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

Bioresources and Bioprocessing

Table 6 Partition coefficients and separation factors of lutein and zeaxanthin from variation on a solvent system of n-heptane/ethanol/water

n-heptane/ethanol/water ratio (v/v)	Partition coefficient, K_D		Separation factor, α	Settling time (s)
n-heptane/ethanol/water ratio (v/v)	Lutein	Zeaxanthin	Separation factor, α	Settling time (s)
6:5:1.3	1.527	1.658	1.086	6
5:3:1	0.891	1.016	1.140	5
4:3:1	0.988	1.150	1.164	5–7
4:3:2	0.151	0.167	1.111	5–7
6:5:1.2	0.606	0.522	1.162	~ 10
6:5:1.5	0.357	0.374	1.049	6
6:4.5:1.5	0.268	0.277	1.034	7–8