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Microencapsulation and Establishment of Detection Method for Microencapsulation Efficiency of Antarctic Krill Oil

Abstract:

Objective: The spray-drying was used to embed the Antarctic krill oil and its detection method for microencapsulation efficiency was established in this study. Method: The optimal emulsification of Antarctic krill oil was determined through the index of emulsion stability, viscosity and particle size. On the base of above experiments, the lowfield NMR CPMG sequence was used to obtain relaxation signals of Antarctic krill oil encapsulation. The principal component regression (PCR) and partial least squares regression (PLSR) was applied to establish the pbkp_rediction models of microencapsulation efficiency. Result: The optimal emulsifying technological parameters were as follow: the mass ratio between gelatin and maltodextrin 1:3, the mass ratio between core and wall 2:3, solid content 20%, Tween-80 as an emulsifier and its contents of 3.5%. The optimal prepared Antarctic krill oil microcapsules were spherical with smooth and wrinkle-free surface under the scanning electron microscope, which particle size was between 2-10 μm and the microencapsulation efficiency attained 74.15%. And based on the low-field NMR technology, the correlation coefficients of PCR and PLSR pbkp_rediction model calibration sets and interactive verification were 0.8943 and 0.8671, respectively. Conclusion: Microencapsulation of Antarctic krill oil is feasible, and the low-field NMR combined with PLSR analysis would be suitable to detect the microencapsulation efficiency of Antarctic krill oil.