title: Liquid-chromatographic determination of alpha- and gamma-tocopherols in erythrocytes, with fluorescence detection.
abstract: We have adapted to erythrocytes a method for the determination of alpha- and gamma-tocopherols in plasma and platelets. Erythrocytes (50 microL) were extracted with methanol containing tocol (internal standard) and pyrogallol. Tocopherols were partitioned into chloroform, washed, and injected in methanol onto a reversed-phase (C18) "high-performance" liquid-chromatographic column. The mobile phase was methanol/water (99/1 by vol) at a flow rate of 2 mL/min and detection was with a "high-performance" spectrophotofluorometer. The limit of detection for either tocopherol is 0.10 microgram/mL of packed cells. Analytical recoveries ranged from 93 to 104%. Some values for tocopherols in human erythrocytes are presented.
mesh_terms: D001792:Blood Platelets / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D004912:Erythrocytes / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D011748:Pyrogallol; D013050:Spectrometry, Fluorescence; D014810:Vitamin E / Q000097:blood*
chemical_list: D011748:Pyrogallol; D014810:Vitamin E