commonly used practices for the identification and characterization of the kind of cell in cord blood other than Flowcytometry and reverse-transcription polymerase chain reaction (RT-PCR).
Flow cytometry, RT-PCR, ELISA, Western blot, fluoroimmunoassay, immunoprecipitation, in situ hybridization, all of them can be used, but RT-PCR and flow cytometry are the most common.
Technique you use is just a matter of convenience, once you narrow down the surface markers and other characteristics you can even use uv-visible spectrophotometer, people use immunolabling all the time to observe stem cells under fluorescent microscope