Effect of Freeze-Thaw Pretreatment on Extraction Yield and Antioxidant Bioactivity of Corn Carotenoids (Lutein and Zeaxanthin)

Table 1

Lutein and zeaxanthin content and scavenging activity of the CGM with and without pretreatment. Data represent the mean value ± standard deviation ().

Pretreatment method	Lutein (µg/mL)	Zeaxanthin (µg/mL)	DPPH radical scavenging activity (%)	ABTS radical scavenging activity (%)	Hydroxyl radical scavenging activity (%)
No pretreatment	0.70 ± 0.052	1.76 ± 0.046	8.36 ± 0.472	7.66 ± 0.38	4.76 ± 0.216
Freeze-thaw pretreatments	9.83 ± 0.451	21.78 ± 0.683	94.59 ± 0.569	75.42 ± 2.022	55.38 ± 1.538