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Related Experiment Videos

Hemoglobin A2 quantification by capillary zone electrophoresis.

Z K Shihabi1, M E Hinsdale, H K Daugherty

  • 1Pathology Department, Wake Forest University, Baptist Medical Center, Winston-Salem, NC 27157, USA. zshihabi@wfubmc.edu

Electrophoresis
|March 25, 2000
PubMed
Summary
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Capillary electrophoresis (CE) accurately quantifies Hemoglobin A2 (HbA2), a minor hemoglobin component. This method is superior to microcolumn chromatography for sickle cell trait diagnosis.

Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Hematology

Background:

  • Hemoglobin A2 (HbA2) is a minor hemoglobin component, typically ~2.2% of total erythrocytes.
  • Accurate quantification of HbA2 is crucial for diagnosing hemoglobinopathies, including sickle cell trait.

Purpose of the Study:

  • To describe and validate a capillary electrophoresis (CE) method for HbA2 separation and quantification.
  • To investigate factors influencing the accuracy and precision of HbA2 measurement by CE.
  • To compare the performance of CE with microcolumn chromatography for HbA2 quantification.

Main Methods:

  • Capillary electrophoresis (CE) utilizing an arginine Tris buffer system.
  • Investigation of variables impacting quantification accuracy and precision.

Related Experiment Videos

  • Comparative analysis against a microcolumn chromatography method.

    • Main Results:

    • A robust CE method was developed for HbA2 separation and quantification.
    • Key variables affecting CE accuracy and precision were identified.
    • CE demonstrated superior suitability for HbA2 measurement in sickle cell trait compared to microcolumn chromatography.

    Conclusions:

    • Capillary electrophoresis provides an accurate and precise method for HbA2 quantification.
    • The developed CE method is advantageous for diagnosing sickle cell trait.
    • CE offers a more suitable alternative to microcolumn chromatography for measuring HbA2.