Table 1.

The contents of the extraction yield, alkylamide, total phenolic acids, encapsulation rate, and loading capacity in freeze-dried EE and nano-EE were examined by HPLC analysis.

Quality Characteristics	Content
	Nano-EE	EE
(1) Extraction yield (%)	-	7
(2) Total phenolic acids (mg/g freeze dried extract)	35.3	20.8
(3) Isobutylamides (mg/g freeze dried extract)	0.21	0.88
(4) Encapsulation efficiency (%)	66.9	-
(5) Loading capacity (%)	39.9	-

–: not detected.