Bioresources and Bioprocessing

Table 2 The measured concentration of lutein and zeaxanthin in both DDGS and oleoresin

From: Quantification and purification of lutein and zeaxanthin recovered from distillers dried grains with solubles (DDGS)

Time (h)	Oleoresin (g)	µg/g wet DDGS		µg/g oleoresin		% extracted
Time (h)	Oleoresin (g)	Lutein	Zeaxanthin	Lutein	Zeaxanthin	Lutein	Zeaxanthin
4	1.96	15.145	11.793	61.945	48.218	100.00	96.410
8	0.8	None	0.439	None	0.005	None	3.590
12	0.2	None	None	None	None	None	None

The crude extraction solution was replaced with fresh ethanol every 4 h. The result indicates that four hours is a sufficient time-frame to recover lutein and zeaxanthin from DDGS

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