Method for analyzing sample comprising hemoglobin A2 by capillary electrophoresis

A method for analyzing a sample comprising hemoglobin A2 (HbA2) by capillary electrophoresis using an alkaline aqueous solution comprising a cationic polymer, the method comprising:

• obtaining an electropherogram of the sample by capillary electrophoresis;
• specifying a detection time Tx of an X peak detected at a time earlier than an HbA2 peak;
• specifying a detection time Ta2 of an HbA2 peak;
• specifying a detection time Ty of a Y peak detected at a time later than the HbA2 peak;
• calculating a correction coefficient from a relative relationship between the detection time Tx of the X peak, the detection time Ta2 of the HbA2 peak, and the detection time Ty of the Y peak;
• calculating a ratio of an HbA2 peak area to a total peak area or a ratio of a Y peak area to the total peak area in the electropherogram;
• and
• correcting the ratio of the HbA2 peak area or the ratio of the Y peak area with the correction coefficient.