title: An improved HPLC method for determination of carotenoids in human serum.
abstract: An HPLC method was developed to determine the various carotenoids in human serum. A C-30 column and a mobile phase of 100% methanol (A) and 100% methylene chloride (B) with the following gradient elution were used: 90% A and 10% B in the beginning, maintained for 5 min, decreased to 78% A at 15 min, 62% A at 30 min, 52% A at 40 min, 41% A at 50 min, 38% A at 55 min, maintained for 3 min, and returned to 100% A at 65 min. A total of 21 carotenoids, including all-trans forms of lutein, zeaxanthin, alpha-cryptoxanthin, beta-cryptoxanthin, alpha-carotene, beta-carotene and lycopene, as well as their 14 cis-isomers were resolved within 51 min at a flow rate of 1.0 mL/min and detection at 476 nm. all-trans-beta-Carotene was found to be present in highest amount (256.3-864.2 ng/mL), followed by all-trans-lycopene (64.4-569.2 ng/mL), all-trans-lutein (137.9-450.3 ng/mL), all-trans-alpha-cryptoxanthin (55.7-188.2 ng/mL), all-trans-beta-cryptoxanthin (43.1-134.5 ng/mL), all-trans-alpha-carotene (20.0-122.1 ng/mL) and all-trans-zeaxanthin (9.1-21.3 ng/mL). Similar trend was observed for cis-isomers of carotenoids.
authors.affiliation: Department of Nutrition and Food Sciences, Fu Jen University, Taipei 24205, Taiwan.
authors.forename: V
authors.initials: V
authors.lastname: Rajendran
authors.forename: Y S
authors.initials: YS
authors.lastname: Pu
authors.forename: B H
authors.initials: BH
authors.lastname: Chen
mesh_terms: D002338:Carotenoids / Q000097:blood* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D014975:Lutein / Q000097:blood / Q000737:chemistry; D000077276:Lycopene; D015203:Reproducibility of Results; D013237:Stereoisomerism; D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene / Q000031:analogs & derivatives / Q000097:blood / Q000737:chemistry
chemical_list: D024341:Xanthophylls; D065146:Zeaxanthins; D019207:beta Carotene; D002338:Carotenoids; D000077276:Lycopene; D014975:Lutein