and the Peleg model fit the hygroscopic kinetic curve and the adsorption-desorption isotherm of Bupleurum chinense extract well, and the drying, mixing, packaging and storage of Bupleurum chinense extract and other traditional Chinese medicine extracts Involved in the choice of moisture technology has some guiding significance.