前馈控制方法及其在丹红注射液醇沉工艺品质提升中的应用

Feedforward control strategy and its application in quality improvement of ethanol precipitation process of Danhong injection

该文基于质量源于设计理念,建立一种中药生产过程前馈控制方法,以减少原料质量波动对产品质量的影响。以丹红注射液的醇沉工艺为例,通过Box-Behnken试验设计,建立浓缩液性质、工艺参数与醇沉上清液性质之间的数学模型,并建立工艺参数优化模型,根据物料性质计算合适的工艺参数。比较了使用优化前后工艺参数进行醇沉得到的上清液质量。结果表明,使用前馈控制方法优化醇沉工艺参数能有效地控制上清液质量,有助于提高醇沉工艺上清液质量的一致性。

In this work, a feedforward control strategy basing on the concept of quality by design was established for the manufacturing process of traditional Chinese medicine to reduce the impact of the quality variation of raw materials on drug. In the research, the ethanol precipitation process of Danhong injection was taken as an application case of the method established. Box-Behnken design of experiments was conducted. Mathematical models relating the attributes of the concentrate, the process parameters and the quality of the supernatants produced were established. Then an optimization model for calculating the best process parameters basing on the attributes of the concentrate was built. The quality of the supernatants produced by ethanol precipitation with optimized and non-optimized process parameters were compared. The results showed that using the feedforward control strategy for process parameters optimization can control the quality of the supernatants effectively. The feedforward control strategy proposed can enhance the batch-to-batch consistency of the supernatants produced by ethanol precipitation.