Liu Jiameng, Chen Chong, Wang Zihan, Lin Lijing
Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Chinese Academy of Tropical Agricultural Sciences Agricultural Products Processing Research Institute Zhanjiang Guangdong China.
Hainan Key Laboratory of Storage and Processing of Fruits and Vegetables Zhanjiang Guangdong China.
Food Sci Nutr. 2025 Jul 13;13(7):e70570. doi: 10.1002/fsn3.70570. eCollection 2025 Jul.
To prepare superfine longan powder (SLP) rich in polysaccharides without adding extra ingredients, the production condition was optimized via ethanol pretreatment and response surface methodology, and the characteristics of SLP were investigated in contrast with those of the coarse longan powder. The optimal condition was determined to be: the solid-liquid ratio of 1:2, soaking time of 48 h, and ethanol concentration of 75.80%. The results indicated that superfine grinding could reduce particle size and raise the specific surface area of the powders and generate better solubility and dispersibility, but worse flowability and water-holding capacity. Scanning electron microscopy analysis showed that large, uneven particles with visible edges changed to irregular and uniform granules after superfine grinding, and there were no new compositions and chemical groups. The results suggested that ethanol pretreatment combined with superfine grinding is an effective method to solve the technical bottleneck of longan powder produce.
为了在不添加额外成分的情况下制备富含多糖的超细龙眼粉（SLP），通过乙醇预处理和响应面法优化了生产条件，并与粗制龙眼粉的特性进行对比，对SLP的特性进行了研究。确定最佳条件为：固液比1:2、浸泡时间48小时、乙醇浓度75.80%。结果表明，超细粉碎可减小粉末粒径、提高比表面积，并产生更好的溶解性和分散性，但流动性和持水能力较差。扫描电子显微镜分析表明，超细粉碎后，边缘可见的大颗粒且不均匀的颗粒变为不规则且均匀的颗粒，并且没有新的成分和化学基团。结果表明，乙醇预处理结合超细粉碎是解决龙眼粉生产技术瓶颈的有效方法。
