随机质心映射优化法研究核桃青皮中蒽醌类色素的提取工艺

Study on Extraction Technology of Anthraquinones Pigments from Walnut Green Husks by Random-Centroid Optimization

[目的]采用随机质心优化设计研究核桃青皮中的蒽醌类色素的超声波辅助提取工艺。[方法]试验以新疆当地核桃青皮为原料,考察提取温度、提取时间、超声时间、料液比、粉碎粒度和乙醇浓度6个影响因素对蒽醌提取率的影响。[结果]优化的提取工艺为:萃取温度64℃,萃取时间114 min,超声时间24 min,料液比0.09 g/ml,粉碎粒度20目,乙醇浓度为60%(V/V),在此条件下,核桃青皮中的蒽醌类色素提取率可达(4.84±0.14)mg/g。[结论]随机质心优化法在进行多因素优化时可以不进行单因素试验,具有试验次数少、受人为因素影响小、适应性广等特点。

[ Objective] Random-Centroid Optimization（RCO） methodology was employed to optimize the extraction of anthraquinones pigmets in Walnut Green Husks combining with ultrasonic-assisted. [ Method ] Six conditions were used to study, namely extraction temperature, extraction time, ultrasonic time, solid-liquid ratio, particle size and ethanol concentration. [ Result ] The optimal extraction conditions were as follows： extraction temperature 6,4 ℃, heating time 1 ld min, ultrasonic time 24 min, solid-liquid ratio 0.09 g/ml, particle size 20 mesh, and ethanol concentration 60% （V/V）. In this condition, the yield of anthraquinones pigments was （4. 84 ±0.14） mg/g in walnut green husk. [ Conclusion ] Parameter optimization could be carried out directly without single test by using Random-Centroid Optimization methodology, which had the advantages of fewer experiments, less anthropogenic and wide adaptability.