For the determination ofthe total carotenoid content detected with non-identified carote-noids were quantified with the response factor of the dominantcarotenoid in the chromatogram and summed up with the identi-fied carotenoids like b-apocarotenoic ester (E1% 2640 in lightpetroleum at 457 nm), canthaxanthin (E1% 2200 in light petroleumat 466 nm), lutein (E1% 2550 in ethanol at 445 nm), zeaxanthin(E1% 2540 in ethanol at 450 nm) and ß-carotene (E1% 2540 in ethanol at 450 nm).