title: A comparison of three methods for quantitation of variant hemoglobin fractions.
abstract: Three methods, cellulose acetate electrophoresis-densitometry (CAE-D), cellulose acetate electrophoresis-elution (CAE-E), and microchromatography (MGC), were evaluated to determine the best method for quantitating variant hemoglobins. Evaluations were performed in two phases. In Phase I samples of known hemoglobins were obtained and Hb S and/or Hb C were quantitated by the three methods to evaluate agreement of results. In Phase II reference samples were prepared. The Hb S concentrations from each method were compared to the reference value to determine the effect of varying concentrations of Hb S on the methods. Cellulose acetate electrophoresis-densitometry proved to be the best method for quantitating variant hemoglobins in which the concentration was greater than 35 percent. Microchromatography was shown to be the best method when Hb S was approximately 30 percent. Either the microchromatography or the cellulose acetate electrophoresis-elution method proved to be a good method for quantitating approximately 25 percent Hb S.
mesh_terms: D000755:Anemia, Sickle Cell / Q000097:blood; D002852:Chromatography, Ion Exchange; D003720:Densitometry; D003937:Diagnosis, Differential; D004586:Electrophoresis; D005069:Evaluation Studies as Topic; D006441:Hemoglobin A / Q000032:analysis*; D006444:Hemoglobin C / Q000032:analysis*; D006451:Hemoglobin, Sickle / Q000032:analysis*; D006801:Humans; D012805:Sickle Cell Trait / Q000097:blood; D013789:Thalassemia / Q000097:blood
chemical_list: D006451:Hemoglobin, Sickle; D006444:Hemoglobin C; D006441:Hemoglobin A