Improved encapsulation efficiency and storage stability of spray dried microencapsulated lutein with carbohydrates combinations as encapsulating material. (April 2020)

• Record Type: Journal Article
• Authors: Ding, Zhuang; Tao, Tao; Yin, Xiaohan; Prakash, Sangeeta; Wang, Xiao; Zhao, Yanna; Han, Jun; Wang, Zhengping
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 124(2020)
• Publication Date: 2020-04
• Subjects: Lutein -- Microencapsulation -- Experimental design -- Encapsulation efficiency -- Storage stability; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2020.109139
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: Lutein is utilized in food industry as a natural colorant or functional ingredient. Nevertheless, its application is limited by its chemical instability. The aim of this research was to develop and optimize lutein microencapsulated powders (LMPs) by spray drying to enhance storage stability of lutein. In formulation screening, LMPs, with inulin and modified starch as combined encapsulating materials (EMs), exhibited maximum encapsulation efficiency (EE) of 80.0 ± 0.6% and retention value (RV) of 87.9 ± 0.4%. The preparation process was further optimized by Box-Behnken design with EMs concentration, proportion of inulin and modified starch as EMs and inlet-drying temperature as crucial factors. EE, RV and product yield (PY) as critical quality attributes were considered. The micro-structural characterizations of six experimental LMPs were observed by scanning electron microscopy and used to describe the effects of the three crucial factors on morphological characterization of LMPs. Subsequently, the optimal condition for preparing LMPs was identified by response surface analysis. The actual EE, RV and PY values of the optimal LMPs were measured to be 85.0 ± 0.5, 90.1 ± 0.4 and 91.2 ± 0.7%, respectively. In the stability assessment, temperature degradation kinetics of microencapsulated lutein was analyzed. The chemical stability of the optimal LMPs significantly increased after exposure to four different temperatures. Highlights: Preparation of LMPs was rationally optimized to enhance lutein stability in storage. Combined carbohydrates EMs provided more EE compared with simple material. The composition of EMs significantly impacted the surface morphology of LMPs. Excessive drying temperature damaged the microparticle surface. The lutein loss of LMPs followed exponential one phase decay kinetics.