Extracts with biological activities need to be preserved, as they can be degraded if exposed to light or heat. This work reports results of microparticles formation of yacon leaf extract with modified maize starch as encapsulated agent using Supercritical Fluid Extraction of Emulsions (SFEE). The variable investigated were pressure (9–13 MPa) and emulsion flow rate (Q_E) (0.5–1.5 mL/min) on the encapsulation efficiency (EE) and residual ethyl acetate content. The highest EE was 68.2 %, performed at 9 MPa and Q_E of 1.5 mL/min. The obtained particles were spherical, with size ranging from 92 to 450 nm. Analyses showed that: (i) the particles presented an amorphous characteristic; (ii) there was no degradation of the extract during the encapsulation; (iii) the SFEE improved the preservation of the antioxidant activity of the samples. This study shows the potential of using a new technology for particle production.

具有生物活性的提取物需要保存，因为如果暴露于光或热下它们可能会降解。这项工作报告了使用超临界流体萃取乳化液（SFEE），以改性玉米淀粉为包封剂，形成Yacon叶提取物的微粒的结果。研究的变量是压力（9–13 MPa）和乳液流速（Q _E）（0.5–1.5 mL / min）对包封效率（EE）和残余乙酸乙酯含量的影响。EE最高为68.2％，在9 MPa和Q _E下进行1.5 mL / min。所获得的颗粒是球形的，尺寸为92至450nm。分析表明：（i）颗粒呈现出非晶态特征；（ii）在包封过程中提取物没有降解；（iii）SFEE改善了样品的抗氧化活性。这项研究表明了使用新技术生产颗粒的潜力。