Sample analysis method, capillary electrophoresis solution, and sample analysis kit

A sample analysis method, comprising:

• separating hemoglobin from a sample containing the hemoglobin, in an alkaline solution by capillary electrophoresis,
• wherein the alkaline solution comprises a cationic polymer having a secondary amino group and a quaternary ammonium base,
• the cationic polymer has a structure represented by the following Formula (1) and a structure represented by the following Formula (2):
• in Formula (1), each of R1 and R2 independently represents an alkyl group having a substituent and having from 1 to 10 carbon atoms or an unsubstituted alkyl group having from 1 to 10 carbon atoms, and
• each of X in Formula (1) and Y in Formula (2) independently represents an alkylene group having a hydroxy group and 1 to 6 carbon atoms.

A capillary electrophoresis solution, comprising a cationic polymer having a secondary amino group and a quaternary ammonium base,

• wherein the capillary electrophoresis solution is used for separation of hemoglobin by capillary electrophoresis,
• the cationic polymer has a structure represented by the following Formula (1) and a structure represented by the following Formula (2):
• in Formula (1), each of R1 and R2 independently represents an alkyl group having a substituent and having from 1 to 10 carbon atoms or an unsubstituted alkyl group having from 1 to 10 carbon atoms, and X represents a divalent linking group, and
• in Formula (2), Y represents a second divalent linking group.