Serum tocopherol measurement: effect of unsuspected impurities in water.
D000328:Adult; D002855:Chromatography, Thin Layer; D004492:Edetic Acid; D006801:Humans; D008722:Methods; D013053:Spectrophotometry; D014810:Vitamin E / Q000097:blood* / Q000302:isolation & purification; D014867:Water
D014867:Water; D014810:Vitamin E; D004492:Edetic Acid